8. [0/0.55 Points] DETAILS PREVIOUS ANSWERS TANAPCALC10 4.5.020. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Maximizing Yield An apple orchard has an average yield of 32 bushels of apples per tree if tree density is 26 trees per acre. For each unit increase in tree density, the yield decreases by 2 bushels per tree. How many trees per acre should be planted to maximize the yield? 15 X trees/acre Need Help? Read It Watch It Submit Answer 9. [0/0.6 Points] DETAILS PREVIOUS ANSWERS TANAPCALC10 4.5.023. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Optimal Speed of a Truck A truck gets 800/x miles per gallon (mpg) when driven at a constant speed of x mph, where 40 s x's 80. If the price of fuel is $2.80/gal and the driver is paid $12/hr, at what speed is it most economical for the trucker to drive? (Round your answer to two decimal places.) 58.54 X mi/h Need Help? Read It Submit