Solutions: Exponential and Logarithmic Functions Practice Test
1. About 13 dolphins.
3. $1,947
5. y-intercept: (0, 5)
7. 8.5a=614.125
9. x=(71)2=491
11. ln(0.716)≈−0.334
13. Domain: x < 3; Vertical asymptote: x = 3; End behavior: x→3−,f(x)→−∞ and x→−∞,f(x)→∞
15. logt(12)
17. 3ln(y)+2ln(z)+3ln(x−4)
19. x=3ln(16)ln(1000)+5≈2.497
21. a=10ln(4)+8
23. no solution
25. x=ln(9)
27. x=±233
29. f(t)=112e−.019792t; half-life: about 35 days
31. T(t)=36e−0.025131t+35;T(60)≈43oF
33. logarithmic
35. exponential; y=15.10062(1.24621)x
37. logistic; y=1+7.54644e−0.68375x18.41659
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Precalculus.Provided by: OpenStaxAuthored by: Jay Abramson, et al..Located at: https://openstax.org/books/precalculus/pages/1-introduction-to-functions.License: CC BY: Attribution. License terms: Download For Free at : http://cnx.org/contents/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175..