Question

Michelle is scuba diving. Her position changes from -2.1m to -38.6m in 6 1/4 min. What is the average change in Michelle's position each minute?

Answer 1

Answer: 5.824 m / min

Step-by-step explanation:

Change in position = -2.1m to -38.6m

Distance = |-38.6 m - (-2.1m) |

=|-36.5| m

= 36.5 m

Time = $6\dfrac14\ min=\dfrac{6\times4+1}{4}\ min$

$=\dfrac{25}{4}\ min$

The average change in Michelle's position each minute = $\dfrac{36.5}{\dfrac{25}{4}}\text{ m/min}$

$=\dfrac{36.4\times4}{25}\text{ m/min}\\\\= 5.824\text{ m/min}$

Hence, the average change in Michelle's position each minute = 5.824 m / min