Aball is thrown upward with an initial velocity of 96 ft/sec from a height 640 ft. its height h, in feet, after t seconds is given by h(t)=−16t^2 +96t +640. after how long will the ball reach the ground?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

What is the equation of a line passing through (-6,5) and having a slope of 1/3

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?