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Opens on Chapter 10’s example: 60 miles an hour, in feet a second.
Enter your numbers, then press Calculate.
From the book, Chapter 10. 60 mph is 88 feet a second. A tank of 36 cubic feet holds about 269 gallons; Hana’s 52 cubic feet is 389 gallons, not 7. A 40 cubic-foot slab is 1.48 cubic yards. An Olympic pool of 2,500 cubic meters is about 660,000 US gallons.
Rounding is half up, the way the book rounds. Numbers can be typed as 1,450, $38, 12%, 1/20, 2.5 million or 3 × 10⁷. Everything stays in your browser: no sign-up, nothing stored or sent.