Question:If`  log_10 125 + log_10 8 = x,` then x is equal to : 

A `3` 
B `- 3` 
C `1/3` 
D `.064` 

+ Answer
A 

+ Explanation
`log_10 125 + log_10 8`

`= x ⇒ log_10 (125 xx 8) = x.`

`:. x = log_10 (1000)`

`= log_10 (10^3)`

`= 3 log_10 10`

`= (3 xx 1) = 3`

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Irin Moni

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