A speedboat can maintain a constant speed of 40 miles per hour relative to the water. the boat makes the trip Downstream in 25 minutes and the return trip Upstream is 35 minutes. what is the speed of the water current a. 2 1/3 mph
b. 3 1/4 mph
c. 3 3/4 mph
d. 5 mph

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?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Aline passes through (1,-5) and(-3,7) write an equation for the line in point slope form rewrite the equation in slope intercept form