The cofactors of the first-row entries are .
1.-407,-74,227
2.-407,-68,287
3.-393,-74,287
4.-393,-68,227
The cofactors of the second-row entries are .
1.-471,222,-91
2.-471,228,-71
3.-469,222,-91
4.-469,228,-71
The cofactors of the third-row entries are .
1.249,-222,349
2.249,-217,-351
3.251,-222,349
4.251,-217,-351

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

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

contact me if you have any questions you are welcome.

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