What is the volume of the prism

Plz hurry evaluate the expression a+b where a=8 and b=19

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site

Write the equation of the circle centered at (10,-2) with radius 2