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3 years ago

HURRYYYYY ITS DUE IN 20 MINUTES

Mathematics

1 answer:

dedylja [7]3 years ago

3 0

Step-by-step explanation:

Volume of cylinder

πr²h = π×(12)²×(18)

Choco : Vanilla : Strawberry

3 : 2 : 1

to find volume of strawberry,

$\frac{1}{6} \times volume \: of \: cylinder$

then use your calculator

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Use algebraic rules of equations to predict the solution to the system of equations. Include all of your work for full credit.

dolphi86 [110]

X+2y=10
x=10-2y

6y=-3(10-2y)+30
6y=-30+6y+30
0=0

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3 years ago

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Help QUICKLY.

mel-nik [20]

Hope this helps!!!!!!!!!

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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.

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2 years ago

Multiply out and simplify: (x + 6)(x - 2)

Gwar [14]

Answer:

x squared+4x−12

Step-by-step explanation:

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Which expression is equivalent to

kolbaska11 [484]

It is

$\frac{(2a+1) ^{2} }{50a}$

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