For data sets having a distribution that is approximately bell-shaped, states that about 68% of all data values fall within one standard deviation from the mean. for data sets having a distribution that is approximately bell-shaped,▼the round-off rulechebychev's theoremthe empirical rulethe range rule of thumbstates that about 68% of all data values fall within one standard deviation from the mean.

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

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

do you have an easier question cause this shh is hard like theheck

step-by-step explanation: