Question

A(r) is an area function of a circle. Find A(2) when A(r)=3.14r^2

Answer 1

What is Trial and error method..? Solve (0.36x10^-6) x^3 + 0.45x - 3000 by this method.

Answer 2

huh?

Answer 3

replace r with 2 in the equation then calculate :D

Answer 4

is it 6.28?

Answer 5

no...the value of r is squared then it is multiplied by 3.14
what is 2 squared?

Answer 6

4? lol

Answer 7

yeah then multiply it by 3.14 haha

Answer 8

oh wait so its A(r)=3.14r^2
A(2)=3.14(2)^2
2^2=4 *3.14? thats how i do this?

Answer 9

which is is 12.56!!!!!

Answer 10

omg i got it right!!! lmfao thanks!