Can you answer 10, 11, and 12

The average cost function for the weekly manufacture of retro portable CD players is given by C(x) = 100,000x -1 + 30 + 0.0006x dollars per player, where x is the number of CD players manufactured that week. Weekly production is currently 5,000 players and is increasing at a rate of 500 players per week. What is happening to the average cost? ( Round your answer to the nearest cent.) The average cost is ---Select- at a rate of $ per player per week. Need Help? Read It Watch It 11. [-/7.69 Points] DETAILS WANEFMAC7 12.5.021. MY NOTES PRACTICE ANOTHER Demand for your tie-dyed T-shirts is given by the formula 9 = 490 - 80p0.5 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.) T-shirts per month Need Help? Read It Watch It 12. [-/7.69 Points] DETAILS WANEFMAC7 12.5.037. MY NOTES PRACTICE ANOTHER A point on the graph of y = - is moving along the curve in such a way that its x-coordinate is increasing at a rate of 5 units per second. What is happening to the y-coordinate at the instant the y-coordinate is equal to 3