If the function f(n) models the size of a jar that holds n marbles to be sold in a toy store, which describes an appropriate domain for the function?
a)all integers where n> 0
b)all real numbers where n> 0
c)all rational numbers where n> 0
d)all rational numbers where n> 0

Find │7│. a. 1 over 7 b. –7 c. 7 asap i always mark brailiest who me so

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?