Is this the correct graphing for the inequality 2c<=400?<br> please help i’ll mark brainliest!!!

The volume of a cone is 512π/3 cm³.

Lelechka [254]

Answer:

Step-by-step explanation:

V=13Bh or V=13πr2h, where B=πr2

Did that help at all?

7 0

3 years ago

An bought a blazer for $39.90. The price of the blazer was $38. What sales-tax rate was she charged for this blazer?

trasher [3.6K]

Answer:$1.90

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Kelley ate 3/5 of her brownies on Monday and 6/8 of her brownies Tuesday. If Kelley originally had 2 brownies, what fraction bro

Sergeeva-Olga [200]

<h2>Greetings!</h2>

Answer:

$\frac{13}{20}$

Step-by-step explanation:

First, we need to add the two fractions together. To do this we need to make the denominator a factor of both 8 and 5. Easy way to do this is to multiply each fraction by the denominator of the other fraction:

$\frac{3}{5} * 8 = \frac{24}{40}$

$\frac{6}{8} * 5 = \frac{30}{40}$

$\frac{24}{40} + \frac{30}{40} = \frac{54}{40}$

We can also show 2 brownies as $\frac{2}{1}$ or $\frac{80}{40}$

Now we can subtract the two:

$\frac{80}{40} - \frac{54}{40} = \frac{26}{40}$

Simplify the fraction down by dividing by two:

$\frac{13}{20}$

Which is the fraction of brownie left!

<h2>Hope this helps!</h2>

8 0

3 years ago

I need help with these questions will give brainiest

tensa zangetsu [6.8K]

Answer:1F= f(x)=3x+1.5y

1E=18

1A domain=3 range=1.5

Step-by-step explanation:

5 0

3 years ago

A manufacturer of small appliances purchases plastic handles for coffeepots from an outside vendor. If a handle is cracked, it i

Rus_ich [418]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.1}{1.96})^2}=96.04$

And rounded up we got:

$n\approx 97$

Step-by-step explanation:

Data given and previous concepts

ME=0.1 represent the margin of error desired

Confidence =0.95 or 95%

$\alpha=0.05$ represent the significance level

z represent the quantile from the normal standard distribution

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})$

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

$z_{\alpha/2}=-1.96, z_{1-\alpha/2}1.96$

The confidence interval for the mean is given by the following formula:

$\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$

The margin of error for the proportion interval is given by this formula:

$ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}$ (a)

And on this case we have that $ME =\pm 0.1$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

Since we don't have a prior estimate for the proportion $\hat p$ we can use as estimator 0.5 and replacing into equation (b) the values from part a we got:

$n=\frac{0.5(1-0.5)}{(\frac{0.1}{1.96})^2}=96.04$

And rounded up we have that n=97

5 0

4 years ago

Is this the correct graphing for the inequality 2c<=400? please help i’ll mark brainliest!!!