20 !
f(x)=x^2(x+2)(x-2)(x-5)
zeros: x=negative2,x=0,x=2,and x=5

sign of f: negative2
is it positive
negative
or sometimes positive and negative?

answer: your answer is c

step-by-step explanation:

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!