Assuming you mean the arithmetic mean, it is 80.
It isn't. The square of any real number is positive. (negative 9)2 = positive 81. Did you mean negative (92) ? Well, 92 = 81, and the negative of that is negative 81.
81 is not prime it's a composite number
Eighth letter is :H. First is one= lettera
81 is not a prime number. 81 = 3 * 3 * 3 * 3
34 =81 so I think you mean 3
No, 81 is an odd number.
If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers
Assuming you mean the arithmetic mean, it is 80.
It isn't. The square of any real number is positive. (negative 9)2 = positive 81. Did you mean negative (92) ? Well, 92 = 81, and the negative of that is negative 81.
The square number of 81 is 9. 9 x 9 = 81
81 is not prime it's a composite number
Eighth letter is :H. First is one= lettera
81 is not a prime number. 81 = 3 * 3 * 3 * 3
No, -81 is not an irrational number because it can be represented in the form x/y = -81
It is a composite number, you can get 81 by mulitpling 1*81, 3*27, and 9*9.compositeNo the number 81 is not prime it can be divided by nine.composite
It depends on what average you want to find. To find the mean of 81, 81, 98, and 91 add the numbers together and divide by 4 (the number of numbers you added). 81 + 81 + 98 + 91 = 351 351 divided by 4 = 87.75. To find the median, list the numbers in order and find the one in the middle. 81, 81, 91, 98 81 and 91 are in the middle. To find the mode, look for the number that appears the most, 81 appears twice and the other numbers appear once. 81 is the mode.