Please help me on this quiz! my mom has cancer and I do not have the time to do it, but I really need the college credit! I will rate you really generously! please show work in your answer ❤️

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?