Jim needs to rent a car. A rental company charges $21.00 per day to rent a car and $0.10 for every mile driven.
He will travel 250 miles.
He has $115.00 to spend.
Write an inequality that can be used to determine d, the maximum number of days that Jim can rent a car. Jim believes the maximum whole number of days he can rent the car is 5. Is he correct? Why or why not?
daily cost + mileage cost = total cost 21d + 250(0.1) = 21d + 25 Since he only has $115.00 to spend, 21d + 25 ≤ 115 21d ≤ 90 d ≤ 42⁄7
Jim is not correct. If he rents the car for 5 days, the cost will be 21(5) + 250(0.1) = $130 which is more than the $115 he has to spend.
