So here are my answers shown for ONLY THE FIRST QUESTION (look at photo): 1. a) D: {XER}
R: {YER}

b) D: {XER}
R: {YER | -1 < y < 1 }

c) D: {XER}
R: {YER | y > 0 }

d) D: {XER}
R: {YER}

and i want to know if i did these correct. if not, please correct me. thank you if you do

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

30,40,50 is correct answer