PSAT Math Multiple-Choice Question 509: Answer and Explanation

Question: 509

Kendall is baking a cake that requires 0.8 quarts of cream, but her measuring cup only measures liters. There are 1.06 quarts in 1 liter. Which of the following is the approximate number of liters of cream Kendall needs for the recipe?

• A. 1.55
• B. 0.85
• C. 0.75
• D. 0.26

Correct Answer: C

Explanation:

C

The question asks for the approximate amount of cream, in liters, needed for a recipe, given amount in quarts. The question states that Kendall needs 0.8 quarts of cream, and that there are 1.06 quarts in one liter. To deal with unit conversions, make a proportion. The proportion is . Cross-multiply to get 1.06x = 0.8, then divide both sides of the equation by 1.06, which gives x ≈ 0.754. Since the question asks for an approximate number, look for the closest answer choice. The correct answer is (C).