Write the Word or Phrase That Best Completes Each Statement $$\mathrm { F } ( \mathrm { t } ) = 1 - \mathrm { e } ^ { - 0.2 \mathrm { t } }$$

Write the word or phrase that best completes each statement or answers the question.
-Between 8:30 a.m. and 9:30 a.m., cars drive through the Cappuccino Express at a rate of 12 cars per hour (0.2 per
minute). The following formula from probability can be used to determine the probability that a car will arrive within t
minutes of 8:30a.m. $$\mathrm { F } ( \mathrm { t } ) = 1 - \mathrm { e } ^ { - 0.2 \mathrm { t } }$$ Determine how many minutes are needed for the probability to reach 0.6.