Answer
$2.646 * 10^{11}$ white blood cells
Work Step by Step
$2.7 *10^{4}* 7*10^{4}*140$
$2.7 * 7 * 140 * 10^{8}$
$18.9 * 140 * 10^{8}$
$2646 * 10^{8}$
$2.646 *1000 * 10^{8}$
$2.646 * 10^{3}*10^{8}$
$2.646 * 10^{11}$
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