hello!!

ive got two maths problems and am pretty unsure on both of them so if anyone is bored or wanting to help, it would go a long way

the first is: evaluate the following intergral, whereRis the region of the plane satisfying 0<x2+y2<aand the second is: evaluate the intergral

double intergation sign (1+x/a)dA

double intergration sign with a infinity sign on the top and a 0 on the bottom with (e^-x^2 dx)

so the second is like a power to a power thing

i think that the first is polar coordinates but i am not sure!