Liz estimated 228 + 7 to be between 30 and 40. Which basic facts did she use to help her estimate? Mark all that apply.

A 20 + 5

B 21 - 7

© 28 + 7

D 30 + 5

step-by-step explanation:

12475909

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