Answer
$$0.06\ \text{amperes.}$$
Work Step by Step
Since $v(t)$ is a line with slope $0.5 $, $v^{\prime}(t)=0.5$ volts/s for all $t .$ From the formula, we get:
\begin{align*}
i(3)&=C v^{\prime}(3)+ (1 / R) v(3)\\
&=0.01(0.5)+(1 / 100)(5.5)\\
&=0.005+0.055\\
&=0.06\ \text{amperes.}
\end{align*}
