Answer: 6.08 units
Step-by-step explanation:
Given
Co-ordinate of Old oak tree are (1,10)
Co-ordinates of the boulder are (-5,9)
distance between them is given by distance formula
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
distance between them is
[tex]d=\sqrt{(-5-1)^2+(9-10)^2}=\sqrt{(-6)^2+(-1)^2}\\\\d=\sqrt{36+1}=\sqrt{37}\ \text{units}\\d\approx 6.08\ units[/tex]