The Temperature $T\left({ }^{\circ} \mathrm{C}\right)$ At Distance $x(\mathrm{~mm})$ From the End of a Certain Heated Bar Is Given

Short Answer

The temperature $T\left({ }^{\circ} \mathrm{C}\right)$ at distance $x(\mathrm{~mm})$ from the end of a certain heated bar is given by $T(x)=2.0 x^{1.5}$ $+4.0 x+7.0$ . Find the rate of change of temperature with respect to distance at the point $55 \mathrm{~mm}$ from the end.