...north again ... ? Katrina hikes 5 miles north, 7 miles east, and then 3 miles north again. To the nearest tenth of a mile, how far, in a straight line, is Katrina from her starting point?
Please help me! And no mean comments like, "Do your own homework." I really need help. Explanations are most welcome.
Thank you!
Please help me! And no mean comments like, "Do your own homework." I really need help. Explanations are most welcome.

Thank you!