If Mr. Charles was supposed to arrive to work at 9:00 A. M. and he arrived at 8:30 A. M., how many minutes early was he?

A
45 minutes

B
20 minutes

C
30 minutes

D
60 minutes

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude