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ASHA 777 [7]
4 years ago
13

Construct and interpret a 95% confidence interval estimate for the difference in the mean number of cell phone calls per month f

or 18-24-year-olds and 45-54-year-olds.
Mathematics
1 answer:
dsp734 years ago
5 0

Answer:

25 per month

Step-by-step explanation:

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QUICK! The radius of a cylindrical construction pipe is 2 ft. If the pipe is 16 ft long, what is its volume?
Alika [10]

Answer:

V=201.06 ft²

Step-by-step explanation:

V=\pir²h

V=\pi2²16

V=64\pi

V=201.06

4 0
3 years ago
Read 2 more answers
HELP PLEASE! FIND THE SURFACE AREA OF PYRAMID
Wittaler [7]

Answer:

136.73972

Step-by-step explanation:

A=lw+l(w

2)2+h2+w(l

2)2+h2=6·5.2+6·(5.2

2)2+92+5.2·(6

2)2+92≈136.73972

6 0
3 years ago
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What is the slope of the line that passes through the points (2,8) and (1, 13)?
r-ruslan [8.4K]

Answer:

The slope is -5

Step-by-step explanation:

8 0
3 years ago
The a question is attached below
Stells [14]

Answer:

22.2m

Step-by-step explanation:

vol of a sphere = 4/3 x pi x r^3

vol of a hemisphere is 1/2 the vol of a sphere, so vol of a hemisphere= 2/3 x pi x r^3

2/3pi x r^3 = 257

Divide both sides by 2/3pi

r^3 = 122.708

Cube root both sides.

r = 11.077

Diameter is twice the radius, so diameter = 22.154m

To the nearest 10th of a meter this is 22.2m.

Hope I helped x

5 0
3 years ago
5. MAPPING Ben and Kate are making a
Rainbow [258]

Answer:

a. 1,000 yards

b. (2, -1)

Step-by-step explanation:

Coordinates of Ben's House = (6, 2)

Coordinates of Kate's House = (-2, -4)

a. Number of yards between Kate and Ben's House using instance formula, d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}.

d = \sqrt{(6 -(-2))^2 + (2 -(-4))^2}

d = \sqrt{(8)^2 + (6)^2}

d = \sqrt{64 + 36}

d = \sqrt{100}

d = 10 units

1 unit = 100 yards

Therefore, 10 units = 1,000 yards.

Kate and Ben's House are 1,000 yards apart.

b. Since Jason's home is halfway between Ben and Kate's House, therefore, Jason's location is the midpoint between Ben and Kate's House. Use the midpoint formula to calculate the coordinates of Jason's location on the map, using (6, 2) and (-2, -4).

M(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2})

Plug in the values

M(\frac{6 +(-2)}{2}, \frac{2 +(-4)}{2})

M(\frac{4}{2}, \frac{-2}{2})

M(2, -1)

6 0
3 years ago
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