plz help Each winter, ice covers a lake. During this time, fish in the lake have a smaller food supply. What kind of disturbance is this? A. Cyclical B. Catastrophic C. Large-scale D. Small-scale

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