Answer:
The ratio of the population of Japan to the population of Brazil is 1.30 x 108 : 1.95 x 108, which can be simplified to 13:19. Therefore, x = 6.
Step-by-step explanation:
RST has vertices R(0,0), S(6,3), and T(,3-3). R'S'T' is the image of RST after a dilation with center (0,0) and scale factor 2/3 . What are the coordinates of point T'?
The coordinates of point T' is (2, -2)
How to determine the image pointA dilation is a transformation that changes the size of a figure but not its shape.
In a dilation with respect to the origin, a point (x, y) is transformed to a point (kx, ky) where k is a scale factor.
In this case, the point T (3, -3) is transformed under a dilation of 2/3 with respect to the origin.
So the image point is (kx, ky) = (3 * 2/3, -3 * 2/3) = (2, -2)
So the image point of T under a dilation of 2/3 with respect to the origin is (2, -2)
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use a maclaurin series in this table to obtain the maclaurin series for the given function. f(x) = arctan(x8) [infinity] n = 0
The Maclaurin series for the function f(x) = arctan(x8) can be obtained as follows: f(x) = arctan(x8) = ∑ (-1)^n x^(8n+1) / (8n + 1), n = 0 to ∞
The Maclaurin series for arctan(x) is an alternating series, meaning that the signs of the terms alternate between positive and negative. The terms of the series also get smaller in magnitude as n increases, so the series converges rapidly for small values of x.
The Maclaurin series for the function f(x) = arctan(x8) can be obtained as follows: f(x) = arctan(x8) = ∑ (-1)^n x^(8n+1) / (8n + 1), n = 0 to ∞
This Maclaurin series representation of arctan(x8) is useful for approximating the value of the function for small values of x. To obtain more accurate results for larger values of x, one can use more terms from the series or use other numerical methods to calculate arctan(x8).
Therefore, The Maclaurin series for the function f(x) = arctan(x8) can be obtained as follows: f(x) = arctan(x8) = ∑ (-1)^n x^(8n+1) / (8n + 1), n = 0 to ∞
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A triangular land having area 336 q meter and perimeter 84 meter ha length of an edge 26 meter. Calculate the meaurement of remaining two ide
A triangular land has area 336 q meter, perimeter 84 meter and length of an edge 26 meter. The lenght of the remaining two sides are both 29 meters long.
Let's call the length of the remaining two sides x.
Since the perimeter of the triangle is 84, then the sum of all three sides is 84, so:
x + x + 26 = 84
Therefore, the sum of the remaining two sides is:
2x = 84 - 26 = 58
And the length of each remaining side is:
x = 58 / 2 = 29 meters required lenght of the remaining two sides.
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the sum of lukes age and gibsons age is 73 if lukes age is five years less than twice gibsons age how old is luke
Lukes's age is 47
Gibson's age is 26
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Lukes's age = x
Gibson's age = y
Now,
x + y = 73 ______(1)
x = 2y - 5
Substituting in (1)
2y - 5 + y = 73
3y = 78
y = 26
Now,
x = 2 x 26 - 5
x = 52 - 5
x = 47
Thus,
Lukes's age = 47
Gibson's age = 26
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the logarithm is important when working with exponential dynamics. what is the relation between both?
The logarithm and exponential functions are inverse of each other. The exponential function raises a number to a power and the logarithm gives the power that the number has to be raised to in order to equal a given value. In other words, the exponential function expresses exponential growth, while the logarithm expresses exponential decay.
For example, if y = 2^x, then x = log2(y). This logarithmic relationship is useful in solving exponential problems and understanding exponential dynamics.
In exponential dynamics, logarithms are used to study and model changes that occur at exponential rates, such as population growth or decay, interest rate calculations, and many other real-world applications. The logarithmic relationship helps to simplify the exponential equations and make them easier to work with.
In summary, the logarithm and exponential functions are important in understanding exponential dynamics because the logarithmic relationship helps to simplify exponential problems and make them easier to solve.
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Find the probability that in 200 tosses of a fair die, we will obtain at most 30 fives. Use the normal distribution to approximate the desired probability.
Answer:
0.2643
Step-by-step explanation:
Find the probability that in 200 tosses of a fair die, we will obtain at most 30 fives Summary: When a fair die is tossed 200 times, the probability of obtaining at most 30 fives is 0.2643.
find the compsoite funciton which expresses the given correspeonecce correctly
The composite function which expresses the given correspondence correctly is f of g of x
Composite functions are when the output of one function is used as the input of another. If we have a function f and another function g, the function f g ( x ) fg(x) fg(x), said as “ f of g of x”, or “ f g fg fg of x”, is the composition of the two functions.
The composite function rule shows us a quicker way. If f(x) = h(g(x)) then f (x) = h (g(x)) × g (x). In words: differentiate the 'outside' function, and then multiply by the derivative of the 'inside' function.
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complete the conversion from 24.1 kg of body weight to milligrams (mg) of cephalexin administered per day.
The formula is also used to ensure that the patient is not overdosed or underdosed ,24.1 kg of body weight, 723 mg of cephalexin should be administered per day.
The conversion from 24.1 kg of body weight to milligrams (mg) of cephalexin administered per day can be calculated using the following formula:
Dose (mg) = Desired dose (mg/kg) x Body Weight (kg).
In this case, the Desired dose is 30 mg/kg. So, to calculate the total dose of cephalexin per day:
Dose (mg) = 30 mg/kg x 24.1 kg
Dose (mg) = 723 mg/day
Thus, for 24.1 kg of body weight, 723 mg of cephalexin should be administered per day.
The formula used in this calculation is a standard formula used to calculate the dose of medication to be administered to a patient based on their body weight. The formula is used to ensure that the patient receives the appropriate dosage of medication and that the medication is safe and effective. The formula is also used to ensure that the patient is not overdosed or underdosed, which can cause side effects or other medical problems.
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Question Decide if the expressions in each pair are equivalent. Select true or false for each.
a) (x + x + x + x) and (4x) are equivalent (Select ] b) (5x) and (x + 5) are equivalent
true or false
(a) The expressions (x + x + x + x) and (4x) are equivalent.
(b) The expressions (5x) and (x + 5) are not equivalent.
Equivalent expressions are expressions that perform the same function notwithstanding their appearance. If two algebraic expressions are equivalent, they have the same value when the variable is set to the same value.
a) True
The expressions (x + x + x + x) and (4x) are equivalent.
Both expressions represent the same mathematical operation, which is adding x four times.
b) False
The expressions (5x) and (x + 5) are not equivalent. They represent different mathematical operations.
The expression (5x) is multiplying x by 5, while the expression (x + 5) is adding x and 5.
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Pls hurry !!
Which of the following represents the total area of the figure? 16.425 in² 20.775 in² 24.15 in² 28.5 in²
Answer: A) 16.425 in^2.
Step-by-step explanation: The figure is broken down, so let's find the area of the rectangle first. We are given 4 in and 2.3 in, which can be multiplied to get 9.2 in. Now, we need to find the area of the two triangles, but let's start with the one to the left. The area of a triangle is b x h x 1/2. 2.3 in x 2.5 in is 5.75 in, but we need to multiply that by 1/2 which is 2.875 in. Finally, we can find the area of the bottom triangle by using the same formula. 3 in x 2.9 in is 8.7 in, but we need to multiply it by 1/2, which is 4.35 in. Now, all we need to do is add all the areas we found together to get the total area of the figure. 9.2 in + 2.875 in + 4.35 in is 16.425 in^2, which means that option A is your answer.
Let me know if this is right! :)
Answer:
16.425 in²
Step-by-step explanation:
total area of the figure= area of (left triangle+ rectangle+ down triangle)
=1/2*base*height+length*breath+ 1/2*base*height
=1/2*2.5*2.3+4*2.3+1/2*3*(5.2-2.3)
=16.425 in²
Erika went to the store. She got a pencil for 16¢ and a tablet for 25¢. She gave the storekeeper 50¢. How much more money did she get back?
Answer:
9c
Step-by-step explanation:
16+25=41
50-41=9
fnfnx
the helix r(t) = cos(πt/2), sin (πt/2),t) intersects the sphere x^2 + y^2 + z^2 = 2 in two points. Find the angle of intersection at each point.
the helix r(t) = cos(πt/2), sin (πt/2),t) intersects the sphere x^2 + y^2 + z^2 = 2 in two points.
the angle of intersection at each point: θ = cos⁻¹ (√2/√π²+4)
the angle of intersection at each point: α = cos⁻¹(-√2 /(√π² +4))
What is helix?Scientists in the fields of physics, engineering, and biology all do research on helices, which are a significant topic in the theory of curves in differential geometry. Helix (or generic helix) is defined as tangent vector field in 3-dimensional Euclidean space establishing a fixed angle with the curve's direction. A curve for which the tangent forms a constant angle with a fixed line is referred to as a helix or coil.
helix: r(t) = < cos(πt/2), sin(πt/2), t > sphere: x² + y² + z² = 2
put it in the sphere's equation we get:
next, {cos(πt/2)}² + {sin(πt/2)}² + t² = 2
or, 1 + t² = 2
or, t² = 1
or, t = ± 1
thus, points of intersection r(1) = < cos(π/2), sin(π/2), 1 > = < 0, 1, 1 >
r(-1) = < cos(-π/2), sin(-π/2), -1 > = < 0, -1, -1 >
angle intersection is angle between their tangent:
helix:
r(t) = < -π/2 sin(πt/2), π/2 cos(πt/2), 1 >
r'(1) = < -π/2, 0, 1 > .........(i)
r'(-1) = < π/2, 0, 1 > ......... (ii)
sphere:
f = (x² + y² + z² - 2) = 0
Δf = <2x, 2y, 2z>
Δf (0,1,1) = <0,2,2> ................ (iii)
Δf (0,-1,-1) = <0,-2,-2> .............(iv)
angle between (i) and (iii) (at, t = 1)
cosθ = {r'(1) Δf (0,1,1)} / {|r'(1)| |Δf (0,1,1)|]
θ = cos⁻¹ (√2/√π²+4)
angle between (ii) and (iv) (at, t = 1)
cosα = r'(-1)Δf (0,-1,-1) / ||r'(-1)|| ||Δf (0,-1,-1) ||
cos α = -√2 /(√π² +4)
α = cos⁻¹(-√2 /(√π² +4))
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Write the next three terms of the geometric sequence. 81, - 27, 9, - 3, ...
Answer:
1 - 1/3 1/9
Step-by-step explanation:
Common ratio is
81 * r = - 27
r= - 1/3
-3 * - 1/3 = 1
1 x - 1/3 = -1/3
-1/3 * - 1/3 = 1/9
A real etate office manage an apartment complex with 40 unit. When the rent i $780 per month, all 40 unit are occupied. However, when the rent i $852, the average number of occupied unit drop to 36. Aume that the relationhip between the monthly rent p and the demand x i linear. (Note: the term demand refer to the number of occupied unit. )
(a) Write a linear equation giving the demand x in term of the rent p
The linear demand equation: x = m(p) + b, where x is the number of occupied units, p is the monthly rent, and m and b are constants and the linear demand equation in this case is:
x = -1.04p + 44.16
To find the linear equation, we need to determine the slope (m) and the y-intercept (b). Using the two points provided, we can write a system of equations:
When p = $780, x = 40 units
40 = m($780) + b
When p = $852, x = 36 units
36 = m($852) + b
Solving for m and b, we get:
m = -1.04 and b = 44.16
So, the linear demand equation is:
x = -1.04p + 44.16
This equation represents the inverse relationship between the monthly rent and the demand, where a higher rent results in a lower demand and vice versa.
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S2 22/23 Math 6 B (CL),7.20 / 1. Ratios, Proportions, and Perce
X
Find the value that makes the pair of ratios equivalent.
12:42, 2:x
The value that makes the pair of ratios equivalent is x = 7.
What is cross multiplication?To discover the unknown values in a mathematical equation, we cross multiply the numbers in the equation. The method of cross multiplication is frequently employed to identify the missing variable in an equation. We multiply both the numerator and denominator of the provided expression or fractions.
The given pair of ratios is:
12:42 = 2:x
12 /42 = 2/ x
Using cross multiplication we have:
12x = 2(42)
x = 7
Hence the value that makes the pair of ratios equivalent is x = 7.
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in slope intercept form
y+3/5=-4(x-1/2)
Answer:
y = -4 + 1.4
Step-by-step explanation:
y+3/5 = -4(x-1/2)
y + 3/5 = -4x + 2
y + 0.6 = -4x + 2
y = -4 + 1.4
In a car i moving in a traight line with peed 18 km/h. It i topped in 55 by applying brake. Find the peed of car after 2 of applying the brake
The car travel before stopping is 400 meters
The car's initial speed was 80 m/s.
Acceleration/Deferral = 8 m/s2.
The following is the equation of motion for time t and distance s:
v = u + at
s = ut + 1/2 * a * t ^2
v = final velocity = 0 where
Thus, s = 80 * 10 - 1/2 * 8 * 10 *10
= 800 - 400
= 400 meters were covered before stopping, giving us 0 = 80 - 8 * t t
= 80/8
= 10 seconds.
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The full question:
A car moving a straight highway with a speed of 80 m/s is forced to slow down at a rate of 8 m/s^2. How far does a car travel before stopping?
What is wrong with the following statement? "The results of the experiment do not agree with the theory, there's something wrong with the experiment"?
The statement "The results of the experiment do not agree with the theory, there's something wrong with the experiment" is wrong as it does not indulge any other reasons for the results of the experiment not agreeing with the theory.
This statement assumes that the experiment is always at fault and neglects the possibility that the theory may be incorrect or incomplete.
The outcome of an experiment can be influenced by various factors, such as measurement errors, incorrect experimental design, or limitations of the equipment used.
Thus, it is always important to consider multiple explanations before concluding that there is a problem with the experiment.
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A bag of marbles has 1 red, 1 green, and 3 yellow marbles, what is the probability of selecting a yellow and then a yellow without replacement?
The probability of selecting a yellow and then a yellow without replacement is 3/10.
What is probability?It is the chance of an event to occur from a total number of outcomes.
The formula for probability is given as:
Probability = Number of required events / Total number of outcomes.
We have,
Number of red marbles = 1
Number of green marbles = 1
Number of yellow marbles = 3
Total number of marbles = 5
The probability of selecting a yellow and then a yellow without replacement.
= 3/5 x 2/4
= 6/20
= 3/10
We are using 2/4 since yellow marbles become 2 and the total marbles become 4 when the condition of without replacement is given.
Thus,
The required probability is 3/10.
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Each year, a physicist measures the remaining radioactivity in a sample. She finds that it reduces by 18% each year. If there was 1.52 g of radioactive material left after 4 years: a. Find the initial quantity of radioactive material.
b. How many more years will it take for the amount of radioactive material to reduce to 0.2 g?
It will take an additional 7.15 years for the amount of radioactive material to reduce to 0.2 g.
Now, According to the question:
"Information available from the question"
A physicist measures the remaining radioactivity in a sample.
She finds that it reduces by 18% each year.
If there was 1.52 g of radioactive material left after 4 years.
In order to find the initial quality of radioactive material, we will use the formula:
Initial Quality = Final Quantity * (1 - Reduction Rate)^Years
We know that -
The final Quantity is 1.52 g, the reduction rate is 18% (or 0.18), and the number of years is 4.
Initial Quantity = 1.52 g × [tex](1-0.18)^4[/tex]
Initial Quantity = 1.52 g × 0.452
Initial Quantity = 0.68 g
Hence, the initial quantity of the radioactive material is 0.68 g.
b. In order to find how many more years it will take for the amount of radioactive material to reduce to 0.2 g, we will use the formula:
Years = log(Final Quality / Initial Quality) / log(1 - Reduction Rate)
We know that -
the final quality is 0.2 g, the initial quality is 0.68 g, and the reduction rate is 18% (or 0.18).
Years = log(0.2 / 0.0.68) / log(1 - 0.18)
Years = 7.15
Therefore, it will take an additional 7.15 years for the amount of radioactive material to reduce to 0.2 g.
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) b. estimate the circumference, in centimeters, of a circle with a diameter of 4.50 cm. circumference (cm) 14.2 saved (1pts) c. estimate the diameter, in centimeters, of a circle with a circumference of 3.94 inches. diameter (cm)
The circumference of the circle with the diagram of 2.25 cm is 14.13 cm.
What is circumference?The circumference, also known as the length of a circle, is its circumference. By using the radius or diameter, we can calculate the circumference of a circle.
An irregular plane figure is a circle. Every point on the circle is equally distant from the circle's fixed centre. It has a radius of 1, making it a 2D shape. The Latin word "circulus," which means "small ring," is the source of the English word "circle."
Given that the diameter of the circle is 4.50 cm. The circumference of the circle is calculated as:-
C = 2πr
C = 2 x π x 2.25
C = 14.13 cm
Therefore, the circumference of the circle with the diagram of 2.25 cm is 14.13 cm.
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Tell whether the fractions are equivalent. Write equal or not equal. 2/3 and 4/10 5/6 and 10/12 1/4 and 4/8
the numerical value of the standard deviation can never be positive, true or false?
Answer:
False - The standard deviation is always positive.
You have been asked to find the value of f(-5) for the function
f(x)=3x2 -2x+5
Which of the following options is NOT a possible way to evaluate that function and find the correct answer?
A. Substitute (-5) wherever there is an x and solve using a calculator
B. Graph the equation and look at the table to find the y-value when x=-5
C. Graph the equation and find the y-value of the ordered pair when x=-5
D. See what x is when y=-5
The option D. See what x is when y = -5 is not a possible way to evaluate the value of f(-5).
What is Function?A function is a relation from a set A to a set B where the elements in set A only maps to one and only one image in set B. No elements in set A has more than one image in set B.
The given function is f(x) = 3x² - 2x + 5.
f(-5) is actually the value of y or f(x) when x = -5.
By substituting -5 in place of x of the function, we will get f(-5).
Also we can find the value of f(-5) by graphing the function and finding the y value corresponding to the x value of -5.
Hence the way that is not possible is option D.
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The volume of a gas was measured as its temperature was increased from 10 K to 15 K at intervals of 1 K. The volumes were 1. 5, 2. 2, 3. 38, 5. 1, and 7. 6 cm3. Would a linear or exponential function better approximate the data described? Explain why
A linear function would better approximate the data.
A linear function would better approximate the data described. This is because a linear function has a constant rate of change, while an exponential function has a changing rate of change. For example, if we take the data from 10 K to 15 K, we can calculate the rate of change for each 1 K increase in temperature. The rate of change of volume for a 1 K increase in temperature is calculated by taking the difference between the volumes at the two temperatures and dividing by the difference in the temperatures. With the given data, this would yield a rate of change of 0.7 cm3/K, 0.38 cm3/K, 0.92 cm3/K, 1.4 cm3/K, and 1.6 cm3/K. As we can see, the rate of change does not remain constant, but increases over the temperature range, indicating a nonlinear relationship. Therefore, a linear function would better approximate the data.
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Write an expression that includes multiplication to show how to find the total amount of the plant growth in inches. then slove your expression.
Answer:
Step-by-step explanation:
Add, Added to, the sum of, more than, increased by, the total of, plus. +. Add x to y x + y y added to 7.
Jenny has ten chickens that lay eggs every day. She wants to give away
her extra eggs to her neighbors, but she wants to give each neighbor an
equal number of eggs. She figures out that she needs to give 7 of her
neighbors eggs for them to get the same amount, otherwise there is one
egg left over. What is the smallest number of eggs she needs for this
situation to be true?
Answer: 14 eggs
Step-by-step explanation: Hello!
You know that there are 10 chickens that lay eggs every day. There are 7 neighbors that she needs to give eggs to so that they each get the same amount otherwise there is one egg left over. We know that each chicken must produce at least one egg per day, meaning that the bare minimum amount of eggs per day is 10. Let's try 10.
10/7 = 1 and 3/7. This means that there would be 3 eggs remaining. This is not possible. Let's try 11.
11/7 = 1 and 4/7. This means there would be 4 eggs remaining. Let's try 14.
14/7 = 2. This is the smallest number of eggs for each neighbor to get the same amount of eggs each per day (2). The smallest number of eggs she needs in total is 14.
12. Mary and Jenny worked in a bookstore during the summer. Because of the experience, Mary's pay is 20% more than Jenny's. Last week, Mary worked for 30 hours and Jenny worked for 25 hours. Together they made $610. What are Mary's and Jenny's hourly rates?
Answer:
Let x be Jenny's hourly rate. Then Mary's hourly rate is x + 0.2x = 1.2x.
The total amount of money they earned for the hours they worked is the same, so we can set up the equation:
30x + 25(1.2x) = 610
Expanding the second term and solving for x:
30x + 30x = 610
60x = 610
x = 10.17
So Jenny's hourly rate is $10.17 and Mary's hourly rate is $12.20.
You have two coupons for your favorite store. One coupon takes $100 off your purchase. The amount you spend after using this coupon can be represented by the function f ( x ) = x - 100 where x represents the initial cost of your purchase. The other coupon takes 30% off your purchase. The amount you spend after using this coupon can be represented by the function g ( x ) = 0 . 7 x where x represents the initial cost of your purchase. You want to use both coupons at once so the store decides to first take $100 off your purchase, then take 30% off your purchase. Write a function h ( x ) , in terms of the initial cost of your purchase, x , which represents the amount you will spend after both coupons are applied.
Work Shown:
x = initial cost before any discounts
x-100 = cost after taking off $100
0.7(x-100) = cost after taking 30% off from the previous value
Therefore, we end up with h(x) = 0.7(x-100)
Optionally you could distribute to get h(x) = 0.7x-70, but I think the first version of this is a bit more descriptive.
how ot see how fast membership is incresing initially calculus
The first derivative will give the slope of the function.
The second derivative will give you the point at which the function is increasing or decreasing the most rapidly.
If the 3rd derivative is negative, the rate of increase at the 2nd derivative point will be maximum; if positive, it will be a minimum.
A function's varied rate of change with respect to an independent variable is referred to as a derivative. When there is a variable quantity and the rate of change is irregular, the derivative is most frequently utilized. The derivative is used to assess how sensitive a dependent variable is to an independent variable (independent variable).
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