The expenditures control account of a government is debited when the budget is recorded. supplies are ordered. supplies previously encumbered are received. the invoice is paid.

answer; is usually (less than) the socially optimal level of consumption;

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants

answernaturalistic observation;