The cost, in millions of dollars, for a company to manufacture x thousand speed boats is given by the function

c(x) = 3x2 - 30x + 225.

find the number of speedboats that must be produced to minimize the cost.

Which expression is equivalent to 4 square root 6 divided by 3 root 2

Find the cosine function that is represented in the graph.

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.