Answer:
Step-by-step explanation:
In 1968, vehicle emission standards allowed 6.3 hydrocarbons released per mile driven and by 1980, the
standards allowed only 0.41 hydrocarbons per mile driven. This means that the change in the amount of hydrocarbons released per mile driven as allowed by the vehicle emission standards between 1968 and 1980 is
6.3 - 0.41 = 5.89
Therefore, the percentage rate of change in the amount of hydrocarbons released per mile driven as allowed by the vehicle emission standards between 1968 and 1980 would be
5.89/6.3 × 100 = 93.49%
