9. The number of hours that the employees at the local Fry's grocery store worked last week is
normally distributed with a mean of 28 hours and a standard deviation of 4. What
percentage of employees worked between 24 and 36 hours?

Answer this 30 points and brainliest!

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244