12. Brendan has $65 worth of balloons and flowers delivered to his mother. He pays the bill plus an 8.5% sales tax and an 18% tip on the total cost including tax. He also pays a $10 delivery fee that is charged after the tax and tip. How much change does he receive if he pays with two $50 bills? Round to the nearest cent.

The first octant inside the cylinder x2 + y2 = 16 and below the plane z = 3. 2 sketch the solid whose volume is given by the integral. ∫ π/2. 0. ∫ 2. 0. ∫ 9−r2. 0 r dz dr dθ, and evaluate the integral. 3 use spherical coordinates to evaluate. ∫∫∫. e z dv , where e lies between the spheres x2+y2+z2 = 1 and x2 + y2 + z2 = 4 in