# Math Help - Find the derivative

1. ## Find the derivative

Using the power rule:

$y=0.0002{t}^{ 3} -0.4{t}^{ 2}+4+\frac{100}{{t}^{2 } }$

$y=0.0006{t}^{ 2}-0.8t-200{t}^{-3 }$

just trying to check my answer

2. Originally Posted by purplec16
Using the power rule:

$y=0.0002{t}^{ 3} -0.4{t}^{ 2}+4+\frac{100}{{t}^{2 } }$

$y=0.0006{t}^{ 2}-0.8t-200{t}^{-3 }$

just trying to check my answer
You are correct purplec16.

3. Ok...thank you

4. Although, technically, you should write

$\dot{y}$ or $y'$