Answer:
$639.2
Step-by-step explanation:
sp = 80% of cp
= 0.8 x 799
= 639.2
8
16=x
16 square root is 4
16=4
x2
(4)2= 8
$0.28
12
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As a = 0 , there is no sign . Its only 0. Thus the answer is (c)
