What is the volume of the following rectangular prism pls help me I’m being timed

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

Ithink i know it but i want to be sure so can you me out ?

What is the measure of angle x? 37° 82° x°