How many combinations of a president, vice-president, secretary, and treasurer can be chosen from a group of 12 students?
a. 11,880
b. 95,040
c. 665,280
d. 3,991,680

11,880

Step-by-step explanation:

nPr = n!/(n-r)!

12P4 = 12!/(12 - 4)!

12P4 = 12!/8!

9 * 10 * 11 * 12

(In case anyone else gotten confused like I did at first)

A. 3 x W - 23

Step-by-step explanation:

Profit is equal to money made minus costs

Let P equal profit.  We know the costs were 23, and they made 3 dollars per cookie.  If they sold W bags of cookies, the money made is 3*W

P = 3*W - 23