Corn is an excellent energy feed, and is ideal for finishing feeder pigs because it is high in digestible carbohydrates, low in fiber, and is very tasty feed for pigs to pigs! But corn alone will not keep pigs growing and healthy. Corn must be supplemented with Pig(s) food(s) vitamins to keep pigs healthy.
Pi is the ratio of a circle's circumference to it's diameter. The resulting number is the reason there cannot be a perfect circle. It's value is approximately 3.142 which, rounded up to the nearest whole number, would be four. It would not be three, as that would be rounding down.
When rounding to the nearest ten, if the last digit ends with 1, 2, 3, or 4, round to the next number that is smaller than the number given and ending with a zero. For instance, round 43 to the nearest ten.The last digit is 3, so the next number smaller than 43 with an ending of zero is 40.