I attached a photo of my work below; I just screenshotted the photo you provided. I apologize in advance for any mistakes, it’s 1 am and I’m in need of some sleep. However, I hope it helps otherwise. Have a good one!
So,
To find the median, arrange all the numbers from least to greatest.
10, 31, 36, 36, 38, 42, 47, 48, 49, 52
The middle two numbers are 38 and 42. Take their average.
40
40 is the median of 10, 31, 36, 36, 38, 42, 47, 48, 49, and 52.
PEMDAS
Parentheses
Exponents
Multiplication
Division
Addition
Subtraction
(4+5)÷3×4
9÷3•4
3•4
12
Answer:
Two half gallon containers can hold 1 gallon, whic is about 3.785 liters.
Step-by-step explanation

Our expression is
.
Substitute in
. 
Follow the order of operations. Divide first. 
Add. 