These data show the age in years of 9 members of the youth orchestra. 12 14 16 17.5 10 18 15 15.5 19 what is the iqr (interquartile range) for these data? 4.75 9.00 15.50 17.75

For how answer my question this will be the last question can you answer in math subject

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.