He has three pieces of ropes with length of 140 cm,168 cm and 210 cm. he wishes to cut all three pieces of ropes into smaller pieces of equal length such that there is no left over
i ) what is the greatest possible length of each of the smaller pieces of ropes?

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 =