The height h(t) , in feet, of a snowboarder t seconds after beginning a certain jump can be approximated by h(t) = -16t^2 +22.9t + 9. If the snowboarder lands at a point that is 4 feet below the base of the jump, determine the airtime (the time the snow boarder is in the air) for this jump. Round to the nearest tenth of a second.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false

You are a male who just graduated from college with a bachelor's degree. you have a job paying $50,780.00/yr. a. how does your salary compare to the yearly median earnings for a male with a bachelor's degree? b. what is the difference between the yearly median earnings for a male with a bachelor's degree compared to a male who does not attend college after earning a high school diploma?