The lengths of most older U.S. swimming pools are multiples of yards. Generally 25 yards. However, newer pools are 25 or 50 meters long. Suppose an American swimmer is practicing for a 400-meter race. Explain how you got your prediction and how close is it? That is, how much shorter is 400 yards than 400 meters? First predict the amount, using only mental math. Keep your prediction in your head.
Each yard is a little less than $$3 \frac{1}{3}$$ inches less than a meter, so 400 yards would be about $$3 \frac{1}{3}$$ inches x 400 = 1,440 inches less than 400 meters. Then notice that 1,440 inches = 1,440 inches. Since 400 yards is 1,440 inches less than 400 meters, we would expect the answer to be slightly less than this.
1,440 inches = ______ feet = ______ yd
Determine the amount (to the nearest yard).
______ yd