Answer:
5.9 pounds
Step-by-step explanation:
3.8 + 2.1 = 5.9
512
regular pentadecagon
it has 15 sides
that is what matches the exterior angled sum property - 360degree
let me explain it
1 side = 180 - 156 = 24
360/24 = 15
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9.8
Twenty - percent pounds
