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Gnesinka [82]
3 years ago
10

The sales tax for an item was $15.60 and it cost $390 before tax. Find the sales tax rate. Write your answer as a percentage.

Mathematics
1 answer:
labwork [276]3 years ago
7 0

Answer:

15.60 times 100 divided by 390=4%

Step-by-step explanation:

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Look at the histograms of real estate data and decide whether you think the standard deviation of home prices in City A was larg
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Answer:

The description according to the framework in question is illustrated in the portion below.

Step-by-step explanation:

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To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil
Fiesta28 [93]

Answer:

The sample has not met the required specification.

Step-by-step explanation:

As the average of the sample suggests that the true average penetration of the sample could be greater than the 50 mils established, we formulate our hypothesis as follow

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H_a: The true average penetration is > 50 mils

Since we are trying to see if the true average is greater than 50, this is a right-tailed test.

If the <em>level of confidence</em> is α = 0.05 then the z_\alpha score against we are comparing with, is 1.64 (this is because the area under the normal curve N(0;1) to the right of 1.64 is 0.05)

The z-score associated with this test is

z=\frac{\bar x-\mu}{s/\sqrt{n}}

where

\bar x = <em>mean of the sample</em>

\mu = <em>average established by the specification</em>

s = <em>standard deviation of the sample</em>

n = <em>size of the sample</em>

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3 years ago
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ololo11 [35]

Answer:

18.84

Step-by-step explanation:

The formula for length of the circle is =

\pi \times d

Therefore

\pi \times d = 3.14 \times 12 \\  =  37.68

Therefore the Arc length =37.68/2

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8 0
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