Multivariable calculus

1. Derive the volume of sphere by setting up a double integral on the function 2: = Wang 1:2 y? where r is a constant. Note that the function 2: = f(:1:, y] will graph a hemisphere with radius 1". You don't have the integrate if you don't want to. 2. Choose 23 integrals to evaluate: (a) f] 332 3:312 dA where R is the triangle bounded by y 2 any = R 2x and a: = 2