Find the indicated derivative.
$d/dx\left(\pi\right)$

Airplane takeoff Suppose that the distance an aircraft travels along a runway before takeoff is given by D = (10/9)t², where D is measured in meters from the starting point and t is measured in seconds from the time the brakes are released. The aircraft will become airborne when its speed reaches 200 km/h. How long will it take to become airborne, and what distance will it travel in that time?

Find the indicated derivative.

$f(x)=3x-4$

$f^{\prime}(x)=$

Find the indicated derivative.

$d/dt(-5t)$

Find the indicated derivative.

$d/dt(-5x)$

Find the indicated derivative.

$f(x)=6x^4-4^3$

$f^{\prime}\left(x\right)=$

Find the indicated derivative.

$d/dt(5-7t^{-3})$

Find the indicated derivative.

$y=\frac{5}{2}{x}^5+2x^3+6x-\frac{\surd 3}{4}$

$y^{\prime }=$

Find the indicated derivative.

$h\left(t\right)=\frac{1}{2}{t}^3+\frac{4}{t^2}+3\sqrt{t}$

$h^{\prime }\left(t\right)=$