Final answer:
The total cost of renting a car and driving 20 miles with AVIS's rates of $49.99 plus $0.99 per mile is $69.79, which makes option D) $69.79 the correct answer.
Step-by-step explanation:
To calculate the total cost of renting a car based on the provided rates, you would break down the cost into two parts: the flat rate and the variable cost per mile. The flat rate for renting the car is $49.99, and the cost per mile is $0.99. If you drive 20 miles, you will need to calculate the mileage cost by multiplying the number of miles by the cost per mile:
20 miles * $0.99 per mile = $19.80 for mileage.
Now, add the flat rate to the mileage cost to get the total cost:
$49.99 + $19.80 = $69.79 total cost.
The answer is D) $69.79. This is what you would have to pay for renting a car and driving it for 20 miles with the rates given by AVIS rent a car.