Concept explainers
Latin American Internet use Using data from
With
(Source: eMarketer)
Does the graph of this function bend upward or downward ?
Graph this function on an interval representing
In what year will the number of internet users in Latin America reach
Trending nowThis is a popular solution!
Chapter 2 Solutions
WebAssign Printed Access Card for Harshbarger/Reynolds' Mathematical Applications for the Management, Life, and Social Sciences, 12th Edition, Multi-Term
- Telephone Service The percent P of households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model P=3.42+1.297tlnt,5t14 where t represents the year, with t=5 corresponding to 2005. (Source: National Center for Health Statistics) (a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012. (b) Use a graphing utility to graph the function. (c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020? in 2030? Explain.arrow_forwardHealth Plan The manager of an employee health plan for a firm has studied the balance B, in millions of dollars, in the plan account as a function of t, the number of years since the plan was instituted. He has determined that the account balance is given by the formula B=60+7t50e0.1t a. Make a graph of B versus t over the first 7 years of the plan. b. At what time is the account balance at its maximum? c. What is the smallest value of the account balance over the first 7 years of the plan?arrow_forwardSwimming Laps Miyuki practices swimming laps with her team. The function y=f(t) graphed below gives her distance (in meters) from the starting edge of the pool t second after she starts her laps. (a) Describe in words Miyuki’s swim practice. What is her average speed for the first 30 s? (b) Graph the function y=1.2(t) .How is the graph of the new function related to the graph of the original function? (c) What is Miyuki’s new average speed for the first 30s?arrow_forward
- Lidocaine Lidocaine is a drug used to treat irregular heartbeats. After an injection of a 100-mg dose of lidocaine, the amount of the drug in a patients bloodstream is 33.67(e0.0075731te0.12043t)mg at time t minutes after the injection. a. Make a graph of the amount of drug in the bloodstream for t up to 4 hours 240 minutes. b. When does the drug reach its maximum level in the bloodstream? c. For a person of typical size, the drug is effective as long as the amount in the bloodstream is at least 7.5 mg. For how long is the drug at or above that level? Hint: The drug is at that level twice. d. For a person of typical size, the lethal level occurs when the amount in the bloodstream exceeds 30 mg. Is this dose lethal for such a person? e. For a small person, the lethal level occurs when the amount in the bloodstream exceeds 15 mg. Is this dose lethal for such a person? If so, after how many minutes will it be lethal?arrow_forwardSwimming Laps Miyuki practices swimming laps with her team. The function y=f(t) graphed below gives her distance in meters from the starting edge of the pool t seconds after she starts her laps. Describe in words Miyukis swim practice. What is her average speed for the first 30 s? Graph the function y=1.2f(t). How is the graph of the new function related to the graph of the original function? What is Miyukis new average speed for the first 30 s?arrow_forward
- Algebra and Trigonometry (MindTap Course List)AlgebraISBN:9781305071742Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage LearningAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageCollege AlgebraAlgebraISBN:9781305115545Author:James Stewart, Lothar Redlin, Saleem WatsonPublisher:Cengage Learning
- Trigonometry (MindTap Course List)TrigonometryISBN:9781337278461Author:Ron LarsonPublisher:Cengage LearningFunctions and Change: A Modeling Approach to Coll...AlgebraISBN:9781337111348Author:Bruce Crauder, Benny Evans, Alan NoellPublisher:Cengage Learning