Find a fraction between 3/4 and 4/5

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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 =

Find the maximum value of p= 4x + 5y subject to the following constraints :