6 billion x 4 = 24 billion ft2
Interestingly enough, with 27,123,264 ft2 in one square mile, everyone on the planet could be given their 4 ft2 in Luxembourg with 14 mi2 to spare!!!
10 times
72
Eight Feet will give each person plenty of room
First person shakes hands 19 times, second person 18 etc, a total of 190.
7,000 / 80 = 87.5There's room for 87 people, with 40 square feet left over.
Training in how to make saddles. I would imagine a person could become an apprentice to a person who does this.
As of October 2014 the population of the planet is ~7.125 billion.
Well, there are about 10 billion chickens and 6 billion people so 10,000,000,000:6,000,000,000
0.0043
68.1 sq ft.
the current world grain harvest is 1.85 billion tons.even if this harvest were expanded to 2 billion tons in the future ,it could support 10 billion people who eat like a typical indian,or 2.2 billion people with the average diet of a person living in united states
3.5
Imagine lining 7 people in a row. You have 7 people to choose from for the first person and 6 people to choose from for the second person and so on and so on , so answer=7x6x5x4x3x2x1
there are just over 6 billion people living on earth today
0.005
0.019
0.028