The null hypothesis is that the percentage of Americans who start the day with cereal for breakfast is 80%. The alternative hypothesis is that the percentage is less than 80%.
Let p be the true proportion of Americans who start the day with cereal. The sample proportion is 70/100 = 0.7. The standard error is √(p(1-p)/n) = √(0.8(0.2)/100) = 0.04.
The test statistic is (0.7 - 0.8) / 0.04 = -2.5. From the standard normal distribution table, the p-value for a one-tailed test with a test statistic of -2.5 is 0.0062.
Since the p-value (0.0062) is less than the significance level (0.05), we reject the null hypothesis. There is evidence to support the claim that the percentage of Americans who start the day with cereal for breakfast is less than 80%.
can someone help me please
here is the picture i need step by step
Answer:
Can you please post the picture of the question, then I can help.
2. Pequot Lakes, Minnesota has a spherical water tower that is known as “the world’s largest fishing bobber.” The water tower holds 6,684 cubic feet of water. The water tower needs to be repainted, and it will have to be painted twice to get two coats of coverage. One gallon of paint can cover 350 square feet. How many gallons of paint will be needed to paint the water tower?
Answer:
28.93 gallons of paint
Step-by-step explanation:
The volume of a sphere can be found using the formula:
V = (4/3)πr^3
We are given that the water tower holds 6,684 cubic feet of water, so we can use this to find the radius:
6684 = (4/3)πr^3
(6684 * 3) / (4 * π) = r^3
r = (6684 * 3 / (4 * π))^(1/3) = 35.73 feet
Next, we need to find the surface area of the sphere. The surface area of a sphere can be found using the formula:
A = 4πr^2
So, the surface area of this water tower can be found as:
A = 4π * 35.73^2 = 4π * 1286.13 = 5071.57 square feet
Finally, we need to find the amount of paint needed to paint the surface area twice. One gallon of paint can cover 350 square feet, so we can divide the surface area by 350 to find the number of gallons of paint needed:
Gallons of paint = (5071.57 * 2) / 350 = (10143.14 / 350) = 28.93 gallons
So, 28.93 gallons of paint are needed to paint the water tower twice.
the faster the better
Answer:
1 - [tex]e^{inx}[/tex]
2 - [tex]e^{5in}[/tex]
3 - [tex]e^{in^{3} x}[/tex]
Step-by-step explanation:
Which of these is the standard form of the polynomial function y=x(x+5)(x−3)
The standard form of the polynomial function y = x(x + 5)(x - 3) is
y = x³ + 2x² - 15x
What are functions?Function is a relation between a set of inputs and a set of outputs which are permissible. In a function, for particular values of x we will get only a single image in y. It is denoted by f(x).
Vertical line test:-
Whenever we want to check whether a given expression is a function or not we can apply a vertical line test, in this test we check for a single image of x , we are getting a single image or more.
If we get more images then it will not be a function.
For example, let us take, y² = 4ax
y = ±√4ax
For single value of x we get two values of y
Hence, it will not be a function.
Given that,
The polynomial function,
y = x(x+5)(x−3)
To obtain the standard form, we need to multiply out the expression and then arrange the terms in decreasing order of the degree of the monomials. The degree of a polynomial is the highest degree of its monomials.
x(x + 5)(x - 3) = x³ + (5x²) - (3x²) + (5x²) + (-15x) = x³ + 2x² - 15x
In the standard form, the coefficient of the monomial with the highest degree is 1, and the rest of the terms are arranged in decreasing order of the degree.
Thus, the standard form is x³ + 2x² - 15x
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The temperature decreasesd by 11 degrees enter a integer that represents this situation in the box
Step-by-step explanation:
The answer should be -11
Answer: -11 (negative eleven)
An integer is a real number. Which includes 0, positive numbers, and negative numbers. Since the temperature outside went down by 11 degrees rather than increased, it is negative. Which means our integer is -11.
I hope this helps & Good Luck <3 !
hello could anyone help me
I think that answer is yes
Need help fast. please
According to the model, the current population of Algeria is 38 million.
How to find the population ?The model for the population in t years from now is given by the model P = 38 ( 1 + r ) ^ t.
This means that when given the model, the current population of Algeria is 38 million because the 38 in the model represents the value of population when no years have elapsed.
We can solve for this to get :
= 38 ( 1 + r ) ^ t
= 38 ( 1 + r ) ⁰
= 38 x 1
= 38
= 38 million
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Solve the initial value problem
dx/dt−4x=cos(5t)
with x(0)=1.
x(t) = ?
We are given the following differential equation, [tex]\frac{dx}{dt}-4x=cos(5t)[/tex], with the initial condition [tex]x(0)=1[/tex]. This is a linear DE in the form, [tex]\frac{dx}{dt}+P(t)x=Q(t)[/tex], where [tex]\mu(t)=e^{\int\ {P(t)} \, dt }[/tex].
First, finding [tex]\mu(t)[/tex].
[tex]\Longrightarrow\mu(t)=e^{\int\ {P(t)} \, dt }\Longrightarrow\mu(t)=e^{\int\ {-4} \, dt }[/tex]
[tex]\mu(t)=e^{-4t }[/tex]
Multiply the DE by [tex]\mu(t)[/tex].
[tex]\Longrightarrow\frac{dx}{dt}-4x=cos(5t)\Longrightarrow e^{-4t} [\frac{dx}{dt}-4x=cos(5t)][/tex]
[tex]\Longrightarrow (e^{-4t}) \frac{dx}{dt}-(e^{-4t})4x=(e^{-4t})cos(5t)[/tex]
[tex]\Longrightarrow e^{-4t} \frac{dx}{dt}-4e^{-4t}x=e^{-4t}cos(5t)[/tex]
Verify that the L.H.S is a product rule of [tex]e^{-4t}x[/tex].
[tex]\Longrightarrow \frac{d}{dt}[e^{-4t}x ] =(e^{-4t}*-4)x+(e^{-4t})(\frac{dx}{dt} )[/tex]
[tex]\Longrightarrow \frac{d}{dt}[e^{-4t}x ] =-4e^{-4t}x+e^{-4t}\frac{dx}{dt}[/tex]
This matches, so we can move forward by integrating both sides of the DE.
[tex]\int\ {[e^{-4t}x ]'} \, =\int\ {e^{-4t}cos(5t)} \, dt[/tex]
The integral on the R.H.S is pretty nasty to do using integration by parts and u-sub. I will use a table of integrals.
[tex]\int\ {e^{ax}cos(bx) } \, dx=\frac{e^{ax}(acos(bx)+bsin(bx))}{a^2+b^2}[/tex]
Let [tex]a=-4[/tex] and [tex]b=5[/tex]
[tex]\int\ {[e^{-4t}x ]'} \, =\int\ {e^{-4t}cos(5t)} \, dt[/tex]
[tex]\Longrightarrow e^{-4t}x = \frac{e^{-4t}(-4cos(5t)+5sin(5t))}{(-4)^2+(5)^2}+C[/tex]
[tex]\Longrightarrow e^{-4t}x = \frac{e^{-4t}(-4cos(5t)+5sin(5t))}{41} +C[/tex]
Now for the initial condition, [tex]x(0)=1[/tex].
[tex]\Longrightarrow e^{-4(0)}(1) = \frac{e^{-4(0)}(-4cos(5(0))+5sin(5(0)))}{41} +C[/tex]
[tex]\Longrightarrow (1)(1) = \frac{(1)(-4(1)+(0))}{41} +C[/tex]
[tex]\Longrightarrow 1 = -\frac{4}{41} +C[/tex]
[tex]\Longrightarrow 1+\frac{4}{41} = C[/tex]
[tex]\Longrightarrow C=\frac{45}{41}[/tex]
Now we have, [tex]e^{-4t}x = \frac{e^{-4t}(-4cos(5t)+5sin(5t))}{41} +\frac{45}{41}[/tex], solve for x.
[tex]\Longrightarrow x = \frac{\frac{e^{-4t}(-4cos(5t)+5sin(5t))}{41}}{ e^{-4t}} +\frac{\frac{45}{41}}{e^{-4t}}[/tex]
[tex]\Longrightarrow x = \frac{(-4cos(5t)+5sin(5t))}{41}} +\frac{45e^{4t}}{41}[/tex]
Thus, the answer to the given differential equation with an initial condition is, [tex]x = \frac{(-4cos(5t)+5sin(5t))}{41}} +\frac{45e^{4t}}{41}[/tex].
A sweater is on sale for a 20% discount. The amount of the discount is $12. What is the original cost of the sweater? Do not include a dollar sign in your answer.
The original cost of the sweater that is on sale for a 20% discount will be $60.
What is the percentage?The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.
The percentage is given as,
Percentage (P) = [Final value - Initial value] / Initial value x 100
A sweater is on sale for a 20% discount. The amount of the discount is $12.
Let 'C' be the original cost. Then the equation is given as,
20% = ($12 / C) x 100
Simplify the equation, then we have
20% = ($12 / C) x 100
0.20 = ($12 / C)
C = $12 / 0.20
C = $60
The original cost of the sweater that is on sale for a 20% discount will be $60.
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Mrs. Gomez is buying a triangular table for the corner of her classroom. The
side lengths of the table are 5 feet, 3 feet, and 4 feet.
Is this triangular table a right triangle?
OA. No, because 3+ 4+ 5.
B. No, because 3² +4² #5²
C. Yes, because 32 +4² = 5²
D. Yes, because 3² +4² > 5²
The triangular table that Mrs. Gomez is buying for her classroom is a right triangle table because 3² +4² = 5². That is option C.
What is a right angle triangle?A right angle triangle is the type of triangle that has one side of its angle perpendicular to another and the value of the three sides can be calculated through the use of the Pythagorean formula.
The Pythagorean formula is expressed as, c2 = a2 + b2, where 'c' = hypotenuse of the right triangle and 'a' and 'b' are the other two legs.
Since, 5= c
b= 3
a = 4
Therefore, 3² +4² = 5² shows that the table is a right angle triangle.
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List all the subsets of the given set. 0
The subsets are ______
( Use a comma to separate answers as needed .)
The subsets are {}, {0}.
What is the subset in mathematics?
In mathematics, a subset is a set consisting of elements that are also elements of another set. A set A is said to be a subset of set B if and only if every element of A is also an element of B. In other words, if you have a set A and another set B, and all the elements of set A are present in set B, then set A is considered a subset of set B.
In mathematics, a subset is a collection of elements that belong to a larger set. The elements in a subset can be any type of mathematical objects, such as numbers, vectors, or functions. A set is a subset of itself, and the empty set is a subset of every set.
The subsets of the given set {0} are the empty set {} and the set itself, {0}. So, the subsets of the given set 0 are {}, {0}.
Hence, the subsets are {}, {0}.
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If points F and G are contained in a plane, then is entirely contained in that plane. A. True B. False
It is true that if points F and G are contained in a plane, then the line segment FG that connects them is entirely contained in that plane.
What is the two-dimensional plane?A two-dimensional plane, also known as a plane in two dimensions, is a flat surface that has length and width, but no thickness. It is an abstract mathematical concept that can be represented graphically.
Here,
In geometry, if two points are contained in a plane, then any line segment connecting those two points is also contained in that plane. So, if points F and G are contained in a plane, then the line segment FG that connects them is entirely contained in that plane.
Thus, it is true that if points F and G are contained in a plane, then the line segment FG that connects them is entirely contained in that plane.
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Luke has a 65-gallon rectangular aquarium with base 48 inches by 18
inches. He centers it on a rectangular tabletop. There a
re 3 inches
between each side of the aquarium and each side of the tabletop as shown
What is the area, in square inches, of the tabletop?
The area of the tabletop in square inches is 1071 square inches.
What is area?An object's area is how much space it takes up in two dimensions. It is the measurement of the quantity of unit squares that completely cover the surface of a closed figure. The square unit, which is frequently expressed as square inches, square feet, etc., is the accepted unit of area.
Given that, there are 3 inches between each side of the aquarium and each side of the tabletop.
The length of the tabletop will be:
l = 48 + 3 = 51 inches.
The width of the tabletop will be:
w = 18 + 3 = 21 inches.
The area of the table top will be:
A = (l)(b)
A = (51)(21)
A = 1071 square inches.
The area of the tabletop in square inches is 1071 square inches.
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Let u =(a,7) and v =(4,4)a.find the value of a such that u is parallel to vb.two nonzero vectors u(u1,u2) and v(v1,v2) are perpendicular to each other if 0. find the value of a such that u is perpendicular to v.
The value of a that makes u parallel to v is a = 4 and the value of a that makes u perpendicular to v is -7.
How to solve vectors using dot and scalar product?a. For two vectors to be parallel, their direction ratios must be equal. In other words, their components must have the same ratio. For vectors u = (a, 7) and v = (4, 4), we have:
u1/u2 = a/7 = v1/v2 = 4/4
So the value of a that makes u parallel to v is a = 4.
b. For two nonzero vectors to be perpendicular, their dot product must be equal to zero. The dot product of u = (a, 7) and v = (4, 4) is given by:
u · v = a * 4 + 7 * 4 = 4a + 28
To make this equal to zero, we can solve for a:
4a + 28 = 0
4a = -28
a = -7
So the value of a that makes u perpendicular to v is -7.
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Ariana loves making things she can wear. She makes a necklace by joining together 10 large pink paper clips. Each paper clip has a mass of 2 grams.
The total mass of the necklace is 20 grams.
What is Multiplication?Multiplication of two numbers is defined as the addition of one of the number repeatedly until the times of the other number.
a × b means that a is added to itself b times or b is added to itself a times.
Given that,
Ariana loves making things she can wear. She makes a necklace by joining together 10 large pink paper clips. Each paper clip has a mass of 2 grams.
Total number of paper clips used to make necklace = 10
Mass of each clip = 2 grams
To find the total mass of the necklace, multiply the number of clips used to make necklace with the mass of each clip.
Mass of necklace = 10 × 2 grams = 20 grams
Hence 20 grams is the mass of the necklace.
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find the value of x. show process please!
Therefore, since the total of all the angles is 180°, the value of the other angle is 100°, 40°, and 40°.
what is angles ?In Trigonometry, an angle is a curve made up of two rods, referred to as the angle's sides, which thus converge at a center point regarded as the ball's vertex. Two rays can create an angle in the region where they are arranged. Additionally, when airplane collide, an angle is created. Dihedral angles are what they are called. An offset is a possible shape spanning two radiation or lines with an identical termination in planar geometry. The English term "angle" comes from the Latin word "angulus," which meaning "horn." The vertex is the common endpoint of the two rays, also know as the faces of the angle.
given
one angle = 40°
other angle = (11x - 18)°
in triangle sum of all angle = 180°
40° + 11x - 18 + 40 = 180
80 + 11x - 18 = 180
62 + 11x = 180
11x = 180 - 62
11x = 118
x = 10 . 2
Therefore, since the total of all the angles is 180°, the value of the other angle is 100°, 40°, and 40°.
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A graphic company charges $60 per hour for the work of its most senior graphic artists, $30 per hour for the work of a production designer, and $19 per hour for the
work of a trainee. A recent project required 34 hours of work from a senior artist, 13 hours from a production designer, and 35 hours from a trainee. Write out a
mathematical statement for calculating the total labor cost, and then compute this cost.
Select the correct choice below and fill in the answer box to complete your choice.
(Simplify your answer.)
OA. $60+34+$30+13+$19+35-$
OB. (34+13+35) x ($60+$30+$19)=$
OC. 34x13x35+$60 × $30x$19=$
OD. 34×$60+ 13× $30+35x$19=$
Considering the definition of an equation, a mathematical statement for calculating the total labor cost is Total labor cost= 60×S + 30×PD + 19×T and the total labor cost for the recent project is $3,160.
Definition of equation
An equation is the equality between two algebraic expressions connected by the equals sign in which some known data are included together with one or more unknown values, also known as unknowns.
The terms of an equation are the addends that make up the members of an equation, whereas the members of an equation are each of the expressions that appear on both sides of the equal sign.
Finding the value that satisfies an equation is what is meant by finding its solution. By converting the unknown to the answer in this manner, the equality must be true.
This case
In this case, you consider:
S= hours of work from a senior artist.
PD= Production designer labor hours.
T= hours of work from a trainee.
On the other hand, you know that Girilla Graphics charges:
For the work of its most senior graphic artists, they charge $60 per hour.
For production designer work, the hourly rate is $30.
$19 per hour for a trainee's labor.
Therefore, the following equation can be used to determine the project's overall labor costs:
Total labor cost= 60×S + 30×PD + 19×T
A recent project required:
A senior artist's 34 hours of labor.
13 hours from a production designer.
35 hours from a trainee.
So, the following formula can be used to determine the project's overall labor costs:
Total labor cost= 60×34 + 35×13 + 19×35
Solving:
Total labor cost= $3,160
In summary, a mathematical statement for calculating the total labor cost is Total labor cost= 60×S + 30×PD + 19×T and the total labor cost for the recent project is $3,160.
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A bicycle has a listed price of 691.95 before tax. If the sales tax rate is 7.75% , find the total cost of the bicycle with sales tax included.
Answer:
745.57
Step-by-step explanation:
[tex]691.95 \times \frac{7.75}{100} = 53.62[/tex]
[tex]53.62 + 691.95 = 745.57[/tex]
(25 POINTS) How many solutions does the system of linear equations represented in the graph have?
One solution at (-1, 0)
One solution at (0, -1)
No solution
Infinitely many solutions
The correct option regarding the solution of the system of equations is given as follows:
One solution at (-1, 0).
What is the solution to the system of equations?We want to obtain the graphic solution for the system of equations, hence we obtain the point of intersection of the two equations.
For this problem, we have a single equation, hence the solution is obtained when the graph crosses the x-axis.
The graph crosses the x-axis when x = -1 and y = 0, hence the solution is given as follows:
(-1,0).
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A statistics class suspected that students at their school were getting less than 8 hours of sleep. They took a random sample of 42 students and asked them how many hours of sleep they get per night. The students in the sample reported sleep amounts that had a mean of 7.5 hours and a standard deviation of 1.6 hours. These results produced a test statistic of t -2.03 and a P-value of approximately 0.025. Assuming the conditions for inference were met, what is an appropriate conclusion at the a = 0.05 significance level?
Choose 1 answer: A. Fail to reject the null hypothesis. This isn't enough evidence to conclude that the mean amount of sleep is less than 8 hours. B. Fail to reject the null hypothesis. This is strong evidence that the mean amount of sleep is less than 8 hours. C. Reject the null hypothesis. This is strong evidence that the mean amount of sleep is less than 8 hours. D. Reject the null hypothesis. This isn't enough evidence to conclude that the mean amount of sleep is less than 8 hours.
The correct answer is to Reject the null hypothesis. This is strong evidence that the mean amount of sleep is less than 8 hours.
The test statistic of t = -2.03 and P-value of approximately 0.025 suggest that the mean amount of sleep for students is significantly less than 8 hours.
The P-value of 0.025 is less than the significance level of 0.05, which means that there is enough evidence to reject the null hypothesis that the mean amount of sleep is 8 hours.
Therefore, the appropriate conclusion at the a = 0.05 significance level is that the mean amount of sleep for students is less than 8 hours.
Hence, the correct answer is C.
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Find the arc length function for the curve measured from the point P in the direction of increasing t and then reparametrize the curve with respect to arc length starting from P, and (b) find the point 4 units along the curve (in the direction of increasing t) from P. r(f) = (5 - t) i + (4t - 3) j + 3t k. P(4, 1, 3)
The new arc length function for the curve after reparametrization is as follows
[tex]\\\\r(s) = ( 4 - \frac{s}{\sqrt{26}})i + (\frac{4s}{\sqrt{26} } + 4)j+(\frac{3s}{\sqrt{26} } + 3)k[/tex]
What is meant by the arc length of a curve?
The distance between two places along a segment of a curve is known as the arc length.
The formula for arc length is used to determine how far something is along the curved line that makes up an arc. The arc length is, to put it simply, the distance that passes through the curved line of the circle that forms the arc.
Given,
Vector equation of curve r(t) = (5 - t) i + (4t - 3) j + 3t k
Given P = (4, 1, 3)
5 - t = 4
So, t = 1
Now differentiate r(t)
r'(t) = -i + 4j + 3k
Magnitude of r'(t) = |r'(t)| = √[(-1)² + 4² + 3²] = √26
The arc length function for the curve
[tex]s = \int\limits^t_1 { |r'(t)| } \, dt = \int\limits^t_1 { \sqrt{26} } \, dt = \sqrt{26} (t-1)[/tex]
[tex]t = \frac{s}{\sqrt{26} } + 1[/tex]
Now to reparametrize the curve with respect to arc length, substitute t with (s/√26) + 1 in r(t).
[tex]r(s) = (5 - ( \frac{s}{\sqrt{26} } + 1)) i + (4( \frac{s}{\sqrt{26} } + 1) - 3) j + 3( \frac{s}{\sqrt{26} } + 1) k\\\\r(s) = ( 4 - \frac{s}{\sqrt{26}})i + (\frac{4s}{\sqrt{26} } + 4)j+(\frac{3s}{\sqrt{26} } + 3)k[/tex]
Therefore the new arc length equation of the curve when [tex]t = \frac{s}{\sqrt{26} } + 1[/tex] is as follows
[tex]\\\\r(s) = ( 4 - \frac{s}{\sqrt{26}})i + (\frac{4s}{\sqrt{26} } + 4)j+(\frac{3s}{\sqrt{26} } + 3)k[/tex].
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evaluate the function at the given value of the independent variable. simplify the results. (if an answer is undefined, enter undefined.)f(x) = 1/√(x-4)f(x) - f(5) / x - 5
The function at the given value of the independent variable, f(x) = 1/√(x-4)f(x) - f(5) / x - 5 is (x-5).
Each element of X is given precisely one element of Y by the function from a set X to a set Y. The sets X and Y are collectively referred to as the function's domain and codomain, respectively. Initially, functions represented the idealised relationship between two changing quantities.
We have given function as ,
f(x) = 1/√(x-4)
We have to find f(x) - f(5)/x-5
f(x) = f(5)/x-5 = 1/√(5-4)/(x-5)
= 1/√(5-4)/(x-5)
= (x-5)/√(5-4)
= (x-5)
Therefore, The function at the given value of the independent variable, f(x) = 1/√(x-4)f(x) - f(5) / x - 5 is (x-5).
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True or False: When applying a line of best fit to a data set, you should always set the intercept to zero such that the best fit line passes through the origin (0,0).
In how many ways can a committee of four Democrats and three Republicans be formed from a group of ten
Democrats and eleven Republicans?
A committee of four Democrats and three Republicans can be formed from a group of ten Democrats and eleven
Republicans in
different ways.
The number of ways in which a committee of four Democrats and three Republicans be formed from a group of ten Democrats and eleven Republicans is 34650 ways.
What is permutation and combination?By choosing some items from a set and creating subsets, permutation and combination are two approaches to represent a group of objects. It outlines the numerous configurations for a particular set of data. Permutations are the selection of data or objects from a set, whereas combinations are the order in which they are represented. Both ideas are critical to mathematics.
Here, the differences between permutation and combination are described in detail.
The number of ways in which we can select a committee of 4 democrats from ten democrats is:
P = 10C 4 = 10! / (4)! (10 - 4)!
P = 210
The number of ways in which we can select a committee of 3 Republicans from 11 Republicans is:
P = 11C 3 = 11! / 3! (11 - 3)!
P = 165
The number of ways in which a committee of four Democrats and three Republicans be formed from a group of ten Democrats and eleven Republicans is:
P = (210) (165) = 34650
The number of ways in which a committee of four Democrats and three Republicans be formed from a group of ten Democrats and eleven Republicans is 34650 ways.
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Please solve this for me, this is all the info presented in the question.
About 0.04% percent of quokkas weigh over 15.5 pounds.
What is normal distribution?Normal distribution, also known as the Gaussian distribution, is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.
Given that, the weights of quokkas can be described by the Normal model N(10, 2.7).
Let Y the weights of quokkas
Given that, Y~N(μ= 10, σ²=2.7)
So, σ=1.643
a) The probability, P(Y＞15.5) denotes chances that quokkas weight over 9.3 pounds, and it is,
P(Y>9.3) = P(Z> (15.5-μ)/σ)
= P(Z> (15.5-10)/1.643)
= P(Z>3.347)
= 0.0004
= 0.0004×100 =0.04%
b) The probability, P(Y＜11.9) denotes chances that quokkas weight under 11.9 pounds, and it is,
P(Y>9.3) = P(Z> (11.9-μ)/σ)
= P(Z> (11.9-10)/1.643)
= P(Z>1.156)
= 0.1250
= 0.1250×100 =12.5%
c) The probability, P(11.9≤Y≤15.5) denotes chances that quokkas weight will be between 11.9 and 15.5 pounds, and it is,
P(11.9≤Y≤15.5) = P((15.5-μ)/σ ≤ Z ≤ (11.9-μ)/σ)
= P((15.5-10)/1.643) ≤ Z ≤ (11.9-10)/1.643)
= P(3.347≤ Z ≤1.156)
= P(Z≤3.347)-PZ ≤1.156)
= 0.0004-0.1250
= 0.1246
= 0.1246×100
= 12.46%
Therefore, about 0.04% percent of quokkas weigh over 15.5 pounds.
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Find the imaginary part of (5 - 12i)²
(~P ∧ ~Q) ∨ (~P ∧ ) ∨ (P ∧ ~Q),
For the circuit corresponding to the Boolean expression given above, there is an equivalent circuit with at most two logic gates. Construct such a circuit and explain the construction in detail.
Answer:
The equivalent circuit can be constructed using two NAND gates. The NAND gate is universal and can be used to implement all other logic gates including AND, OR, NOT, etc.
Here's the construction of the equivalent circuit:
First NAND gate: The first NAND gate implements the expression (~P ∧ ~Q). The inputs to the gate are P and Q, and the output is connected to the first input of the second NAND gate.
Second NAND gate: The second NAND gate implements the expression (~P ∧ (output of first NAND gate)) ∨ (P ∧ ~Q). The second input of the second NAND gate is connected to the output of the first NAND gate. The output of the second NAND gate is the final output of the circuit.
This circuit implements the given Boolean expression and has at most two logic gates.
Omari drives a car that gets 18 miles per gallon of gasoline. The car's gasoline tank holds 15 gallons. The distance Omari drives before refueling is a function of the number of gallons of gasoline in the tank. Identify a reasonable domain for this situation.
(A) 0 to 18 miles
(B) 0 to 270 miles
(C) 0 to 15 miles
(D) 0 to 60 miles
Identify a reasonable range for the function in the question above.
(A) 0 to 18 miles
(B) 0 to 270 miles
(C) 0 to 15 miles
(D) 0 to 60 miles
a) The domain of the function is 0 to 15 miles
b) The range of the function is 0 to 270 miles
What are domain and range?The domain of a function is the set of values that we are allowed to plug into our function. This set is the x values in a function such as f(x). The range of a function is the set of values that the function assumes. This set is the values that the function shoots out after we plug an x value in.
The range is the set of outputs of a relation or function. In other words, it's the set of possible y values. Recall that ordered pairs are of the form (x,y) so the y coordinate is listed after the x. The output is listed after the input.
Given data ,
Let the mileage of the car = 18 miles per gallon
The amount of gasoline the car can hold = 15 gallons
Let the distance to empty be a function of mileage of the car × amount of gas in gallons
Now , the domain of a function is the set of values that we are allowed to plug into our function which ranges from 0 to 15
So , distance to empty = 18 x 15 = 270
So , the range of the function is the set of output values which ranges from 0 to 270
Hence , the domain of the function is 0 to 15 miles and the range of the function is 0 to 270 miles
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Daniel invests a lump sum of money in a savings account with a fixed annual interest rate of 5% that is compounded
continuously. After 7 years, the account balance reaches $5,676.27. How much was initially invested?
Using Compound Interest, The initially invested amount was $5400.
What does compound interest mean?The interest you earn on interest is known as compound interest. Simple math may be used to demonstrate this: if you have $100 and it generates 5% interest annually, you will have $105 at the end of the first year. You'll have $110.25 after the second year is over.
The formula for compound interest is
[tex]C = P(1 + \frac{r}{n})^{nt}[/tex]
Where C is the compound interest value after n years.
P is the principal amount.
I is interest.
n is the number of years.
It is given that percentage of interest is 5% so I=0.05. C=$5676.27.
n=7.
According to the formula of compound interest,
5676.27 = P(1+0.05)7 P = 5676.27 1.051084
P = 5400
Therefore the amount that was invested initially was $5400.
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Solve for x and y: x=5-2y 6y=5-3x
Based on the given system of equations, the value of x and y are undefined.
How to solve this system of equations?In order to solve the given system of equations, we would apply the substitution method. From the information provided in the image attached above, we have the following system of equations:
x = 5 - 2y .......equation 1.
6y = 5 - 3x .......equation 2.
By using the substitution method to substitute equation 1 into equation 2, we have the following:
6y = 5 - 3(5 - 2y)
6y = 5 - 15 + 6y
6y = -10 + 6y
6y - 6y = -10 (no solution).
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