00:01
In 2004, about 95 billion pounds of sulfuric acid were produced in the u .s.
00:09
Convert to tons.
00:15
So 95 billion is 95, one, two, three, or 9 .5 times 10, 2, 2, 1, 6, 7, 8, 9, 10.
00:31
And that's how many pounds we had.
00:35
We know that there are 2 ,000 pounds in one ton.
00:42
So we are going to take 9 .5 times 10 to the 10th and divide that by 2000.
00:58
And we get 4 .75.
01:03
I'm going to make that 4 .7.
01:05
I haven't read your books rounding...