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College Algebra/Functions and their properties*
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Evaluating Logarithmic Equations

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What is the required diameter (D), in millimeters, of a telescope lens needed to observe stars of magnitude (M) = 17?

Use the logarithmic equation M = 5 log D + 2, where M is the magnitude and D is the diameter.

A

15

B

3

C

17

D

10

E

1000

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