What is the radius? (round to the nearest tenth)

The radius can be found with the Pythagorean theorem. Assuming r is the radius, 14²+r²=17². Multiply it out to 196+r²=289. Subtract 196 from both sides and you're left with r²=93. So, r=√93, or about 9.6 to the nearest tenth.

Since the radius of that circle is side AB of the triangle, and the triangle is a right triangle, we can use pythagorean theorem. A (squared) + B (squared) = C (squared. We have one of the legs and the hypotenuse, so we just have to solve for the other leg. 17 squared - 14 squared is 93. The square root of 93 is 9.6. So the radius would be 9.6.

C. 40,320 just did the math right now

He was paid 23 dollars for each lawn