Circumference of a circle is 40 π cm. A quarter of the circle represents the developer layer genuine coupe. Calculate the surface compartment.

Answers

Answer 1

Answer: we have to find the radius, how can we got it??

$C=2\pi*r$

then

$40\pi=2\pi*r$

$\boxed{r=20~cm}$

A quarter of the circle will have a surface of a quarter of the circle, there fore

this is the surface of the circle

$S=\pi*r^2$

a quarter of it

$S_{(1)/(4)}=(1)/(4)*\pi*r^2$

then we can replace the value of r

$S_{(1)/(4)}=(1)/(4)*\pi*20^2$

$S_{(1)/(4)}=(1)/(4)*\pi*400$

we can simplify

$\boxed{\boxed{S_{(1)/(4)}=100\pi~cm^2}}$

Answer 2

Answer: $2 \pi r=40 \pi \ cm\ \ \ \Rightarrow\ \ \ r= (40 \pi )/(2 \pi ) =20\n\nS= \pi r^2\ \ \ \Rightarrow\ \ \ quarter:\ \ A= (1)/(4) \cdot S= (1)/(4) \cdot \pi \cdot20\cdot20=100 \pi \ [cm^2]$

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Answers

Its a little blurry, but I hope this helps. Lets just say the number on the bottom is 2b, and the one on the side is b. You would have a total of (4)b's, and (2)2b's. Answer: 4b+2(2b). The 4 b because you have 4 sides of that equal length, and the same with the 2b's

Evaluate the expression when p= -24 and q= 4 p/2q48

-48

3

-3

Answers

The answer is -3 because if you plug in the values for the letters you would get -24/2(4)

Once you simplify the expression, you will get -24/8

24/8 is 3 and you take the sign of the larger number which is negative

so your answer is (-3)

Hope i helped

Is 3/4 bigger than 7/8

Answers

3/4 us equivalent to 6/8, which is less than 7/8.

no because 3/4 is 75% and 7/8 is 87.5 @ which makes 7/8 bigger

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Answers

Hey you go to GCA right I know that format cause I take it on my tests at GCA .

a hockey season ticket holder pays $72.48 for her tickets plus $6.00 for a program each game. A second person pays $18.08 for a ticket to every game, but doesn't buy programs. In how many games will they have paid the same amount?

Answers

If I understand the question correct, the hockey season ticket holder paid $72.48 for all of the tickets at once, and then $6.00 for each game thereafter. The second person pays $18.08 for a ticket per game.

So then let g = the number of games. The problem can be written as a system of equations:

Person 1 = 72.48 + 6g
Person 2 = 18.08g

We are looking for when the number of games for both are the same. To do this, just set them equal to each other and solve for g.

72.48 + 6g = 18.08g
Subtract 6g:
72.48 = 12.08g
Divide by 12.08:
g = 6

So after 6 games, the two would have paid the same price.

Increase £168 by 17.5%

Answers

100% = 168

1% = 1.68

17.5% =

1.68 x 17.5 = 29.4

168 + 29.4 = 197.4 which is the increased amount in pounds

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