Of 30 boxes 2 contain blue plates, what is the probability of picking a blue box at random

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

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 =

How do you write something in scientific notation?