The five gallons is cheaper since 97.45 divided by 5 is equal to 19.49.
I am confused by this question. But I will try to answer. Is it Exponential Decay?
Y: is the number
[Y*(-1)]+(-5)
(-Y)+(-5)
-Y-5
<span>I hope it helps you :)</span>
Chenoa starts with $250 in her saving account and each month she adds $15 in her saving account.
Therefore, we obtain a sequence as:
250, (250+15), (250+15+15),...
250, 265, 280,....
So, we get the first term (
) as 250.
Now , we can clearly observe that the first term is 250 and second term is obtained by adding 15 to the first term that is 265 and so on.
Similarly in an arithmetic progression, last term is
and its previous term is
.
Similarly,
will be obtained by adding 15 to its previous term
.
So,
and
=250.
Therefore, Option C is correct.