Question

Demand for your tie-dyed T-shirts is given by the formula

q = 490 − 80p^0.5

where q is the number of T-shirts you can sell each month at a price of p dollars. If you currently sell T-shirts for $15 each and you raise your price by $2 per month, how fast will the demand drop? (Round your answer to the nearest whole number.)

dq/dt = ??? t-shirts per month