Kyle and his three friends are all saving money to go on a trip. They each have $20 saved. How much money will they each need to save in order to have at least $400 in all to go on a trip?

Can someone me with these two circle theorem questions asap?

3/4 = c/36 i need with this fraction proble.

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)