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3 years ago

14

Worth 18points

1 answer:

svet-max [94.6K]3 years ago

8 0

D.) <span>A picnic table is on sale for 40 percent off. The original price of the picnic table is x, $144.10

It is on sale for 40% so, new amount will be 60%, and x is the sale price, so in order to calculate original price, you have to multiply them

Hope this helps!</span>

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Slope-10 pass through (2,-5)

ahrayia [7]

Slope = -10
<span>pass through (2,-5)
y = mx + b
so
b = y - mx
b = -6 - (-10) (2)
b = -6 + 20
b = 14

equation
y = -10x + 14</span>

7 0

3 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken to estimate

Hitman42 [59]

Answer:

The minimum sample size is n = 75 so that the desired margin of error is 5 or less.

Step-by-step explanation:

We are given the following in the question:

Population variance = 484

Standard deviation =

$\sigma^2 = 484\\\sigma =\sqrt{484} = 22$

Confidence level = 0.95

Significance level = 0.05

Margin of error = 5

Formula:

Margin of error =

$E = z\times \dfrac{\sigma}{\sqrt{n}}\\\\n = (\dfrac{z\times \sigma}{E})^2$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting values, we get

$E\leq 5\\\\1.96\times \dfrac{22}{\sqrt{n}} \leq 5\\\\\sqrt{n} \geq 1.96\times \dfrac{22}{5}\\\\n \geq (1.96\times \dfrac{22}{5})^2\\\\n \geq 74.373$

Thus, the minimum sample size is n = 75 so that the desired margin of error is 5 or less.

3 0

2 years ago

Henry has 3 black shirts and 7 blue shirts in his wardrobe two shirts are drawn with out replacement from the wardrobe what is t

laiz [17]

3/10 * 2/9 = 1/15
There is a 1/15 chance that both of the shirts he grabbed are black....

:)

7 0

3 years ago

20 as a percentage of 50

Y_Kistochka [10]

20:50 as 40:100
so the answer is 40%

8 0

3 years ago

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Which expression is equivalent to 81 1/3 ?

RoseWind [281]

Answer:

It's 3^3 (square root)3 aka A

6 0

3 years ago

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