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9) The growth in the mouse population at a certain county dump can be modeled by the exponential function A(t)=906e^0.012t where t is the number of...

9) The growth in the mouse population at a certain county dump can be modeled by the exponential function A(t)=906e^0.012t where t is the number of months since the population was first recorded. Estimate the population after 36 months.

A) 1396   B) 698   C) 917   D) 1412

10) The decay of 938 mg of an isotope is given by A(t)=938e^-0.022t, where t is time in years since the initial amount of 938 mg was present. Find the amount (to the nearest milligram) left after 96 years.

A) 57    B) 113    C) 111  D) 918

11) An element decays at the rate of S(t) =Se^-0.048t, where S is the initial amount in grams and t is the time in years since this initial amount was present. If you have a 71 - gram piece of this element, how many grams will you have 5 years from now? Round your answer to the nearest tenth of a gram.

 A) 90.3 g   B) 0.8 g   C) 55.9 g   D) 33.8 g

15)  why cant f(x)=2^x have an x intercept?

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