5. Researchers have recently discovered that penguins like to visit Ottawa in the winter be-cause of the nice weather. At the time the discovery was made, there were 100 penguinsvisiting. Since then, the researchers have recorded that each day, 10% of the visiting pen-guins leave and 40 more penguins fly in (on Air Canada flights).What DTDS best models the population of visiting penguins?A. P+1 = 0.1P, + 40B. P+1 = -0.1P, + 40C. P41 = 0.9P;D. P+1 = 0.9P; + 40E. P+1 = 0.9P; + 100F. P+1 = 0.1P, + 100

Here we need to find a mathematical model of the number of penguins (i+1)th day for a given initial…

Answered: Researchers have recently discovered…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Since muscle tension in the head region has been associated with tension headaches, a researcher reasoned that if the muscle tension could be changed, perhaps the headaches would also be changed. The researcher designed an experiment in which nine subjects with tension headaches participated. The subjects kept daily logs of the number of headaches they experienced during a 2-week baseline period. Then the researcher trained them to change their muscle tension in the head region, using a biofeedback device. For this experiment, the biofeedback device was connected to a muscle in the forehead region. The device indicated the subject's amount of tension in the muscle to which it was attached and helped them achieve low tension levels. After 6 weeks of training, during which the subjects became successful at maintaining low muscle tension, they again kept a 2-week log of the number of headaches experienced. The following are the number of headaches recorded during each 2-week period.…
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