591,912 rounded to the nearest thousands = 592,000
B- the atmosphere 30,000 years ago was different than our atmosphere today
Hello :
<span>f(n + 1) = f(n) + 3
f is a arithemetic </span><span>sequence of the common difference is : 3
f(1) = -4 ( the first term)
</span><span>the next term in the sequence is : f(n) = f(1) +(n-1) d .. d=3
f(n) =-4+(n-1)(3)
f(n) = 3n -7</span>
![\frac{405}{4}= 101.25](https://tex.z-dn.net/?f=%20%5Cfrac%7B405%7D%7B4%7D%3D%20101.25)
4 goes in to 405 a total of 101 times, with a remainder of 1.
101 x 4 = 404
404 + 1 = 405
Hope that helped :)