Internet Use in China The percentage of Chinese residents who use the Internet can be approximated by the function
where
What percentage of Chinese residents used the Internet in 2006? In 2015?
According to this model, will participation reach 50% by 2050?
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Mathematics with Applications In the Management, Natural, and Social Sciences (12th Edition)
- Flood Control A river is 8 feet above its flood stage. The water is receding at a rate of 3 inches per hour. Write a mathematical model that shows the number of feet above flood stage after t hours. Assuming the water continually recedes at this rate, when will the river be 1 foot above its flood stage?arrow_forwardPhysiology Doctors treated a patient at an emergency room from 2:00P.M.to7:00P.M.. The patient’s blood oxygen level L (in percent form) during this time period can be modeled by L=0.270t2+3.59t+83.1,2t7 where t represents the time of day, with t=2 corresponding to 2:00P.M.. Use the model to estimate the time (rounded to the nearest hour) when the patient’s blood oxygen level was 93.arrow_forwardEastern Pacific Yellowfin Tuna Studies to fit a logistic model to the Eastern Pacific yellowfin tuna population have yielded N=1481+36e2.61t where t is measured in years and N is measured in thousands of tons of fish. a. What is the r value for the Eastern Pacific yellowfin tuna? b. What is the carrying capacity K for the Eastern Pacific yellowfin tuna? c. What is the optimum yield level? d. Use your calculator to graph N versus t. e. At what time was the population growing the most rapidly?arrow_forward
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