Dana just finished paying off $15,400 loan she took out four years ago. The loan had 6.68% interest, compounded monthly. If Dana paid a total of $18,321.60, how much did she pay in service charges? A) $730.08
B) $366.49
C) $1,028.72
D)$266.76
Please show work.

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?