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Step-by-step explanation:

78

Step-by-step explanation:

the five numbers are:  81, 88, 69, 65, 87. we know that to calculate the mean, you add all of the numbers together, and then divide by the number of numbers (hope that makes sense). So to calculate the mean of

81, 88, 69, 65, 87, we can add them all together first, and get 390. since there are 5 numbers we wish to calculate the mean of, we will divide 390 by 5 to get our answer, 78

the total estimated nappy use.=10,500,000

step-by-step explanation:

given that on an average the average baby uses 3528 napkins.

in a particular year 2014, the number of births were 299697 in new south wales.

rounding off the number of births to the nearest hundred thousand we have

no of birtsh = 300000

also rounding off the average usage to nearst thousand we get

average use of a baby = 3500

hence total number of nappy estimated to be used = 3500x300000

= 10,500,000

answer is 10,500,000 nappies

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation