The answer is 13.0 for the distance between Samantha and Mia after 1 hour.
The answer is translation
Midpoint = (8-5),(-3-9) / 2
= (3,-12)/2
= (3/2,-6)
15 quarters= $3.75
21 nickels =$1.05
______________
36 coins = $4.80
you can use a calculator to try and multiply all of them so multiply 6x4 and then it will give you the answer then once you have that answer multiply it with the 4 im pretty sure but if not then sorry