Show that there exists a 7-ary (8,m,4)-code, where m > 200.
to the nearest whole number, calculate the best lower bound for
m = a7(8,4) as determined by the sphere covering bound.

Explanation:

Remember, you can have a credit card account without carrying any debt on it. Credit card debt is certainly a bad idea, one that can cost you a lot of money and damage your credit scores. But credit cards themselves are simply tools to buy stuff. As a credit card user, you decide whether you’ll use those tools in a manner that works for you… or against you.