Hi I need help with questions 9-13 please

11:517 webassign.net 9. [0/1 Points] DETAILS PREVIOUS ANSWERS TANAPMATH7 11.1.054.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find f by solving the initial value problem. Vx' (16) = 33 Rx) = 2vx + 33 x 10. [-/1 Points] DETAILS TANAPMATH7 11.1.062.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER ind the function f given that the slope of the tangent line to the graph of fat any point (x, f(x)) is f '(x) and that the graph of f passes through the given point. (Remember to use absolute values where appropriate.) f ' (x) = 4 +1; (1, 4) ((x )= 11. [-/1 Points] DETAILS TANAPMATH7 11.1.068.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The management of Lorimar Watch Company has determined that the daily marginal revenue function associated with producing and selling their travel clocks is given by R '(x) = -0.003x + 8 where x denotes the number of units produced and sold and R '(x) is measured in dollars/unit. (a) Determine the revenue function R(x) associated with producing and selling these clocks. R(x) (b) What is the demand equation that e unit price p with the quantity of travel clocks demanded? p= Need Help? Watch It 12. [-/1 Points] DETAILS TANAPMATH7 11.1.075.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A ballast is dropped from a stationary hot-air balloon that is hovering at an altitude of 200 ft. The velocity of the ballast after t sec is -32t ft/sec. (a) Find the height h(t) of the ballast from the ground at time t. Hint: h'(t) = -32t and h(0) = 200. h(t) = (b) When will the ballast strike the ground? (Round your answer to two decimal places.) (c) Find the velocity of the ballast when it hits the ground. (Round your answer to two decimal places.) ft/sec Need Help? Watch It 13. [-/1 Points] DETAILS TANAPMATH7 11.1.082.NVA MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The rate at which the risk of Down syndrome is changing is approximated by the function r(x) = 0.004641x2 - 0.3012x + 4.9 (20 s x S 45) where r(x) is measured in percentage of all births per year and x is the maternal age at delivery.+ (a) Find a function f giving the risk as a percentage of all births when the maternal age at delivery is x years, given that the risk of Down syndrome at age 30 is 0.14% of all births. (( x ) = (b) On the basis of the model, what is the risk of Down syndrome when the maternal age at delivery is 41 years? 45 years? (Round your answers to two decimal places.) 41 years 45 years submit Assignment Save Assignment Progress + 3