Suppose that a person is taking a walk along a long straight path and walks at a constant rate of 2.8 miles per hour. Below is a graph of the velocity function $v(t)=2.8$.

How far did the person travel in the first 3 hours?
Distance: miles

How is this distance related to the area of a certain region under the graph of $y=v(t)$?

Find an algebraic formula $s(t)$ for the position of the person at time $t$, assuming that $s(0)=0$.
$s(t) =$