I really need help with c Somebody answer c please Graces ba

I really need help with c. Somebody answer c please?!?

Grace\'s bakery specializes in giant cupcakes. Each cardboard cupcake container is filled with batter and baked in the oven. The baked cupcake forms a perfect hemispherical of the container. The surface area of this is frosted. A clear plastic lid, identical in size and shape to the cupcake container, is then placed on top. These containers are designed such that R_1 = 3/4R_2 and h = 2R_1. Given that 100cm^3 of batter costs 9c, 100cm^2 of frosting costs 27c, 100 cm^2 of cardboard costs 1.5c, and 100 cm^2 of plastic costs 3c, complete the tasks below on the next page. The following formulas may be helpful: Conical frustum: s = Squareroot(R_2 - R_1)^2 + h^2 SA (sides only) = pi(R_1 + R_2)s V = 1/3pih(R_1^2 + R_1R_2 + R_2^2) Hemisphere: SA = 2pir^2 V = 2/3pir^3 Create functions of R_1 which return the cost, in dollars, of ingredients, I, and packaging, P. Approximate all coefficients to 4 decimal places. Find the volume of a baked cupcake if Grace wants 85% of the cost to go toward integrediants. Round to 2 decimal places. Find the efficiency ratio for the packaging to the baked cupcake, to 2 decimal places.

Solution

To find efficiency we will multiply 1divided by I/P by 100

= 15/85 *100 =17.65 %   answer