Find the area of the circle r= 7

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

What is 140% of 25? because i need