a small motorboat travels 12 mph in still water. It takes 2 hours longer to travel 66 miles going upstream than it does going downstream. What is the rate of the current. Round to the nearest tenth.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

Maria solved an equation as shown below. what is the solution to maria’s equation?