Suppose that a normal model described student scores in a history class. parker has a standardized score (z-score) of +2.5. this means that parker's score is 0 is 2.5 points above the class average
0 is 2.5 standard deviation above the class average
0 has a standard deviation of 2.5
0 is 2.5 times the class average

80 the answer is 80

step-by-step explanation:

sounds & other waves originate from any vibrating object

all you should have to do is insert 1 where the c is, representing that one car is sold.

f(c) = 250c + 500

f(1) = 250(1) + 500

f(1) = 250 + 500

f(1) = 750

he earns $750 for each car sold.

hope this you! have a happy , here's a turkey!