A ship travels at 20 knots (nautical miles per hour). Approximately how many regular miles per hour is this, given 1 knot ≈ 1.15078 mph?

Each knot is about $1.15078$ miles per hour, so multiply: $20\cdot1.15078\approx23.0$ miles per hour, choice H. A statute (regular) mile is shorter than a nautical mile, so the speed in regular miles per hour is a larger number than the speed in knots. Choice F ($17.4$) divides by the factor instead of multiplying. Choice G ($20.0$) does not convert at all. Choice J ($25.0$) overestimates the conversion factor as $1.25$. The answer should be a bit more than $20$.