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2 years ago

Mrs. Crandall spent $42 on window shades that were on sale for a certain percent

Mathematics

2 answers:

Paha777 [63]2 years ago

8 0

Answer:

60 percent

Step-by-step explanation:

70*60/100=42

70*0.6=42

60 percent is the answer

hope this helps!

please mark my answer as brainliest. Thanks!

Paha777 [63]2 years ago

7 0

Answer:

The percentage of the discount is 40%.

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If the sum of squares for a sample containing 51 items equals 200, what is the standard deviation?

Mashcka [7]

The standard deviation is 1.98. Option A is correct.

The standard deviation formula is given as

$\sigma = \sqrt{\frac{SS}{n} }$

where:

SS is the sum of squares = 200
n is the sample size = 51

Substitute the given parameters into the formula to have:

$\sigma = \sqrt{\frac{200}{51} }\\\sigma = \sqrt{3.922}\\\sigma = 1.980$

Hence the standard deviation is 1.98

Learn more on standard deviation here: brainly.com/question/12402189

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1 year ago

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Rina8888 [55]

Step-by-step explanation:

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2 years ago

Assume a recent sociological report states that university students drink 5.10 alcoholic drinks per week on average, with a stan

Lerok [7]

Answer:

Mean of sampling distribution = 5.10 alcoholic drinks per week

Standard deviation of the sampling distribution = 0.11

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 5.10 alcoholic drinks per week

Standard Deviation, σ = 1.3401

Sample size, n = 150

a) Mean of sampling distribution

The best approximator for the mean of the sampling distribution is the population mean itself.

Thus, we can write:

$\mu_{\bar{x}} = \mu = 5.10$

b) Standard deviation of the sampling distribution

$=\dfrac{\sigma}{\sqrt{n}} = \dfrac{1.3401}{\sqrt{150}} = 0.11$

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2 years ago

12% of 72 is what number ?

valina [46]

The best thing to do here is to find 1%, then multiply this by 12.
72/100= 0.72
0.72*12= 8.64
Therefore, 12% of 72 is 8.64
Hope this helps :)

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2 years ago

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In science class, Priscilla heats water and measures the temperature of the water every 2 minutes\or data are shown in the table

Dima020 [189]

Answer:

37.5 °C

Step-by-step explanation:

The temperature appears to be increasing linearly at the rate of 5 °C in 2 minutes, or 2.5 °C per minute.

1 minute after 4 minutes, when the temperature is 35 °C, we expect it to be 2.5 °C higher, or 37.5 °C.

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2 years ago