69. Car Wash Profit The weekly profit, p, in dollars, at Delta
Sonic Car Wash can be estimated by p = 20n – 400,
where n is the number of cars washed in 1 week.
a) Draw a graph of weekly profit versus number of cars
washed for up to and including 100 cars.
b) Use the function to determine the weekly profit if 50
cars are washed.
c) If the weekly profit was $1000, use the function to de-
termine how many cars were washed.

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.