Math Help - Average velocity questions

1. Average velocity questions

At a time of t seconds, a particle moves a distance of s meters from its starting point, where s=4.2 sin(1.2 t).
(a) Find the average velocity (correct to four decimal places) between t=1 and t=1+h for the following values of h.
If h=0.1 then the average velocity over the time period [1,1.1] equals______m/s.
If h=0.01 then the average velocity over the time period [1,1.01] equals______m/s.
If h=0.001 then the average velocity over the time period [1,1.001] equals______m/s.
If h=0.0001 then the average velocity over the time period [1,1.0001] equals_____m/s.

This qusetion confuses me Do I just substitute the 1,1.1 into x and solve it? Any help/hints are greatly appreaciated thanks a lot !!

2. Originally Posted by letzdiscuss
At a time of t seconds, a particle moves a distance of s meters from its starting point, where s=4.2 sin(1.2 t).
(a) Find the average velocity (correct to four decimal places) between t=1 and t=1+h for the following values of h.
If h=0.1 then the average velocity over the time period [1,1.1] equals______m/s.
If h=0.01 then the average velocity over the time period [1,1.01] equals______m/s.
If h=0.001 then the average velocity over the time period [1,1.001] equals______m/s.
If h=0.0001 then the average velocity over the time period [1,1.0001] equals_____m/s.

This qusetion confuses me Do I just substitute the 1,1.1 into x and solve it? Any help/hints are greatly appreaciated thanks a lot !!
$v_{avg} = \frac{s(t+h) - s(t)}{h}$

3. Originally Posted by skeeter
$v_{avg} = \frac{s(t+h) - s(t)}{h}$

Thanks a lot Got the right answer !