Answer: The circumference of a circle is given by the formula:
C = πd
where d is the diameter of the circle. In this case, the diameter of the wheels is 28 inches, so the circumference of each wheel is:
C = π(28) = 28π inches
To find how many revolutions the wheels need to make to travel 200 feet, we need to convert 200 feet to inches, and then divide by the circumference of each wheel. There are 12 inches in 1 foot, so 200 feet is equal to:
200 feet × 12 inches/foot = 2400 inches
Dividing 2400 inches by the circumference of each wheel, we get:
2400 inches ÷ (28π inches/revolution) ≈ 85.3 revolutions
Therefore, the car's wheels need to make approximately 85.3 full revolutions to travel 200 feet. Since the question asks for the number of full revolutions, we can round down to the nearest whole number to get:
Answer: D. 88 revolutions.