Again,im not quite sure that i understand what youre asking,will you please specify so that i may answer
Work out length of one second by dividing by 525600, then multiply that answer by 8.333. Answer should be 93026473.1507 miles
The other endpoint would have to be (-5,2), going off the definition of a midpoint. Since 3 is for units to the right of -1, that would mean that the other end point would have to be 4 units to the left, which is -5.
The absolute value of a number is how many digits away from zero it is, the actual value includes negative numbers while absolute value numbers do not include negatives
hope this helps!