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charle [14.2K]
2 years ago
13

Last question on my test! please show some sort of work so i know its correct :) thanks! - dusty.

Mathematics
1 answer:
olga nikolaevna [1]2 years ago
5 0

Answer:

this was 3 minutes ago... you still need the answer?

Step-by-step explanation:

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HELP WITH THIS QUESTION PLEASE!
belka [17]

Answer:

23.7°

9.1~ft

Step-by-step explanation:

Formula for the area of a sector of central angle n (in degrees) and radius r:

A = \dfrac{n}{360^\circ}\pi r^2

We have:

A = 100 ft^2

r = 22 ft

We need to find:

r

100 = \dfrac{n}{360^\circ}\pi (22^2)

n = 23.7^\circ

The central angle measures 23.7°.

Formula for the length of an arcs of a circle with central angle n (in degrees) and radius r:

s = \dfrac{n}{360^\circ}2 \pi r

We have:

n = 23.7°

r = 22 ft

We need to find:

s

s = \dfrac{74.4}{360}2 \pi (22 ft)

s = 9.1~ft

6 0
3 years ago
The mean score on a set of 16 tests is 90. What’s the sum of all the test scores?
Anettt [7]
It should be 90 because in question it says that
7 0
3 years ago
How do I write an equation that would allow someone to find the value of R
Ivahew [28]

Answer:

R+239=3501

Step-by-step explanation:

Add the three 1,167 values together and you get 3,501. Then, because we know a portion of the three blocks is equal to 239, add it so when we solve for R, 239 is subtracted from the total.

As for solving it,

Subtract 239 on both sides, and R is 3501-239 = <u>3262</u>

6 0
3 years ago
If p = .8 and n = 50, then we can conclude that the sampling distribution of pˆ is approximately a normal distribution
FrozenT [24]

Answer:

Yes we can conclude.

Step-by-step explanation:

The sampling distribution of \hat{p} can be approximated as a Normal Distribution only if:

np and nq are both equal to or greater than 10. i.e.

  • np ≥ 10
  • nq ≥ 10

Both of these conditions must be met in order to approximate the sampling distribution of \hat{p} as Normal Distribution.

From the given data:

n = 50

p = 0.80

q = 1 - p = 1 - 0.80 = 0.20

np = 50(0.80) = 40

nq = 50(0.20) = 10

This  means the conditions that np and nq must be equal to or greater than 10 is being satisfied. So, we can conclude that the sampling distribution of pˆ is approximately a normal distribution

6 0
3 years ago
Aluminum gold is 22% aluminum; the rest is gold. If aluminum gold bar contains 55g of aluminum, how many grams of gold does it c
Katarina [22]
195 grams 55/250=.22% 250-55=195g gold
7 0
3 years ago
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