It is 42 1/2 miles from eaton to baxter, and 37 4/5 miles from baxter to wellington. how far is it from eaton to wellington, if you go by way of baxter

Since the problem gives the number of values of how far away each Eaton and Wellington are from Baxter, you can add both of the miles together to get the total distance from Eaton to Wellington.
42 1/2+37 4/5=
Find the common denominator for both of them.
42 5/10 + 37 8/10=
80 3/10 miles from each other

Letter a i would say

7.666270253x10 raised to the 18th power