OG详解-OG7 数学2 Q6

The correct answer is 2,850. It’s given that the function f(x) = 45x+600 gives the monthly fee, in dollars,a facility charges to keep x crates in storage. Substituting  50 for x in this function yields f(50) = 45(50)+600, or f(50) = 2,850. Therefore,  the monthly fee, in dollars, the facility charges to keep 50 crates in storage is 2,850.