Question

Please help me and only answer if you are 100% sure it is correct, it affects my grade. I will mark you brainly if you get it right. NO LINKS.

Answer 1

Answer:

Part A: 642

Part B: 45.6

Step-by-step explanation:

Part A

So this circle's area is:

20*20*2.14

= 856

Then subtract the 1/4 remainder.

That is:

856/4

= 214

So the area is 856 - 214

= 642

The answer for part A should be 642.

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Part B

So this circle's perimeter is:

20*2*2.14

= 85.6

Cut the right triangle, that is: 20+20

= 40

So the perimeter is 85.6 - 40

= 45.6

The answer for part B should be 45.6

Wow, that was my craziest explanation.

I hope this helps, and get a BETTER GRADE THIS TIME! :D

Answer 2

Answer:

1256, 125.6 (this is wrong sorry i didn't know that it wasn't a full circle)

Step-by-step explanation:

A) The area that the sprinkler is spraying is in a circle with a radius of 20 ft. The formula to find the area of a circle is pi*r^2, so the area of this circle will be 400pi (substitute 20 for r). Pi in this problem is 3.14, so 400*3.14 is 1256 feet.

B) The perimeter of the spray is technically just the circumference of the circle. The circumference is 2r*pi, so we substitute 20 for r again and we get 40pi. Again, pi is 3.14 in this problem, so 40*3.14 is 125.6 feet.