Name: SAT Math Help & School Math Mastery
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#30583

applications

equations

medium

75 sec

A chemist is mixing two solutions. Solution A is 40% acid by volume, and Solution B is 60% acid by volume. If the chemist uses $a$ liters of Solution A and $b$ liters of Solution B, and the total amount of acid in the mixture is 300 liters, which equation models this situation?

A.

$0.6 a + 0.4 b = 300$

B.

$0.4 a + 0.6 b = 300$

C.

$40 a + 60 b = 300$

D.

$60 a + 40 b = 300$