Mixed Logarithms Word Problems - Teach-nology

Name ___________________________
Date ____________________
Mixed Logarithms Word Problems
1. Casey invested $1,225 in a certain bond that pays
19% interest compounded annually. How long will it
take for Brad's investment to triple
2. A material of 490 grams decays at a rate of 0.94%
per year. How much material will be left after 9 years
3. Elsie put $3,800 in a scheme that pays 9% interest
compounded quarterly. How long will it take for Elsie's investment
to double
4. A material decays at a rate of 0.58% per year. How much of
240 grams of the material will be left in 7 years
5. Mike's bond will be worth $15776.60 in ten years. The bond
has an interest rate
of 6% that is compounded half-yearly. What is the present value
of the bond
6. Mini put $9,870 in a three year CD that pays nine percent
compounded annually.
What is the compound interest and amount that will be in the
bank after three years
7. Mary's health bond will be worth $5713.81 in six years. If the
interest rate is 6% that is compounded quarterly then what is the
present value of the bond
8. Gabriel invested $2,100 in a two year scheme that pays seven
percent compounded quarterly. What is the compound interest
and amount that will be in the bank after two years
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Name ___________________________
Date ____________________
Mixed Logarithms Word Problems
Answer Key
1. 6 years and 3 months
2. 448.5 grams
3. 7 years, 7 months
4. 9.7 grams
5. Present worth = $8735.12
6. Interest = $2983.31 Amount = $12853.31
7. Present worth = $4500
8. Interest = $312.65 Amount = $2412.65
© This math worksheet is from www.teach-nology.com