To calculate the maximum distance that the electric car can travel, you can use the formula:
\[ \text{Distance} = \text{Speed} \times \text{Time} \]
In this case, the speed is 70 mph and the time is 5.7 hours. Plugging in the values:
\[ \text{Distance} = 70 , \text{mph} \times 5.7 , \text{hours} \]
Calculating that:
\[ \text{Distance} = 399 , \text{miles} \]
So, the maximum distance the fully charged electric car can travel is 399 miles.