Amanager has 2500 kg of sand delivered to a construction site everyday.
about how many tons of sand does he have delivered to the site after 4 weeks?
1 ton = 907.2 kg

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 =