PSAT Math Multiple-Choice Practice Question 763
Question: 763
A typist has already typed 3,500 words of a document. How many total words, W(t), of the document will he have typed if he can type 70 words per minute and types for an additional t minutes?
Correct Answer: D
Explanation:
(D) The typist has already typed 3,500 words, so this will be a constant in the expression. The typist types 70 words per minute. So if he types for t minutes, he will type 70t more words. Therefore, the total number of words typed, W(t), is given by the following expression:
W(t) = 3,500 + 70t
Choice (D) is correct.
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