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4 years ago

The regular price of an aquarium is $70 and the sale price is $60. what is the percent of discount? (percent of change!!)

1 answer:

3 0

Let's take the difference between the old and new (70 - 60) to get 10 and then divide this by the old (70) amount...10/70 = .142857 convert to a percent by moving the decimal 2 spaces to the right... 14.29 %

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4 years ago

Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses. Much o

emmainna [20.7K]

Answer:

The 95% confidence interval $81.852 < \mu < 280.098$

Step-by-step explanation:

From the question we are told that

The sample mean is $\= x = 180.975$

The standard deviation is $\sigma = 143.042$

The sample size is n = 8

Given that the confidence level is 95% then the level of significance is

$\alpha =( 100- 95) \%$

=> $\alpha =0.05$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }$

=> $E = 1.96 * \frac{ 143.042 }{\sqrt{8} }$

=> $E = 99.123$

Generally 95% confidence interval is mathematically represented as

$\= x -E < \mu < \=x +E$

=> $180.975 -99.123 < p < 180.975 +99.123$

=> $81.852 < \mu < 280.098$

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3 years ago

Strike441 [17]

Answer:

X=8

Step-by-step explanation:

24×10=30X

240=30X

Divide by 30

X=8

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3 years ago

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4 years ago

Of all boxes of girl scout cookies 22.5% are thin mints. If a girl scout troop sales 256 boxes of cookies how many will be thin

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Answer:

58 percent

Step-by-step explanation:

256×0.225≈58

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3 years ago