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Shalnov [3]
3 years ago
15

You survey 200 people about the electronics they own. The results show that 33/40 people own a cell phone. Of these people, 10/1

1 also own an MP3 player. what fraction of the people own a cell phone and an MP3 player? How many people own a cell phone, but not an MP3 player? Explain.
Mathematics
1 answer:
guajiro [1.7K]3 years ago
5 0
200 * 33/40 = 165 owns phones
165 * 10/11 = 150 owns phones and MP3 player

Therefore 3/4 owns both and
165 owns only phones
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The area of a circle of radius 10 units is equal to the surface area of a sphere of radius 5 units.
Hoochie [10]
<h3>Answer:  True</h3>

Explanation:

The area of the circle with radius 10 is...

A = pi*r^2

A = pi*10^2

A = 100pi

The surface area of the sphere with radius 5 is...

SA = 4pi*r^2

SA = 4pi*5^2

SA = 100pi

Both results are the same, so the claim is true. We can think of surface area as the amount of wrapping paper needed to cover the sphere.

6 0
2 years ago
The sum of two consecutive odd integers equals 12. What are they? x represents integer x + 2 represents integer
Tamiku [17]

The two integers are 5 and 7

8 0
3 years ago
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Y=1/4 (x+2)(x – 6
gladu [14]
I have no idea I’m answering this because I need to ask more questions
4 0
3 years ago
In a recent survey, 10 percent of the participants rated Pepsi as being "concerned with my health." PepsiCo's response included
hichkok12 [17]

Answer:

The statistic for this case would be given by:

z=\frac{0.18 -0.1}{\sqrt{\frac{0.1(1-0.1)}{100}}}=2.67  

Step-by-step explanation:

Infromation provided

n=100 represent the random sample selected

X=18 represent the people who rates Pepsi as being "concerned with my health"

\hat p=\frac{18}{100}=0.18 estimated proportion of people who rates Pepsi as being "concerned with my health"

p_o=0.1 is the value that reference to compare

z would represent the statistic

Hypothesis to test

For this case we can assume that the interest is check if the proportion of people who rates Pepsi as being "concerned with my health" is equal to 0.1 or not , then the system of hypothesis are:

Null hypothesis:p=0.1  

Alternative hypothesis:p \neq 0.1  

The satistic for this one sample proportion test is given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing the info given we got:

z=\frac{0.18 -0.1}{\sqrt{\frac{0.1(1-0.1)}{100}}}=2.67  

7 0
3 years ago
Gabrielle's age is two times Mikhail's age. The sum of their ages is 45. What is Mikhail's age?
Fittoniya [83]

Answer:Gabrielle is 2*Mikhail:

G = 2M We will use this value for G next

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

G+M = 45 Now in this equation substitute for G, like this:

 

2M+M = 45

3M = 45 Divide both sides by 3

M = 15 This is Mikhail, and the problem says that:

G = 2(15) = 30

Gabrielle is 30 and Mikhail is 15, and 15+30 = 45 just like the problem says

Step-by-step explanation:

6 0
3 years ago
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