John let out 50 foot of kite string when he observes that his kite is directly above a point on the ground 30 feet away from him, how high is the kite ?

40 ft is correct. c2 = a2 + b2; 502 = 302 + b2; 2500 = 900 + b2; b2 = 1600; b = 40 ft.

40

40

good

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12 but only if you subtracr by the gcm

Time for the Pythagorean Theorem!

30*2 + h^2 = 50^2

900 + h^2 = 2500

h^2 = 1600

h = 400