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All Multiplying Big and Small

Source: 2017 AMC 8 #4

November 22, 2017
AMCAMC 8AMC 8 2017

Problem Statement

When 0.000315 is multiplied by 7,928,564 the product is closest to which of the following? <spanclass=′latex−bold′>(A)</span>210<spanclass=′latex−bold′>(B)</span>240<spanclass=′latex−bold′>(C)</span>2100<spanclass=′latex−bold′>(D)</span>2400<spanclass=′latex−bold′>(E)</span>24000<span class='latex-bold'>(A) </span>210\qquad<span class='latex-bold'>(B) </span>240\qquad<span class='latex-bold'>(C) </span>2100\qquad<span class='latex-bold'>(D) </span>2400\qquad<span class='latex-bold'>(E) </span>24000
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