Please help ASAP 25 pts + brainliest to right/best answer

Answer:
C. 11 log x
Step-by-step explanation:
= 5 log (10) x + 3 log (10) x^2
= log(10) x^5 + log(10) (x^2)^3
= log(10) x^5 + log(10) x^6
= log (10) x^11
=11 log (10) x
or
= 11 log x
Answer is C.