What is the taxidistance between a(3,5) and b(8,4) options: 7 2 8 6

To solve this problem, we need to use the taxidistance formula  such as  |x2-x1| + |y2-y1|
Point A (3,5) where x1 =3 and y1=5
Point B (8,4) where x2=8 and y2=4
The solution is shown below:
d = (8-3) + (4-5)²
d = 5 + |-1|
d = 5 + 1
d = 6

The answer is "6".

$250 deductible means jane must pay the first $250 of her bill. so the insurance company paid = (80% of bill) - deductible = (0.8 x $2550) - $250 = $2040 - $250 = $1790 and jane's cost is = (bill) - (insurance payment) = $2550 - $1790 = $760