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write the expression as the logarithm of a single quantity.

2 In 8 + 5 In z

My answer is 7 In 8z but I don't not think this is right!

2 answers

Nope, not right.
try these rules...
a ln b= ln( b^a)
and ln c + ln d= ln (cd).

use the properties of logarithms to simplify the logarithmic expression.

log10 (9/300)

Please explain!!

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