So... 0.170
0.165.
So at first it was 0.17. But if you add that imaginary 0 its 0.170. So now the answer is 0.170. Hope this helps! ;)
First observe that if 
,
Let 
and 
. It follows that
Now let 
, so 
. Solving for 
,
which means
Now solve for 
.
(note that we assume 
)
(we omit 
since 
is not true)
So we have 299790000, we want to have only one digit in front of the decimal, 2.9979x10^9
hope this helps :)
This is social studies put it i. Math don’t mean to be mean
