1. Word Problems ---logs Solving word problems using Logs

2. 1.How long will it take for $100 to accumulate to $300 if it is invested at an interest rate of 8% per year?

3. .. 2.The speed, V, of a chemical reaction increases with the temperature, t, at a constant rate of 10% and is given by the formula Find the value of t when..

4. 3. Blue Jeans fade when washed due to loss of blue dye originally contained in the fabric. Suppose each washing removes about 2.5% of the dye from the fabric. How many washings are required to give jeans a well worn look. (For a well worn look, the jeans should contain, at most, 30% of the original dye.)

5. 4. A grandparent leaves a newborn baby $2000 to be invested to yield $6000 when the child is 30 years old. At what rate of interest should the money be invested to yield the required amount?

6. 5.For each $100 invested, a trust company guarantees to pay $466 in 20 years. What rate of interest does such an investment return?

7. 6.A rich relative gave Pat a gift of $100 000 as a college fund. Pat can withdraw half the money that remains in the fund once every 5 months. Set up an equation that models the money remaining in the fund and use it to determine to nearest five months, when the amount remaining first drops below $500.