Which expression is equivalent to 91 + 39? (A) 13(7 + 39)

(B) 3(30 + 13)

(C) 13(7 + 3)

(D) 7(13 + 6)

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!