Question

What is the population of the earth in scientific notation? I know the population is approx 7.142 billion but i cant figure out the notation.

Answer 1

Found it, mate!
So can u write it with all the zeros

Answer 2

yep, its 7,142,000,000

Answer 3

is it possibly 7142*10^9?

Answer 4

Now scientific notation is how u would write numbers like this is a smaller and easier format.

It'll look something like. A x 10^n. where A is between 1 and 10

Answer 5

No, that's not right.
7142 is not between 1 and 10

Answer 6

yea i know that, i only just got your replies

Answer 7

is it possible to forget about the zeros and find the notation of 7142?

Answer 8

No, they would be 2 different numbers. U will have a 7 thousand and the other would be 7 billion

Answer 9

ok, only started notations today, think the teacher hates us

Answer 10

Should be

7.142 x 10^9

Answer 11

ill quickly check that

Answer 12

thanks so much, this really helps me out, your a great bloke

Answer 13

Here's some hint.

1.Ignore the zeros and just look at the actual numbers.
In ur case, 7142. And now you want to make it between 1 and 10 so 7.142

2. From 7.142, decide whether you go left or right to get to desired number which was 7 billion. In ur case, you had to move right 9 times.
Remember moving right=positive and left=negative

Answer 14

And your welcome!

Answer 15

ok, now i have to do the weight of an ant, so same kinda formula?

Answer 16

Yes. Not really formula, more like a process

Answer 17

ok, the weight is 0.000165345 approx.

Answer 18

so i focus on the 165345 and make it lower than ten?

Answer 19

Yes. Between 1 and 10

Answer 20

which makes it 1.65345 and move it to the left?

Answer 21

Correct

Answer 22

and because its a billionth of 1 i go 9 places to the left, which makes the notation 1.65345*10^-9?

Answer 23

No, I don't know where u got a biliionith but should be x10^-4
From 1.65345 u move the decimal place left 4 times to get 0.000165345

Answer 24

i got significant numbers mixed up

Answer 25

so its really 1.65345x10^-4 and that gives me the number 0.000165345

Answer 26

Correct

Answer 27

im getting better at this, we only had to find the notation on the internet but im doing the hard stuff

Answer 28

nikato your a genius

Answer 29

Thanks, I guess. Haha

Answer 30

Your doing pretty good yourself too

Answer 31

thanks, ill give the next one a crack and if i cant get it ill ask ok?

Answer 32

K

Answer 33

i had the width of a human hair, which is 0.00067 inches, i made the 67 below 10, which is 6.7. so i got 6.7x10^x. there are 4 places after the decimal, so that makes it 6.7x10^-4

Answer 34

Correct

Answer 35

thanks, this will get me ahead in class. i am aiming for ext 2 maths, which is the highest band in AUS.

Answer 36

thanks for the help, its extremely useful and can do these equations with ease

Answer 37

Yea, no problem. Good luck in your math