A company that manufactures pet toys calculates that its costs and revenue can be modeled by the equations.
C=75,000 + 1.65x and R=500(x²-/25)
where x is in the number of toys produced in 1 week. Production during one particular week is 5000 toys and is increasing at a rate 5000 toys and is increasing at a rate of 350 toys per week. Find the rate at which the cost, revenue, and profit are changing.