For his yearly vacation, colton plans to spend $350 on train tickets, $200 on food, $150 on accommodations, and $50 on miscellaneous expenses.

Step-by-step explanation:

In this question, we are tying to find his entire budget. So add everything he has planned to spent, then divide by 12 months.

Divide by 12 months.

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