The correct answer is (C).
Getting to the Answer: The total cost of renting the car will be the sum of the rate per day times the number of days and the rate per mile times the number of miles. The car is rented for 5 days at a rate of $30.00 per day, so that portion of the cost is 5 days x $30⁄day = $150. The charge for mileage is given as 28 1/2 cents per mile. The answer choices are stated in dollars, so convert the rate to dollars per mile: 28 1/2 cents⁄1 mile x $1⁄100 cents = $0.285 per mile. The car is driven 350 miles, so the mileage charge is 350 miles x $0.285⁄mile = $99.75. The total rental cost is therefore $150.00 + $99.75 = $249.75.
(A) Incorrect: this is $99.75 + $5, instead of $99.75 + (5 x $30)
(B) Incorrect: this is the result of using $0.0285 per mile for the mileage charge instead of $0.285
(C) Correct: this matches the correct calculation
(D) Incorrect: this is the cost of renting the car for 10 days, not 5 days, and does not include the mileage charge
(E) Incorrect: this is the result of using $2.85 per mile for the mileage charge instead of $0.285