For this case what you should see is the behavior of each function to find the correct answer.
We have functions of the type:
f (t) = a * (b) ^ t
Thus,
For I, we have:
f (t) = 30 * (1.05) ^ t
For V we have:
f (t) = 30 * (0.95) ^ t
For VI we have:
f (t) = 30 * (0.85) ^ t
Answer:
option c.

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From there you can cross multiply to get rid of the denominators.
4e=2x20
4e=40
e=10
There would be 10 ears.
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Answer:
He had $56.
Step-by-step explanation:
$46 + $10 = $56
you can also solve it like this:
x = 46 + 10
x = 56