Determining the required minimum score
What is the probability that the student will successfully earn exactly the required minimum score of 70% on the exam based solely upon randomly guessing the answer for each question?
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The thermometer in this problem: (A thermometer has a time constant of 10s and behaves as a first-order system. It is initially at a temperature of 30°C and then suddenly subjected to a surrounding temperature of 120°C.
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(a) What is the frequency of waves heard by the insect? (b) Calculate the frequency of the return waves after reflection from the insect (the insect becomes the source of these return waves) and reaching back to the bat.
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