According to given information,
Equation of Melinda Earning = 75 + 12x
Equation of Marcus Earning = 15x
Where, x = Number of hours they worked.
Now, we need to calculate when they will have same amount of money, so for that instance they shall equal to each other.
75 + 12x = 15x
15x - 12x = 75
3x = 75
x = 75/3
x = 25
After 25 hours, they will have the money = 15(25) = $375
So, your final answer is $375
Hope this helps!
Answer:

Step-by-step explanation:
Represent
- Andy with A
- Christopher with C


Required
Determine the ratio of C to A
Ratio is represented as thus:

Rewrite as fraction

This gives

Convert L to mL




--- Approximated