The perimeter of a semicircle is 15.42 kilometers. what is the semicircle's radius?

What is [tex] {7}^{98 + \sqrt{4} } - 3 \times (64 \div 2 + 4 - 36) \times a = a + 36[/tex]?

A. what is the area of the base? use complete sentences to explain your reasoning. b. what is the volume of the prism? use complete sentences to explain your reasoning.

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?