How do you calulate unit rate of 510 miles per 6 hours

Josephine has a great garden with and area of 2x2 + x - 6 square feet

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

The distance between two points is 6.5cm and scale of map is 1: 1000 what's the distance between the two points