Use an app called Socratic, take a photo of the questions you're stuck on, then it will help you in stages and show you the answer.
Answer: picture pleasee
Step-by-step explanation:
Answer: Simple interest= Principal× rate× time/ 100
Amount= Simple interest + Principal
Step-by-step explanation:
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a )


Two solutions.
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b )


One solution .
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c )


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d )


One solution.
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e )



Two solutions.
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f )


Two solutions .
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Answer:
9
Step-by-step explanation: