Write the Word or Phrase That Best Completes Each Statement $t$

Write the word or phrase that best completes each statement or answers the question.
-Instruments on a satellite measure the amount of power generated by the satellite's power supply. The time $t$ and the power $\mathrm { P }$ can be modeled by the function $\mathrm { P } = 50 \mathrm { e } ^ { - \mathrm { t } / 300 }$ , where $\mathrm { t }$ is in days and $\mathrm { P }$ is in watts. How much power will be available after 378 days? Round to the nearest hundredth.