Answer:
8.2
Step-by-step explanation:
The distance formula is [tex]\sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}[/tex]
In this case, x_1 = 2, y_1 = 7, x_1 = 4, y_1 = -1.
We can plug in these values, getting [tex]\sqrt{(2-4)^2 + (7-(-1)^2} = 2\sqrt{17} = 8.2[/tex]