The number x (in thousands) of cat flea collars demanded each year when the price of a collar is p dollars is expressed by the function x^3+300p^2=17,500. The collars are currently selling for $5 each and the annual number of sales is 21,544. Find the approximate decrease in sales of the collar if the price of each collar is raised by $1.
The approximate decrease in sales is about ( ) collars.
2. The cost C (in dollars) of manufacturing x number of high-quality computer laser printers is
C(x)=12x^(4/3)+12x^(2/3)+450,000
Currently, the level of production is 2,197 printers and that level is increasing at the rate of 400 printers per month. Find the rate at which the cost is increasing each month.
The cost is increasing at about $( ) per month.