Answer:
A. 10%
Step-by-step explanation:
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87.8
87 + 80 + 96 + 94 + 88 = 439
439 ÷ 5 = 87.8
B
32 and 4
128=2^7
(8xa)xb=128
axb=2^4=16
(8x4)x4=128