To round up to nearest whole number, we have to see the tenth place.
If the value of the tenth place is greater or equal to 5, then we round up the number to 10. If the value of the tenth place is less than 5, the we round up the number to 9.
The value of the tenth place is 4, which is less than 5, we will round up the number to 9.
The distances from Boston to New York and New York to Boston stayed the same. Going was 45mph and returning was 65mph. The average would just be the sum of the two, divided by 2