## Basic College Mathematics (10th Edition)

Published by Pearson

# Chapter 7 - Measurement - 7.4 Problems Solving with Metric Measurement - 7.4 Exercises - Page 507: 7

#### Answer

It takes 71 beats to pass all the blood through the heart.

#### Work Step by Step

Convert L to mL by moving the decimal. 5L=5000mL Use ratios and cross multiplication to find the number of beats. $\frac{1beat}{70mL}=\frac{x beats}{5000mL}$ $70x=(1)(5000)$ $70x\div70=5000\div70$ $x=71.4$

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