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inysia [295]
3 years ago
10

What is the diameter of this circle? A) 2 cm B) 3.14 cm C) 4 cm D) 8 cm

Mathematics
1 answer:
Verizon [17]3 years ago
5 0

Answer:

The answer is c

Step-by-step explanation:

Well, since the Circle is 8cm you can divide the circle by two to get 4

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When X=5 and y=10 in the formula A =xy-20. Find A​
Delicious77 [7]

Answer:

A = 30

Step-by-step explanation:

x = 5

y = 10

A = xy - 20

substitute 5 and 10 in the place of x and y

(5*10) - 20

50 - 20

30

A = 30

3 0
3 years ago
Please answer. I have a couple more questions, and if you're willing to answer them please pm me!
mr_godi [17]
The probability is 0.46
8 0
3 years ago
A music industry researcher wants to estimate, with a 90% confidence level, the proportion of young urban people (ages 21 to 35
Maslowich

Answer:

1,539

Step-by-step explanation:

Using Simple Random Sampling in an infinite population (this is such a large population that we do not know the exact number) we have that the sample size should be the nearest integer to

\large \frac{Z^2pq}{e^2}

where

<em>Z= the z-score corresponding to the confidence level, in this case 90%, so Z=1.645 (this means that the area under the Normal N(0,1) between [-1.645,1.645] is 90%=0.9) </em>

<em>p= the proportion of young urban people (ages 21 to 35 years) who go to at least 3 concerts a year= 35% = 0.35 </em>

<em>q = 1-p = 0.65 </em>

<em>e = the error proportion = 2% = 0.02 </em>

Making the calculations

\large \frac{Z^2pq}{e^2}=\frac{(1.645)^2*0.35*0.65}{(0.02)^2}=1,539.09

So, the sample size should be 1,539 young urban people (ages 21 to 35 years)

6 0
3 years ago
John and Liz are sharing a large pizza. John ate 2/3 of the pizza, and Liz ate 1/4 of the pizza. How much of the pizza is left?
Mkey [24]
Add what they ate
2/3 + 1/4 =
11/12
Then subtract that from the whole pizza
12/12 - 11/12 = 
1/12
1/12 of the pizza is left
7 0
3 years ago
PLEASE HELP 30 POINTS TO WHOEVER HELPS I NEED IT QUICK PLEASE HELP
Brut [27]

Answer:

Hi there!

The correct answer is:

a. 27831.05

Step-by-step explanation:

Since they gave you the equation for the line of best fit: y = 1.9x + 21

a. solve for x: 52900= 1.9x + 21

minus 21 on both sides to get 1.9x = 52879

then divide 1.9 on both sides to get x= 27831.05

3 0
3 years ago
Read 2 more answers
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