Elaine bought 11 feet 8 inches of fancy ribbon for $392. The spool was stained and some length of
the ribbon was soiled and not usable. She quickly
sold the remaining ribbon to George at a per-inch
price of 3/7 higher than she paid for it. Altogether,
she made a profit of $28. What percentage of the
ribbon was soiled?

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 =