Question

Which situation results in a final value of zero?

A. The overall change in altitude of a balloon rising 6 kilometers from sea level.

B. The overall change in temperature when the temperature goes from -12°F to 12°F.

C. The total distance a person travels when he rides his bike 2.5 miles to school and then rides 2.5 miles back home.

D. The total profit earned when a person buys an item for $5.99 and then sells the same item for
$5.99.

Answer 1

I believe the answer is D because even though c and d are similar, in C, the total distance ridden is 5 miles because they rode back and forth so you add the distances. In D, you don't earn any profit because you sold the item for the original price. That is why I think the answer is D. A and B isn't giving 0 as the answer because A is 6 for the answer and B's answer is 24.

Answer 2

C.
2.5mi to someplace then coming back is 0