Answer:
D.) 39
Explanation:
The Pythagorean theorem states
a^2 +b^2 = c^2 where a and b are the legs and c is the hypotenuse
15^2 +36^2 = x^2
225+ 1296= x^2
1521 = x^2
Take the square root of each side
sqrt(1521) = sqrt(x^2)
39 =x
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