Ira bought a tennis racquet that cost $112. The sales tax rate is 9 percent. What is the total amount that she paid?
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Answer:
The number of people needed is
Step-by-step explanation:
From the question we are told that
The population proportion is
The margin of error is
From the question we are told the confidence level is 90% , hence the level of significance is
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Generally from the normal distribution table the critical value of is
Generally the sample size is mathematically represented as
=>
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