
Let

denote the

th partial sum of the series, i.e.

Then

and subtracting from

we get


As

, the exponential term vanishes, leaving us with

and so
I think the answer would be 85.1
The formula<span> will be a</span>n<span> = a</span>12n - 1<span> or a</span>n<span> = (1)2</span>n - <span>1</span>
Answer: $360
Step-by-step explanation:
In one hour, she makes $9 * 10 dogs = $90.
In 4 hours, we simply multiply that by 4 to get $90 * 4 = $360 total