52. Noah’s car has run out of gasoline. He walks 15 km west and then 8 km south looking for a gasoline station. If he is now h km directly from his starting point, find the value of h.
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Use the Pythagorean theorem
H = sqrt (8^2 + 15^2)
H = sqrt(64 + 225)
H = sqrt(289)
H = 17 km