The area of a square piece of cardboard is 81 square inches. What is the length of the cardboard?
1 answer:
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Answer: 4950
Step-by-step explanation:
The number of possible combinations of n things taken r at a time is given by :-
Total nonnegative integers less than 100 ={0,1,2,... ,99} = 100
So, the number of combinations of choosing 2 out of them =
So, the number of ways to choose a set of two nonnegative integers less than 100 = 4950
