What is the coefficient if the c-term of the algebraic expression 14a-72r-c-34d?

1 is the coefficient when the variable is by itself the coefficient is understood to be 1

It's just c, and anything that's a letter has a coefficient of one so it's 1.

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!