Estimate the circumference of a circle that has a diameter of 13 yards.
yd

Step-by-step explanation:

Circumference of a circle is πd

where d is diameter

diameter is 13 yards

Circumference of the circle is

π × 13 yd

= 13π

= 40.8yd to one decimal place

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