4.
Keith uses this formula to calculate the monthly
profit of his bicycle store.
P = 400n - 7,200
In the formula, P is the monthly profit and n is
the number of bicycles sold in a month. How
many bicycles must he sell to make a profit of
exactly $2,000 in a month?
A. 13 bicycles
B.
17 bicycles
C. 23 bicycles
D. 25 bicycles