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3 years ago

Math Help! Please explain your answer and thanks in advance! (The question is the image attached!)

Mathematics

1 answer:

N76 [4]3 years ago

5 0

This is a maybe. Im not sure if this is right but its what I got.

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If you can help please do it’s urgent

Marta_Voda [28]

-216 is the right answer!

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3 years ago

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How do you get diameter from radius

natima [27]

A diameter is simply twice the radius.

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3 years ago

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The annual fixed costs of owning a small sedan are $4407, assuming the car is completely paid for. The cost to drive the car is

vodomira [7]

Answer:

y(Cost)=.17x(x=miles)+4407

y=.17x+4407

Step-by-step explanation:

The cost of the vehicle is 4407$ fixed, with .17$ per mile. A liner equation, y=mx+b can be substituted with m being the cost per mile and 4407$ being the fixed annual value. Y is the total Cost of everything.

7 0

2 years ago

4. Is rap music more popular among young Indians than among young Asians? A sample survey compared 634 randomly chosen Indians a

bulgar [2K]

Answer:

H0 is accepted

there is no difference between the proportions of Indian and Asian young people who listen to rap music every day.

Step-by-step explanation:

Given a sample survey compared 634 randomly chosen Indians aged 15 to 25 with 567 randomly selected Asians in the same age group.

$p_{1} = \frac{368}{634} =0.580$

It found that 368 of the Indians and 130 Asians listened to rap music every day.

$p_{2} = \frac{130}{567} =0.229$

Null hypothesis H0: there is no difference between the proportions of Indian and Asian young people who listen to rap every day.

$p_{1} = p_{2}$

Alternative hypothesis:- $p_{1} \neq p_{2}$

Level of significance α = 0.05

The test of statistic

$z = \frac{p_{1} - p_{2}}{\sqrt{pq(\frac{1}{n_{1} }+\frac{1}{n_{2} }) } } }$

where $p = \frac{n_{1}p_{1} + n_{1}p_{2}}{n_{1}+n_{2}} = \frac{634(0.580)+567(0.229)}{634+567}$

p = 0.414

and q = 1-p = 1- 0.414 =0.586

$Z = \frac{0.580-0.229}{\sqrt{0.414(0.586)(\frac{1}{634} +\frac{1}{567} } } }$

on calculation , we get

z = 0.300 ><1.96 at 95 % level of significance

H0 is accepted

there is no difference between the proportions of Indian and Asian young people who listen to rap every day.

3 0

3 years ago

Find a parametric representation for the surface. The part of the plane z = x + 3 that lies inside the cylinder x2 + y2 = 9. (En

Nataly [62]

You can use

$x=u\cos v$

$y=u\sin v$

$z=u\cos v+3$

with $0\le u\le3$ and $0\le v\le2\pi$ .

5 0

3 years ago