4. [-/1.66 Points] DETAILS TANAPMATH7 2.7.022. MY NOTES ASK YOUR TEACHER Walking Versus Running The oxygen consumption (in milliliter/pound/minute) for a person walking at x mph is approximated by the function /(x). ((x) = 3 x2 + 2 x+ 10 (0 S x 5 9) The oxygen consumption for a runner at x mph is approximated by the function g(x).+ g(x) = 11x + 10 (4 5 x s 9) (a) Sketch the graphs of f and g. 150 150 100 100 50 50 O 150 150 100 100 50 50 (b) At what speed (in mph) is the oxygen consumption the same for a walker as it is for a runner? (Round your answer to one decimal place. mph What is the level of oxygen consumption (in mL/Ib/min) at that speed? (Round your answer to one decimal place.) mL/lb/min Need Help? Read It Watch it 5. [-/1.66 Points] DETAILS TANAPMATH7 2.7.036. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Packaging Costs A rectangular box is to have a square base and a volume of 40 ft. The material for the base costs 44e/ft?, the material for the sides costs 10e/fts, and the material for the top costs 274/ft2. Letting x denote the length of one side of the base, find a function in the variable x giving the cost (in dollars) of constructing the box. (( x ) = Need Help? Read It Watch It 6. [-/1.7 Points] DETAILS TANAPMATH7 2.7.037. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Area of a Norman Window A Norman window has the shape of a rectangle surmounted by a semicircle. Suppose a Norman window is to have a perimeter of 42 ft. Find a function in the variable x that gives the area of the window