00:01
In this problem, we are using the position function to find the average velocity.
00:07
So the average velocity of a function is the position over an interval a to b is the position at b minus the position of a over b minus a.
00:26
So that's how you find average velocity.
00:28
Okay, so we just need to plug in the corresponding value.
00:39
So for part a, you got s of 3.
00:44
So let me just evaluate that.
00:49
And then we'll plug that into the average velocity formula.
00:54
So s of 3 is negative 4 .9.
00:57
Okay, negative 4 .9 times 3 square plus 31 times 3 plus 16.
01:19
And that gives me 64 .9.
01:25
S of 0 is going to be 16 because the first two terms canceled out.
01:35
So you got 16...