Grade 8 math, can someone help me?

The United Nations declared October 12 1999, as The Day of 6 Billion. According to experts, the population of the world reached 6 billion on this day.














D. Nicolai said that 6 billion can represent the volume of a cube.


How many units long is the cube? How do you know?





E. Jay said that 6 billion people could stretch around earth at the


equator more than 200 times. Show why his claim makes sense.


(The distance around the equator is about 40 000 km.





F. Think of two other ways to describe the number 6 billion. Which way do you think is most interesting? why?|||D) 6,000,0000,000 = x^3


Really the only way to solve for x(one side of the cube) is to take the cubed root of 6,000,000,000. On a calculator enter it as (6,000,000,000)^(1/3) = 1 817.12059





E) 1 km is roughly 3,280 feet. So in feet the distance around the equator is about 131,233,596 feet. Now multiplying this number by 200, since you must do it 200 times give you 26,246,719,200 So, this is the total number of feet humans must cover and there is 6,000,000,000 of us to do so. Therefore dividing 26,246,719,200 by 6,000,000,000 would give us the average arm span of a human to perform this and you get 4.37 feet which is very reasonable. Had you gotten 40 feet obviously the average human arm span is nowhere near that.





F. 6 billion is 6,000 millions - interesting because 1 million is already huge so imagine 1,000 of them


6 billion is 6 million thousands - same thing





also, not a rip on you at all but more on your teacher...this assignment just seems silly... it isn%26#039;t that hard but really? you should be learning algebra or something of importance in 8th grade


|||For D we don%26#039;t have enough information to solve the question (sorry)


For E you need to convert kilometers into feet and divide by 6 billion. You should then get around 200 if that guy estimated correctly.


For F find out something weird like how many skittles that would be or something and then someone whose net worth is 6 billion.|||D. let x be the length of cube


so x^3 = 6 billion (since x=length, x=width, x=height)


take cube root of 6 billion to get the length of cube





E. 6 billion / 400, 000, 000 m = 150 (not sure though)





F. well there are 6 billion stomachs on the planet


i can draw a huge circle of 14800m radius|||WTF, im in highschool and I didnt even learn that? you sure thats 8th grade math?