You know that if 15÷3=5 then 5×3=15. if you know that 7÷8=7/8, what can you conclued about the product of 7/8 and 8

How many days was the temperature above 90 degrees?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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 =