The price of a gallon of unleaded gas was $2.83 yesterday. today, the price fell to $2.78 . find the percentage decrease. round your answer to the nearest tenth of a percent.

What could explain what happened when the time was equal to 120 minutes

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)