Question

Calculate the area of a circle with a radius of 2 cm and a circle with a radius of 4 cm. Leave your answers in terms of pi.

When the radius doubles, does the area of the circle double?
A) 4π cm^2; 8π cm^2; NO
B) 4π cm^2; 16π cm^2; NO
C) 4π cm^2; 16π cm^2; YES
D) 4π cm^2; 8π cm^2; YES

Answer 1

@nuttyliaczar please help

Answer 2

I just showed you how to solve for the area

Answer 3

Solve for the area of a 2cm circle, then again for a 4cm circle and compare the difference

Answer 4

is it b

Answer 5

are you sure ?

Answer 6

I think it is a NO answer

Answer 7

do you think it so or you are sure in this ?

Answer 8

for radius 2 you got area 4pi
for radius 4 you got 16pi

what will be sure your answer than ?

Answer 9

huh??

Answer 10

@I_Ask_Alot you need to be sure,secure in your calculi - ok. ?

Answer 11

@Ask_Alot: Kindly write out the formula for the area of a circle of radius r.

Then apply this formula to finding the areas of circules of radius 2cm and of radius 4cm.