Moderate# Voltage on a Charging Capacitor

EANDM-@PIYRY

In the RC circuit below the capacitor is initially uncharged. At time $t = 0 \:\text s$ the switch is closed and the capacitor begins to charge. The circuit parameters are: $\Delta V = 12 \:\text V$, $R = 120 \:\text M \Omega$, $C= 30 \: \text {pF}$.

What is the voltage across the capacitor at $t = 4.5 \:\text {ms}$?