Ineed to find all of the degrees, but i'm really confused on how to even start.

Find the value of x. round the length to the nearest tenth

When you find the area of a triangle do you use in. or in2

Fred and gene are hang gliding. fred is 700 feet above the ground and descending at 15 ft/s. gene is decending as shown in the table. interpret the rates of change and initial values of the linear functions in terms of the situations they model. show all work. freds equation is f(x)=-15x+700. ( genes is the table attached)