Answer:
5.7km
Step-by-step explanation:
-let the drive east be the base of our 'triangle' and the drive north be the height, h.
-The distance from the parents to the grandparents, 9km, forms the hypotenuse.
#Using Pythagorean Theorem, we can find the distance to her grandparents as:
[tex]H^2=h^2+b^2\\\\9^2=7^2+b^2\\\\b^2=81-49\\\\b=\sqrt{32}\\\\=5.657\approx5.7\ km[/tex]
Hence, the distance fro Hayley's place to her grandparents is 5.7km
