6. From RunOnline, a nonmember purchased a total of 5 items: 2 hats, 2 water bottles, and 1 workout bag. Which of the following dollar amounts is closest to the mean cost per item purchased by this nonmember?
F. $12
G. $15
H. $16
J. $18
K. $27
7. RunOnline is currently selling 100 water bottles to members each year. It was predicted that for every $0.50 decrease in the member price, RunOnline will sell 10 more water bottles to members each year. RunOnline decides to lower the member price to $10 per water bottle. Based on the prediction and excluding the onetime fee, what will be the total revenue from water bottles sold to members the year following the price reduction?
A. $1,000
B. $1,100
C. $1,400
D. $1,800
E. $2,520
8. The vertices of ΔPQR are given in the standard (x,y) coordinate plane below. What is the area, in square coordinate units, of ΔPQR ?
A. 18
B. 21
C. 36
D. 40
E. 42
9. Which of the following expressions is undefined?
10. Given that i is the imaginary unit, which of the following numbers is equal to \( (4+3i)^2 \)?
A. 07
B. 25
C. 07 + 24i
D. 08 + 06i
E. 25 + 24i