Does anybody know what the range of raw scores that converts into their corresponding points on the 5 point scale? Specifically for APUSH, english language, and statistics. i'm set for bio

according to a princeton review book for AP Bio i returned to my library recently...
120 M/C x .75 points for each = 90 max for M/C
4 essays x 10 points each x 1.5 multiplier = 60 max for essays
that totals to a max of 150 points on the AP Bio exam
i don't have the book with me, but it was something like:
102 (or so) - 150 = 5
82 - 101 = 4
60 - 81 = 3
40 - 59 = 2
1 - 39 = 1
(that seems like a huge range for a 5)
i think something like this would be so helpful, because now i can look at it like "ok i'm positive i won't miss more than 10 or so on the M/C, so i only have to average four 4-quality essays to get a 5"
i do find it odd that i can't seem to find this information anywhere, so if anyone is willing to share, please do so?