Answer:
x = 13
Step-by-step explanation:
one of the rules of logarithm (for all bases, by the way, not just e for ln) is

so, we have
ln(3²) = ln(x-4)
=>
3² = x - 4
9 = x - 4
x = 13
1g = 1,000mg
0.5g = 0.5 · 1,000mg = 500mg
Answer:
2/4
Step-by-step explanation: