Question

The world population in the year 2011 was approximately 7 x 109 people. If the population doubles in 100 years, how many people will be on the earth in the year 2111? Write your answer in scientific notation.

Answer 1

2111 is 100 years after 2011 so 7 x 10^9 will double

so just multiply \[7 \times 10^9 \times 2\]
what does that give you?

Answer 2

nightmares

Answer 3

1260

Answer 4

how did you get that?

Answer 5

7*90*2

Answer 6

it's not 90...it's 10^9

Answer 7

those are very different

Answer 8

just multiply 7 and 2 then copy "x10^9" to get the answer

Answer 9

okk thanks

Answer 10

welcome

Answer 11

:)