What is the distance from the origin to point P graphed on the complex plane below?
Answers
Answer:
hereeeeeeeeeeee
Related Questions
A consumer group has determined that the distribution of life spans for gas ranges (stoves) has a mean of 15.0 years and a standard deviation of 4.2 years. The distribution of life spans for electric ranges has a mean of 13.4 years and a standard deviation of 3.7 years. Both distributions are moderately skewed to the right. Suppose we take a simple random sample of 35 gas ranges and a second SRS of 40 electric ranges. Which of the following best describes the sampling distribution of the difference in mean life span of gas ranges and electric ranges?
a. Mean = 1.6 years, standard deviation = 7.9 years, shape: moderately right-skewed.
b. Mean = 1.6 years, standard deviation - 0.92 years, shape: approximately Normal.
c. Mean= 1.6 years, standard deviation = 0.92 years, shape: moderately right skewed.
d. Mean =1.6 years, standard deviation =0.40 years, shape: approximately Normal.
e. Mean =1.6 years, standard deviation =0.40 years, shape: moderately right skewed.
Answers
Answer:
b. Mean = 1.6 years, standard deviation - 0.92 years, shape: approximately Normal.
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Subtraction of normal Variables:
When we subtract normal variables, the mean is the subtraction of the means, while the standard deviation is the square root of the sum of the variances.
A consumer group has determined that the distribution of life spans for gas ranges (stoves) has a mean of 15.0 years and a standard deviation of 4.2 years. Sample of 35:
This means that:
[tex]\mu_G = 15[/tex]
[tex]s_G = \frac{4.2}{\sqrt{35}} = 0.71[/tex]
The distribution of life spans for electric ranges has a mean of 13.4 years and a standard deviation of 3.7 years. Sample of 40:
This means that:
[tex]\mu_E = 13.4[/tex]
[tex]s_E = \frac{3.7}{\sqrt{40}} = 0.585[/tex]
Which of the following best describes the sampling distribution of the difference in mean life span of gas ranges and electric ranges?
Shape is approximately normal.
Mean:
[tex]\mu = \mu_G - \mu_E = 15 - 13.4 = 1.6[/tex]
Standard deviation:
[tex]s = \sqrt{s_G^2+s_E^2} = \sqrt{0.71^2+0.585^2} = 0.92[/tex]
So the correct answer is given by option b.
Dina started swimming at 3:33 P.M. She swam until 4:31 P.M. How long did Dina swim?
Answers
Answer:
1 hour and 38 minutes
or 98 minutes
Step-by-step explanation:
subtract
4:31-3:31=98 minutes
98-60=38 minutes
= 1 hour and 38 minutes
or
+98 minutes
Solve for n
56 = -4n
a. 60
b. -4
c. -14
d. 224
Answers
HELP
Pre-algebra
Not understanding :/
Answers
The difference of a number and 8 is -15
Answers
Answer:
-7
Step-by-step explanation:
x-8=-15
x=-7
If f(x) = x + 2x - 3, what is the value of f(1 + 2)?
Answers
Answer:
6
Explanation:
substituting- f(x)= (1+2) + 2(1+2) -3
3 + 2(3)-3
3+6-3
=6
HOPE IT HELPS
what is the domain of the function y=2 square root x-6
Answers
Answer:
6 ≤ x < ∞
Step-by-step explanation:
interval notation: [6, ∞)
set builder notation: {x|x ≥ 6}
Benita observed that 28 out of 55 patrons at the public library used the computer. The librarian told Benita that 660 patrons enter the library throughout the day. Based on Benita's observations, how many patrons during the day would be expected to use the computer?
Answers
Answer:
336
Step-by-step explanation:
5. What is the volume of the right triangular prism?
12 m
A. 64 m
B. 128 m
C. 192 m®
D. 384 m
4 m
8 m
Answers
V = 0.5 • 12 • 8 • 4 = 192
6. G
V = (1/3) 6x^2 • 6 • 8 = 96x^2
A pair of Nike's that originally cost $90 are on sale. The sale price is $67.50. What is the discount expressed as percent change?
Answers
Answer:
It is a 25 percent discount
I say this because 90/67.5 equals 75 and 25 + 75 equals what... 100
Answer:
75% off
Step-by-step explanation:
90*.75=67.50
SOMEONE PLEASE EXPLAIN THIS TO ME
Answers
17.5 = x
Step-by-step explanation:
1st you add 85 and 55 since those to angles are congruent (means similar) to 8x
2nd you get 140 after adding then
3rd since the angles are congruent you just divide the 140 by 8 to get the value of x
Ahmed buys a house for £179500
A year later he sells the house for £190 270
Calculate the percentage profit Ahmed makes.
I
Total mar
Answers
Answer: 6% of profit
Step-by-step explanation:
Find the % of profit
179 500 / 190 270 ≈ 0,94 = 94 %
100% - 94% = 6%
PLEASE HELP ME WITH THIS MATH PROBLEM
w−15=−4
Answers
Answer:
w = 11
Step-by-step explanation:
add 15 to each side of the equation
w = 15 + (-4)
w = 11
Answer: w=11
Step-by-step explanation:
24) Identify the binomials
a) 100
c) al-a+ba
b) x+y-xy
d) z2+z
Answers
Answer:
b
Step-by-step explanation:
Your well wisher
Hope it will be helpful
A square pyramid has a base with a side length of 6 inches and lateral faces with heights of 11 inches. What is the surface area of the pyramid?
Answers
Answer:
[tex]\huge\boxed{\sf 168\ in.\²}[/tex]
Step-by-step explanation:
Surface area of the base:
= Length * Length
= 6 * 6
= 36 in.²
Surface Area of 1 Lateral Face:
= [tex]\sf \frac{1}{2} (Base * Height)[/tex]
Base = 6 inches
Height = 11 inches
= 1/2 (6*11)
= 3 * 11
= 33 in.²
Surface Area of 4 lateral faces:
= 33 * 4
= 132 in.²
Surface Area of the whole pyramid:
= 132 + 36
= 168 in.²
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807Answer:
SA = 168 in.²
Step-by-step explanation:
The surface area is the sum of the area of the base and the areas of the 4 congruent triangular sides.
s = side of the base
h = height of each side
SA = s² + 4(sh/2)
SA = (6 in.)² + 4(6 in.)(11 in.)/2
SA = 36 in.² + 132 in.²
SA = 168 in.²
does 5+4=8 and does 1+1=2
Answers
Answer:
5+4=9
and the second one is right
Step-by-step explanation:
;)
Answer:
the first one is incorrect but the second one is correct!
Step-by-step explanation:
5 + 4 = 9
if you have 5 apples and you want to add 4 more
5 + 1 + 1 + 1 + 1 = 9
What is the area of the triangle? Use the formula: Area of a triangle = 1/2bh.How do you find the area of a triangle?
Answers
9514 1404 393
Answer:
4 square inches
Step-by-step explanation:
The only triangle in the figure is 4 in wide and 2 in high. Using these values in the given formula, we find the area to be ...
A = 1/2bh
A = (1/2)(4 in)(2 in) = 4 in²
The area of the triangle is 4 square inches.
Answer:
4 sq in
Step-by-step explanation:
the height of the triangle is 2 inches 2 x 4 = 8 8/2 =4
use elimination metho to solve the system of equations
Answers
Answer:
There are infinitely many solutions.
Step-by-step explanation:
3x + 2y = 7
-9x - 6y = -21
Now multiply the first equation by 3
3 × 3x + 2y = 7 ➡ 9x + 6y = 21 Now subtract second equation from first equation
9x + 6y - 9x - 6y = 21 - 21
0 = 0
The equation has infinitely many solutions meaning whatever value you write instead of x and y there will be solution.
No way you guys answer this correctly 0_0.
Answers
Answer:
C = 37.7
r = 6
Length - 0.740
Ok thanks for the points!
Which of the figures appear to be
congruent?
Answers
II and II
They are very similar.
Hope that helps:)
Factorise
5 x y + 5 x + 4 y + 4
Answers
Answer:
5 x y + 5 x + 4 y + 4
5x(y+1)+4(y+1)
(y+1)(5x+4)
12+16q-q and q=2 evaluate
Answers
Answer:q=0,\:q=-16
Step-by-step explanation:
a rectangle prism has a volume of x^3 + 6x^2 - 7x - 60. If the height of the prism is x + 4, the dimensions of the base are
Answers
= 10x^3 + 46x^2 - 21x - 27 / 2x^2 + 8x - 9
10x^3 / 2x^2 = 5x so the first term in the answer will be 5x
Charles wanted to graph the amount of sugar (in teaspoons) used in cups of coffee at a schoolevent. He used the coffee and sugar usage table to make the graph below
( will give brainliest if you help)
Answers
Answer:
Its a
Step-by-step explanation:
Bobby Hill is taking lady bird to the vet. The bill
is $72 dollars. Lady bird received 3 shots for
$12 each and had to take 2 pills for x amount
each. How much were each pill?
12 = 72 - 12
72 12x + 3x
72 = 36 + 2x
None of the above
Answers
Answer:
72= 36 + 2x
Step-by-step explanation:
1 shot= $12
3 shots= $12×3= $36
$72-$36= $36
2 pills= $36
1 pill= $36/2=$18
x= $18
72= 36 + (2×18)=
36 + 36= 72
A recipe for slime calls for 1/2 cup water and 1/4 cup glue. what is the total amount of liquid need to the recipe?
Answers
Answer:
3/4 is the answer.
Sam drove for 2 hours at 45 mph. He has the same distance remaining. How fast should he drive to make his average speed 60 mph?
Answers
Answer:
Step-by-step explanation:
2 hours at the speed of 45 mph = 90 miles in 2 hours
He should drive 60 miles per hour to make his speed 60 mph.
Divide x2 by x - 1. What is the value of the remainder?
A) 1
B) -1
C) 2
D) o
Answers
Answer:
I think it's B.
Step-by-step explanation:
Divide using polynomial division.
x + 1 + 1/ x − 1.
Maybe not 100% sure.
If a point on a coordinate plane is placed 5 lines to the right and 3 lines up, what would the ordered pair be?
Answers
Answer:
(5,3)
Step-by-step explanation:
A rectangular prism has a length of 7 cm, a width of 4 cm, and a height of 2 1/2cm.
The prism is filled with cubes that have edge lengths of 1/2 cm.
How many cubes are needed to fill the rectangular prism?
Enter your answer in the box.
To fill the rectangular prism,
cubes are needed.
Answers
Answer:
560 cubes
Step-by-step explanation:
Volume of prism: lwh, 7*4*2.5, 70cm!
Volume of cubes: lwh, 0.5*0.5*0.5, 0.125cm!
70cm/0.125cm=560 cubes.
Answer:
560 cubes
Step-by-step explanation:
first solve the volume of the rectangular prism
V = l x w x h
where l is the length
w is the width
h is the height
V = 7 x 4 x 2.5
v = 70 cu cm
then solve the volume of the box
v = e^3
v = 0.5^3
v = 0.125
number of cubes = 70 / 0.125
number of cubes = 560 cubes