Chapter 1: Problem 41
Imagine that you counted 60 numbers per minute and continued to count nonstop until you reached 10,000 . Determine a reasonable estimate of the number of hours it would take you to complete the counting.
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Chapter 1: Problem 41
Imagine that you counted 60 numbers per minute and continued to count nonstop until you reached 10,000 . Determine a reasonable estimate of the number of hours it would take you to complete the counting.
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Ten people ordered calculators. The least expensive was \(\$ 19.95\) and the most expensive was \(\$ 39.95\). Half ordered a \(\$ 29.95\) calculator. Select the best estimate of the amount spent on calculators. a. \(\$ 240\) b. \(\$ 310\) c. \(\$ 345\) d. \(\$ 355\)
A firefighter spraying water on a fire stood on the middle rung of a ladder. When the smoke became less thick, the firefighter moved up 4 rungs. However it got too hot, so the firefighter backed down 6 rungs. Later, the firefighter went up 7 rungs and stayed until the fire was out. Then, the firefighter climbed the remaining 4 rungs and entered the building. How many rungs does the ladder have?
Use Polya's four-step method in problem solving to solve Exercises 9-40. a. Which is the better value: a 15.3-ounce box of cereal for \(\$ 3.37\) or a 24 -ounce box of cereal for \(\$ 4.59\) ? b. The supermarket displays the unit price for the 15.3-ounce box in terms of cost per ounce, but displays the unit price for the 24-ounce box in terms of cost per pound. What are the unit prices, to the nearest cent, given by the supermarket? c. Based on your work in parts (a) and (b), does the better value always have the lower displayed unit price? Explain your answer.
American children ages 2 to 17 spend 19 hours 40 minutes per week watching television. (Source: TV-Turnoff Network) From ages 2 through 17, inclusive, estimate the number of days an American child spends watching television. How many years, to the nearest tenth of a year, is that?
A forecaster at the National Hurricane Center needs to estimate the time until a hurricane with high probability of striking South Florida will hit Miami. Is it better to overestimate or underestimate? Explain your answer.
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