An actor invested some money at 5% simple interest, and $41,000 more than four times the amount at 9%. The total annual interest earned from the investment was $35,260. How do I find how much he invested at 5% and 9%?

Explanation:

The hint pretty much gives away the entire answer. You just need to compute and you should get 96 cm^3

The portion represents the area of the triangular face (it has base = 6 and height = 4). Recall that base*height/2 is the area of any triangle. The area of the triangle is (4*6)/2 = 24/2 = 12 cm^2.

Once you know the base face area, you multiply that by the depth of the prism which is 8 cm. So we get 12*8 = 96 cm^3