[Question]: As soon as you enter the taxi, you pay a ride fee of $2. Michelle rode a taxi from her office to her home, which constitutes 4 miles. If the taxi charge per mile is $2.5, how much did pay Michelle pay in total for her ride?
[Answer]: The taxi charge for a distance of 4 miles is 4 x $2.5 = $10. The total amount that Michelle paid for the ride was $2 + $10 = $12.
So the answer is 12.

[Question]: Keanu was surfing towards the shore at a speed of 20 miles per hour. A shark was swimming alongside him, riding the same wave, when it doubled its speed and moved away from Keanu. There was a pilot fish swimming alongside Keanu and the shark, and when the shark increased its speed, the pilot fish also increased its speed and moved away from Keanu, but only increasing its speed by half as much as the shark had increased its speed by. What speed, in miles per hour, was the pilot fish swimming when it moved away from Keanu?
[Answer]: The shark went from 20 miles per hour to a speed of 2 * 20 = 40 miles per hour. The shark increased its speed by 40 - 20 = 20 miles per hour. Half of the shark's increase in speed is 20 / 2 = 10 miles per hour. Thus the pilot fish had increased its speed to 20 + 10 = 30 miles per hour.
So the answer is 30.

[Question]: The new pad of paper has 120 pages. Sammy uses 25% of the pages for his science project, and another 10 pages for his math homework. How many pages remain in the pad?
[Answer]:
He used 0.25 * 120 = 30 on science. There were 120 - 30 = 90 pages left. And then he has 90 - 10 = 80 after math.
So the answer is 80.