Sarah rents a car to take her to the airport in the morning and return her home that evening. Halfway to the airport, she picks up a friend who accompanies her to the airport. That night, she and her friend return to Sarah's home. The total cost is $20.00. If the amount to be paid is to be split fairly, how much money should Shirley pay?

That depends upon how Shirley gets home and how much of the $20 was airport parking. This is not a math problem, it is more an etiquette question. Shirley should offer to pay half. She is getting escort service, after all.

Who is Shirley?

A 3000 POUND CAR IS PUSHED 500 FEET BY THREE BOYS, A FORCE OF 60 POUNDS IS REQUIRED TO MOVE THE CAR. HOW MUCH WORK DID THE BOYS ACCOMPLISH? HOW MUCH WORK CAN EACH BOY CLAIM IF HE DID HIS SHARE?

The head of a round piston has a pressure of 210 psi pushing down on it. The piston is 3 inches in diameter. What is the force pushing the piston down?

How much work does a 120 pound boy do in climbing to the top of the Washington Monument, a climb of 550 feet? If the climb in problem 2 takes 20 minutes, what is the average horsepower produced by the boy?

To solve this problem, we need to first understand the trip and how the cost should be divided. Let's break it down:

- Sarah rents the car and uses it to go to the airport and return home.
- Halfway to the airport, Sarah picks up a friend who accompanies her to the airport.
- That evening, Sarah and her friend return to Sarah's home.

Since Sarah and her friend shared the car for the entire journey, it is fair to split the cost equally between them. Now let's calculate the amount each person should pay:

If the total cost of the trip is $20.00 and it is split equally between Sarah and her friend, we can divide the total cost by 2:

$20.00 / 2 = $10.00

Therefore, Sarah's friend should pay $10.00.