As a retiring employee, Khadijah receives 5% of her average teaching salary for the last five years she worked. She receives this salary for every year of employment with the company.
Khadijah plans on retiring after 15 years with the school system and then start her own
Corporation. Her salaries for the last five years are $65,000, $70,000, $82,000, $83,000, and
$88,500. Calculate Khadijah's total retirement salary for 15 years.

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:

Factor the polynomial. b^2 + 4b + 4

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?