Least common denominator 7/40 and 1/30

5(-9w) put expression in distributive property

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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 =