Assignment Submission & Scoring Assignment Submission -or thlS aSSIgnment, you submit answers by question parts. The number of submissions remaining for each question part only changes if iou submit or change the answer. Assignment Scoring Your last submission is used for your score. '1.[-13Points] i DETAILS ' SPRECALC73.6.089. MY NOTES A graphing calculator is recommended. giving the drug) the concentration (in mg/L) is given by \\ 7t cit): 2 . t +4 Graph the function c with a graphing device. (Round your answers to two decimal places.) (a) What is the, highest concentration of drug that is reached in the patient's bloodstream? c = C'f . mg/L (b) What happens to the drug concentration after a long period of time? 0 The concentration of the drug in the bloodstream is naturally restored to its highest level. E l O The concentration of the drug in the bloodstream is reduced by 50%. i O The concentration of the drug in the bloodstream goes to 0 mg/L. O Nothing. the concentration of the drug remains constant throughout its time in the bloodstream. (c) How long does it take for the concentration to drop below 0.2 ring/L? l t=r hr t/v Need Help? ll mnT @l 2. [I2 Points] DETAILS SPRECALC7 3.6.091. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 2 higher to the observer than it would if the train This phenomenon is called the Doppler effect. The i l A graphing calculator is recommended. As a train moves toward an observer (see the gure), the pitch of its whistle sounds were at rest, because the crests of the sound waves are compressed closer together. observed pitch P is a function of the speed v of the train and is given by (c) How long does it take for the concentration to drop below 0.2 mg/L? t = hr Need Help? Read It Watch It 2. [-/2 Points] DETAILS SPRECALC7 3.6.091. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A graphing calculator is recommended. As a train moves toward an observer (see the figure), the pitch of its whistle sounds higher to the observer than it would if the train were at rest, because the crests of the sound waves are compressed closer together. This phenomenon is called the Doppler effect. The observed pitch P is a function of the speed v of the train and is given by P ( V ) = Po( 50 - V) where Po is the actual pitch of the whistle at the source and so = 332 m/s is the speed of sound in air. Suppose that a train has a whistle pitched at Po = 440 Hz. Graph the function y = P(v) using a graphing device. 4000 400 -300 -200 -100 -1000 3000 -2000 2000 -3000 1000 -4000 + V O-400 -300 -200 -100 O 100 200 300 400 4000 -1000 3000 -2000 2000 -3000 1000 -4000 O O 100 200 300 400 What is the vertical asymptote of the function P? m/s Need Help? Read It Watch Itwebassign.net a For a camera with a lens of fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens, where F, x, and y are related by 1 41 _1 y F (See the figure.) Suppose the camera has a 55-mm lens (F = 55). (a) Express y as a function of x. y = Graph the function. y 250 - X 200 400 600 800 1000 200 -50 150 -100 100 -150 50 -200 -250 200 400 X 600 800 1000 y y 250 200 400 600 800 1000 200 -50 150 100 100 -150 50 -200 -250 O 200 400 600 800 1000 (b) What happens to the focusing distance y as the object moves far away from the lens? y - mm (c) What happens to the focusing distance y as the object moves close to the lens? y - mm