the only zero that matters is the one before the 9. so, if it was 8.009, ts smaller by one thousandth. if i had 8.09<u>000000000</u>, all the underlined zeros would mean nothing because they arent anything. they are the absence of a value.
Since the cost must be no more than 387$, you can substitute that number instead of y to get 387 = 0.002x - 0.30. you can add 0.30 to both sides to get 387.3 = 0.002x
Then you can divide both sides by 0.002 to get 387.3/0.002 = 193650
