PLEASE HELP! The mean life expectancy of a mosquito is 14 days. We believe the true mean is less than 14 days and plan a hypothesis test at the 5% significance level on a random sample of 60 of these mosquitoes. If the alternative hypothesis is correct, for which of the following values of mu is the power of the test greatest?

mu = 9
mu = 7
mu = 10
mu = 14
mu = 18

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Which graph represents the given linear function 4x+2y=3