Adoctor sees 210 patients every 3 weeks. at this rate, how many patients will the doctor see in 12 weeks?
a. 70
b. 280
c. 840
d. 2520

First you divide 12 by 3 to get 4, and then you multiply 210 by 4 to get 840, which is answer C. This is because if it is 210 patients per 3 weeks, 3 goes into 12 weeks 4 times, so you need to multiply. I hope this helps!

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