What is the surface area? How did you find it(filled-in formula)?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

A. what is the area of the base? use complete sentences to explain your reasoning. b. what is the volume of the prism? use complete sentences to explain your reasoning.