Answer:
Step-by-step explanation:
Given
Required
Determine the common ratio
The common ratio r is calculated using:
Let
So, we have:
From the sequence:
So, the equation becomes
<span>
-X * (x-9) should be the answer</span>
Answer:
25 hrs
Step-by-step explanation:
#First, we calculate the average earnings per hour by subtracting the running costs from receipts:
Let x be the number of hours it takes to fully recover the investment costs. We divide the investment cost by net receipts to solve for x;
Hence, it takes 25 hrs to repay the investment cost.