What are two ways to evaluate the logarithmic expression log3 81?

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)