To determine how many glasses of lemonade Max and Leah sold after 5 hours, we can break down their sales hour by hour.
Max's Sales:
- In the first hour, Max sold 12 glasses.
- In the subsequent 4 hours (2nd to 5th hour), he sold 10 glasses each hour.
- Total for the next 4 hours: \(10 \times 4 = 40\) glasses.
So, total for Max after 5 hours: \[ 12 + 40 = 52 \text{ glasses} \]
Leah's Sales:
- In the first hour, Leah sold 8 glasses.
- In the next 4 hours (2nd to 5th hour), she sold 10 glasses each hour.
- Total for the next 4 hours: \(10 \times 4 = 40\) glasses.
So, total for Leah after 5 hours: \[ 8 + 40 = 48 \text{ glasses} \]
Thus, after 5 hours:
- Max sold 52 glasses.
- Leah sold 48 glasses.
The answer is D: Max 52 glasses, Leah 48 glasses.