I have a question about my math one i don't get it

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

How to use order of operation in 20 divide by 4 multiply 5 = 1

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?