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exponential[1] - 07B-copyright Joe Kahlig Exponential...

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07B-copyright Joe Kahlig Exponential Functions Page 1 Exponential Functions In problems 1-13, solve for x. 1. 3 x = 1 81 2. 7 2 x = 7 3. 5 2 x - 7 = 1 4. 3 x 2 - 3 = 3 5. 2 x 4 8 = 8 3 6. 3 x 9 x +1 = 27 7. 4 (5 x 2 - x ) = 1 16 x 8. 3 (2 x 2 - 3 x ) = 9 x 9. x 2 5 2 x = 5 2 x 10. ( x 2 6 x + 8)3 x = 0 11. x 2 6 x = x 6 x 12. 8 2 x 2 = 4 x 13. 4 2 x 2 2 x - 1 = 8 x 2 14. A town grows continuously and has a growth rate of 12%, if 400 people live in the town now, what will be the pop- ulation in five years? Round you answer to the nearest person. 15. A town grows continuously and has a growth rate of 5%. You are told that in 10 years there will be 10,400 people in the town. How many people are living in the town now? Round you answer to the nearest person. 16. You start an account with $1000. The account pays 6.75% interest compounded monthly. At the end of the first year you deposit an additional $300 and at the end of the second year you deposit an additional $600. What is the balance of the account 6 years after it was started?
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