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.

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Which rule describes the composition of transformations that maps ajkl to aj"k"l"? ro. 900 o to, -2(x, y) to, -20 ro, 900(x, y) ro, 9000 t-2. o(x, y) t-2, 00 ro, 900(x, y)