Advanced Algebra Ch. 8 Name___________________
8.8 Worksheet
Solve each problem.
1. For a certain strain of bacteria, k is 0.775 when t is measured in hours. How long will it take 2
bacteria to increase to 1000 bacteria?
2. Jackson deposited $100 in a savings account that pays 6% interest compounded continuously. He
just withdrew the entire balance of $200. How long ago did he open the account?
3. The constant k for a radioactive substance is -0.08042 when t is measured in years. In how many
years will a 250-gram sample reduce to 50 grams?
4. A culture of a certain bacteria will grow from 500 to 4000 bacteria in 90 minutes. Find the constant k
for this bacteria if k is in hours.
