16%12%8%4%8142250010Histogram of Final Exam Scores2050ScoresAn "A" for the test is scores over 80. About what percent of the class scored an A?30406070809034100

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Intermediate Algebra

10th Edition

ISBN:9781285195728

Author:Jerome E. Kaufmann, Karen L. Schwitters

Publisher:Jerome E. Kaufmann, Karen L. Schwitters

Chapter11: Exponential And Logarithmic Functions

Section11.S: Summary

Problem 6S

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Running Speed A man is running around a circular track that is 200 m in circumference. An observer uses a stopwatch to record the runners time at the end of each lap, obtaining the data in the following table. aWhat was the mans average speed rate between 68 s and 152 s? bWhat was the mans average speed between 263 s and 412 s? cCalculate the mans speed for each lap. Is he slowing down, speeding up or neither? Time s Distance m 32 200 68 400 108 600 152 800 203 1000 263 1200 335 1400 412 1600
Draw a scatter plot for the data in Table 3. If we wanted to know when the population would reach 15,000,would the answer involve interpolation or extrapolation?
Running Speed A man is running around a circular track that is 200 m in circumference. An observer uses a stopwatch to record the runner’s time at the each of each lap, obtaining the data in the following table. (a) What was the man’s average speed (rate) between 68 s and 152 s? (b) What was the man’s average speed between 263 s and 412 s? (c) Calculate the man’s speed for cadi lap, Is he slowing down, speeding up, or neither?
Richter Scale Exercise S-1 through S-6 use elementary properties of Richter Scale. One earthquake reads 4.2 on the Richter scale, and another reads 7.2. How do the two quakes compare?
Richter Scale Exercise S-1 through S-6 use elementary properties of Richter Scale. If the relative intensity of a quake is multiplied by 10t, how is the Richter scale reading affected?
Richter Scale Exercise S-1 through S-6 use elementary properties of Richter Scale. If the Richter scale reading of one quake is t units larger than that of a second quake, how do the relative intensities of the quake compare?
Weight Versus Height The following data show the height h, in inches, and weight w, in pounds, of an average adult male. h 61 62 66 68 70 72 74 75 w 131 133 143 149 155 162 170 175 a Make a power model for weight versus height. b According to the model from part a, what percentage increase in weight can be expected if height is increased by 10?
Richter Scale Exercise S-1 through S-6 use elementary properties of Richter Scale. One earthquake has a Richter scale reading of 5.4. Another is one-thousandth as strong. What is its Richter scale reading?
An Uncertain Investment Suppose you invested 1300 in the stock market two years ago. During the first year the value of the stock increased by 12%. During the second year, the value of the stock decreased by 12%. How much money is your investment worth at the end of the two-year period? Did you earn money or lose money? Note: The answer to the first question is not 1300
Psychologists have developed mathematical models to predict memory performance as a function of the number of trials n of a certain task. Consider the learning curve P=0.5+0.9(n1)1+0.9(n1),n0 where p is the fraction of correct responses after n trials. (a) Complete the table for this model. What does it suggest? (b) According to the model, what is the limiting percent of correct responses as n increases?
Richter Scale Exercise S-1 through S-6 use elementary properties of Richter Scale. One earthquake has a Richter scale reading of 6.5. A second is 100 times as strong. What is its Richter scale reading?

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16% 12% 8% 4% 0 10 Histogram of Final Exam Scores 20 30 40 60 70 50 Scores An "A" for the test is scores over 80. About what percent of the class scored an A? 80 90 34 100