Which value must be added to the expression x^2 +16x to make it perfect-square trinomial?

a-8

b-32

c-64

d-256

edit: it’s not a

the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.