A disk of radius 5 cm has density of 10 gm/cm^3 at its center, density of 0 at its edge and the function of its density is linear function of the distance from the center. Find the mass of the disk.

Would my function be (10 - r) r dr dtheta?

I am going from 0 to 2pi and from -5 to 5 Is this correct?

THanks again for all the help this site's members have given to me. Frostking