56 out of 128 students went on a trip during vacation. what percent of students went on the trip?

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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?