Using proportions, it is found that it takes Brian 2.7 minutes to completely iron out his shirt.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and equations can be built to find the desired measures in the problem using operations such as multiplication and division with the unit rates to find the equivalent measures.
For this problem, we have that he irons out 2/9 of his shirt in 3/5 minutes, and we want to find how long it takes to iron out his shirt, which has a equivalent fraction of 1.
The rhythm is constant, hence the rule of three is given by:
2/9 of shirt - 3/5 minutes
1 shirt - x minutes
Applying cross multiplication, we have that:
2/9x = 3/5
2x = 27/5
x = 27/10
x = 2.7 minutes.
<h3>What is the missing information?</h3>
This problem is incomplete and could not be found on any search engine, hence we are going to suppose that it asks for how long it takes to iron out his shirt.
More can be learned about proportions at brainly.com/question/24372153
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