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As A school librian
Purchase 10 ?
27
assorted books during the first
month of contract from an
publisher, 15 in the second
20 in the
moth
third month 25 in the
fourth month and so on the
brian wants to know the total
number of books the school will
have acquired after 30 a month 1-21
Nose that sequence is 10, 15
201205.
ORIONS