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Brynlee
12-30-2013, 05:31 AM
Logarithms SAT Subject test Math level 2

Which of the following is the value of c given that log_{c}25=2 ?

(A) 2^{25}
(B) 25^2
(C) \sqrt{25}
(D) \sqrt{2}
(E) \frac{2}{25}

Thanks!

Thomas
12-30-2013, 05:31 AM
From the definition of the logarithm we have that log_{c}25=2 \Rightarrow
log_{c}25=2 \Rightarrow c^2=25 \Rightarrow c=\sqrt{25}

Therefore the correct answer is (C)

Brynlee
12-30-2013, 05:32 AM
Thank you!:)