Answer:
Circumference : 18.84 inches
Radius: 3 inches
C. 2.5 hours
95 miles/x h = 38 miles/h
x = (95 miles/h)/(38 miles) = 2.5 hours
For this case, the first thing we must do is define a variable.
We have then:
p: rate in miles per hour for the last 1.5 hours
We now write the equation that models the problem.
We have then:
![(0.5) * (5.5) + 1.5p = 13.25 ](https://tex.z-dn.net/?f=%280.5%29%20%2A%20%285.5%29%20%2B%201.5p%20%3D%2013.25%0A)
Rewriting we have:
![2.75 + 1.5p = 13.25 ](https://tex.z-dn.net/?f=2.75%20%2B%201.5p%20%3D%2013.25%0A)
From here, we clear the value of p.
We have then:
Answer:
DeAngelo's rate for the last 1.5 hours of his run is 7 miles per hour.