If the Earth were a flat surface, then 9 miles east and 12 miles north would be the basis of a right triangle, and the straight-line route would be the hypotenuse. We could use the Pythagorean Theorem to find the straight-line distance.
A² + B² = C²
C² = (9)² + (12)²
C² = 81 + 144
C² = 225
C = √225 = 15 miles
That's Choice-'H'.
if this is drawn out then the distance and the 9 miles east and 12miles north make a right-angled triangle. We can then use pythagoras' theorem. a^2+b^2=c^2 so 9^2+12^2=hypoteneuse^2 so 81+144=h^2 h^2=225 h=15 so the distance is 15km
The distance from the departure point to the oil rig can be found using the Pythagorean Theorem. After calculations, we find that the distance is 15 miles. Therefore, the correct answer is Choice C.
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