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Answers FL-1200330-Algebra 2 CREvaluating Logarithmic Expressions

Evaluating Logarithmic Expressions Answers

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Use a calculator to solve each problem. Round your answers to the nearest hundredth.What is the absolute magnitude of a star that has a period of 62 days?

Answer:

-6.33

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Evaluate: log279

Option

Which equation(s) have x = –3 as the solution?

log3(2x + 15) = 2

log5(8x + 9) = 2

log4(–20x + 4) = 3

logx81 = 4

Solve: logx343 = 3x =

Answer:

2.3165

Which did you include in your answer?

The error is in Step 1. They translated from logarithmic to exponential form incorrectly.

The student should have used 4 as the base and 3 as the exponent. This would result in 64, not 81, on the right side of the equation.

The correct answer is x = 38.

Power saw a 3 feet: I = 1011I0 I(dB) = [___]

Answer:

110

Evaluate: log61,296 =

Answer:

Evaluate: log279

Option

B. Logarithm AX B✔ CD is equal to .

X B

✔ C

Which equation(s) have x = –3 as the solution?

log3(2x + 15) = 2

log5(8x + 9) = 2

log4(–20x + 4) = 3

logx81 = 4

Question text not available

Answer:

110

What is the absolute magnitude of a star that has a period of 50 days?

Answer:

-6.07

Jet engine at 100 feet: I = 1018I0 I(dB) = [___]

Answer:

180

Which equation can you use to evaluate ?

Option

C. Logarithm X A✔ BCD is equal to .

X A

✔ B

Question text not available

Answer:

180

Simplify:=

Answer:

-3

D. Logarithm ✔ AX BCD is equal to .

✔ A

X B

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Evaluating Logarithmic Expressions Answers

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