Answer:
D
Step-by-step explanation:
Given
[tex]\frac{2a}{b}[/tex] = [tex]\frac{1}{2}[/tex] ( cross- multiply )
4a = b ( divide both sides by a )
4 = [tex]\frac{b}{a}[/tex] → D
Answer: b/a=4
2a/b=1/2
4a=b
b/a=4
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