20. Express 2log7 5 as a single logarithm. A. log7 115 B. log7 52 C. log7 511 D. log7 √ 5

For a logarithm that is expressed in that form, the numerical coefficient should be the exponent of number 5. Such that the simplified logarithm should be,

log7 (5^2)

Simplifying the answer would give,

log7 (25)

The answer is not among the choices.