I would say C because it makes more sense than all the others.
Using the together rate, it is found that they would prepare the solution in 1.71 minutes working together.
<h3>What is the together rate?</h3>
It is the sum of each separate rate.
In this problem, the rates are given by:
Hence the together rate is given by:



7x = 12
x = 12/7
x = 1.71.
They would prepare the solution in 1.71 minutes working together.
More can be learned about the together rate at brainly.com/question/25159431
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Don't shade the part A and the part between A and B. Shade the B part only.
9 is D
10 is either a or b
Question number 26 is answer choice a.