Back to Exercise: Express exponential solutions as logarithms

Exercises: Express Exponential Model Solutions as Logarithms

Show all steps for each problem. For problems that require a calculator, round decimal answers to two decimal places unless otherwise stated.

Grade 9·23 problems·~30 min·Common Core Math - HS Functions·group·hsf-le-a-4
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A

Warm-Up: Review What You Know

These problems review skills from earlier lessons.

1.

Which of the following is equivalent to 25=322^5 = 32?

2.

To solve 53t=1355 \cdot 3^t = 135, the first step is to isolate 3t3^t. What is the result of that first step?

3.

Which statement correctly describes what log101000\log_{10} 1000 equals and why?

B

Fluency Practice

1.

Solve 42t=644 \cdot 2^t = 64. Write tt as a logarithm and then evaluate it.

2.

Solve 310t=3003 \cdot 10^t = 300. Write tt as a base-10 logarithm and evaluate. What is tt?

3.

Solve 200100.5t=5000200 \cdot 10^{0.5t} = 5000. Round your answer to two decimal places.

4.

Solve 50e0.04t=15050 \cdot e^{0.04t} = 150. Round your answer to two decimal places.

5.

Solve 122t/3=19212 \cdot 2^{t/3} = 192. Round your answer to two decimal places if needed.

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