What is the probability of picking a red, replacing it, and then picking a spade, in a standard 52-card deck?

The quadratic function h(t) = -16.1t^2 + 150 models a balls height, in feet, over time, in seconds, after its dropped from a 15 story building. from what height in feet was the ball dropped?

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours