Answer:
a. [tex]0.71\,m/s[/tex]
Step-by-step explanation:
a. We could find Angela's in metter per second then we have to convert 40 minutes to seconds then:
[tex]40\,min\times60s=2400\,s[/tex]
We know that see swim 1700 meters in 2400\,s then we just need to divide the distance by the time to find the unit rate:
[tex]\dfrac{1700\,m}{2400\,s}=\dfrac{17\,m}{24\,s}=0.71\,m/s[/tex]
b. A unit rate is used to compare different kinds of quantities, unit rate is useful to describe how many units of the first type of quantity correspond to one unit of the seconds time, examples of common unit rates are kilometers per hour, meters per hour, cost per item.
