Use a calculator to evaluate each expression. Round to three decimal places.
3
1. e3
2. 5e4
3. ln1.6
4. 4ln6+7
5. 5ln7–ln8
Evaluate each expression without using a calculator.
6.log 82
7.6log 1/49
8.lne
9.5lne3
10.ln1875
11. ln e
12. log m 1
13. ln 1
14. 4 ln e-3Expand each expression using the properties of logarithms.
e
15. log 8x4 7
16. log a m yw
17. ln 5x3
18. lnx y
19. lnx4y-3Use the properties of logarithms to condense each expression.
20. lnx+ln5 + 1⁄2lny
21. ln6–(lnx+ln3)
22.4lnx–ln2
t
N = No (r)d Exponential Growth or Decay A = Pert Interest Compounded Continously
rnt
A = P1 + n Compound Interest
23. You deposit $1200 in an account that pays 5% interest. Find the balance in the account after 10 years if the interest was compounded continuously.
24. You deposit $2000 in an account that pays 6% annual interest, compounded quarterly. How long will it take for the balance to reach $2500?
25. The half-life of iodine is 13 hours. How long does it take 80 grams to decay to 50 grams?
+4 
