SAT Mathematics Practice Test 3

Because Nate walks 25 meters in 13.7 seconds, and 4 minutes is equal to 240 seconds, the proportion $\frac{25\text{ meters}}{13.7\text{ sec}} = \frac{\text{x meters}}{240\text{ sec}}$ can be used to find out how many meters, x, Nate walks in 4 minutes. The proportion can be simplified to $\frac{25}{13.7} = \frac{x}{240}$, because the units of meters per second cancel, and then each side of the equation can be multiplied by 240,giving $\frac{(240)(25)}{13.7} = x \approx 438$ Therefore, of the given options, 450 meters is closest to the distance Nate will walk in 4 minutesChoice A is incorrect and may be the result of setting up the proportion as $\frac{13.7\text{ sec}}{25\text{ meters}} = \frac{\text{x meters}}{240\text{ sec}}$ and finding that $x \approx 132$, which is close to 150. Choices C and D are incorrect and may be the result of errors in calculation.