THE CORRECT ANSWER IS (A). YOU CAN EASILY ANSWER THIS QUESTION BY...

20. The correct answer is (A). You can easily answer this question by plugging in simple

values for m and k. Assume that it takes Paul 10 minutes to mow the lawn (m 5 10) and

that you want to know what portion of the job remains after 5 minutes (k 5 5).

Obviously, exactly half S ¹ ₂ D the job remains after 5 minutes. Now, in each answer

choice, substitute 10 and 5 for m and k, respectively, to see which one gives you a value

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