A map has a scale of 3cm represents 1500 meters (a) Write this scale as a ratio in its simplest form.
(b) What is the actual length of a road measuring 12.5 cm on the map?
Give your answer in km.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c