Answer:
15
Explanation:
You want to know the number of purple T-shirts when the circle graph for 100 shirts shows purple shirts in a sector of 54°.
Circle graph
In a properly made circle graph, the central angle of a sector is proportional to the value that sector represents.
If the whole graph represents 100 T-shirts, then a sector of 54° will represent the fraction (54°/360°) of those 100 shirts.
purple shirts = (54°/360°)×(100 shirts) = 15 shirts
Trenton's scouting group made 15 purple T-shirts.