15. X= — 11/12
16. X= — 14/15
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Answer:
6,300
Step-by-step explanation:
6000+300
expressed as standard form^
Recall the logarithm rules :
a^y = x is the same as log_a x = y
In this case,
a = 18
y = r - 10
x = 93
So,
18^ (r-10) = 93
is the same as
log_18 93 = r - 10
Solve for r to get :
10 + log_18 93 = r
