The distance between two cities is 180 km. the distance was covered by a car at a rate of 50 km/h, by a bus at 45 km/h, by a truck at 40 km/h, and by a bicycle at 25 km/h. how long did each take to travel the entire distance? are speed and time directly proportional or inversely proportional? what is the constant of variation?
i only need the constant variation ! will mark brainliest if answered

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

step-by-step explanation:

the answer is 89 d

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