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NDT 9. [0.3311 Points] DETAILS I PREVIOUS ANSWERS LARAPCALC1DE.3.D52. Biology Because of an insufcient oxygen supply, the trout population in a lake is dying. The
NDT 9. [0.3311 Points] DETAILS I PREVIOUS ANSWERS LARAPCALC1DE.3.D52. Biology Because of an insufcient oxygen supply, the trout population in a lake is dying. The population's rate of change can be modeled by f = enoe't'ED o't where t is the time in days. When t : 0f the population is 3,300. (a) Find a model for the population. r P") = 3300.; 30 \f (b) What is the population of sh after 12 days? (Round your answer to the nearest integer.) (c) How long (in days) will it take for the entire trout population to die? (Assume the entire population has died off when the population is less than one. Round your answer to one decimal place.) Need Help? Submit Answer 10. [-I1 Points] LARAPCALCW 5.3.056. The rate oi= change in revenue for DIRECTV from 2004 through 2013 can be modeled by where R is the revenue [in billions of dollars} and t is the time (in years), with t = 4 corresponding to 2004. In 2010, the revenue for DIRECTV was 524.1 billion.l' (a) Find a model for the revenue of DIRECTV. (Round your constant term to two decimal places. Remember to use absolute values where appropriate.) 9(3) : (b) Find the revenue of DIRECTV in 2013. [Round your answer to two decimal places.)
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