00:01
Here, we're given the position of a particle for a given time as s of t.
00:05
And we want to find the average velocity over the particle time interval from 8 to 11.
00:13
So if i want to find the average velocity, that's going to be the slope between two points, which in general, the slope is just change in y over change in asks.
00:22
So that's just going to be s at the end point of 11 minus s at 8.
00:28
That's the change in y, and then the change in x is 11 minus 8.
00:31
8.
00:33
So really, we just need to find what is s of 11.
00:36
So i'm just going to type that in the calculator.
00:40
So 11 cubed and then multiply by 4 will give me 53, 40, 534.
00:48
And then if i plug in 8, i'm going to do the same thing.
00:51
8 cubed and then times 4 gives me 2048.
00:55
And then 11 minus 8...