What is the surface area of a pyramid thr side lenghths of the base are equal 7 is the base 5 is the side length

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?