The answer is option D it will take 8 hours 45 minutes to manufacture 7 windows.
What is an expression?
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
The time will be calculated as follows:-
4 windows -------> 5 hours
1 window --------> 5 / 4 hours
7 window --------> 7 x ( 5 / 4 )
7 window --------> 8.75 ≅ 8 hours 45 minutes
Therefore the answer is option D it will take 8 hours 45 minutes to manufacture 7 windows.
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