Answer:
64n = 4nr2
Step-by-step explanation:
So the formula for the surface area of a sphere is A=4πr^2
Now A= 64n
(im assuming n is supposed to be pi)
so 64n=4πr^2
thus the last one would be correct (also assuming its supposed to be r^2)
Answer: -2
Step-by-step explanation:
f(x) = 2x + 3, g(x) = 3x + 1
(f • g)(-1)=
f(-1)*g(-1)=
(2(-1)+3)*(3(-1)+1)=
(-2+3)(-3+1)=
1*(-2)=-2
Just multiply 0.15 with the price of the item