A large spinning wheel has 20 pie slices of different colors. There are 8 green slices, 5 red slices, and the rest are black. If you spin the wheel and the pointer stops at green you win $2, stops at red you win $5, stops at black you win nothing. If you are charged $3 to play this game then how much is the expected value if you played 10 times?

In the past, professional baseball was played at the astrodome in houston, texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t2 + 45t + 1. will a baseball hit straight up with this velocity hit the roof of the astrodome? use the discriminant to explain your answer.

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

Anyone know these questions? i need ,.