Answer:
30/100 X 105 = 31.50
they pay $31.50
D.
Step-by-step explanation:
I hope this helps
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Answer: 9+(3)(2)
=15
9+(3)(2)
=9+6
f(a,b) = 2(a+b)
f(2,3) = 2(2+3)
f(2,3) = 2(5)
f(2,3) = 10