Jack estimates that the cost per mile, in dollars, for operating a certain truck is between 15% and 21% of the number of miles d
riven. This is shown by the system of inequalities below, where x represents the number of miles driven and y represents the cost of operating the truck. y ≥ 0.15x
y ≤ 0.21x
Based on this information, which statement is true?
A) If Jack drives over 15 miles, it will cost 15 · 0.15 to operate the truck.
B) If Jack drives less than 21 miles, it will cost 21 · 0.21 to operate the truck.
C) If Jack drives the truck 100 miles, it will cost either $15 or $21.
D) If Jack drives 200 miles, it will cost anywhere between $30 and $42.
D) If Jack drives 200 miles, it will cost anywhere between $30 and $42
Step-by-step explanation:
The cost is said to be a range of possibilities. The first three answer choices seem to assume the cost is at one extreme or the other. They incorrectly interpret the statement of cost.
