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2 years ago

How many squares can you count? A) 5 B) 4 C) 8 D) 6

Mathematics

2 answers:

Veronika [31]2 years ago

7 0

Answer:

Step-by-step explanation:

Olenka [21]2 years ago

4 0

Answer:

Step-by-step explanation:

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Write 15 cookies to 40 brownies

I am Lyosha [343]

"15 cookies to 40 brownies"

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3 years ago

Read 2 more answers

If the streets of a city are straight lines and the intersections are points, show how Principle 2 and Principle 3 might be illu

Naily [24]

Step-by-step explanation:

In the plane geometry Abeka, second edition, it is given :

Principle 2 states that between any two points, only one straight line can be drawn.

And according to principle 3 two straight lines interacts at one point only.

Thus this can be well illustrated by two straight lines which are represented by the streets of a city and these two streets intersects at a point.

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3 years ago

PTC is a substance that has a strong bitter taste for some people and is tasteless for others. The ability to taste PTC is inher

lana66690 [7]

Answer:

a) $n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

b) For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

Step-by-step explanation:

We need to remember that the confidence interval for the true proportion is given by :

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

Part a

The estimated proportion for this case is $\hat p =0.76$

Our interval is at 90% of confidence, and the significance level is given by $\alpha=1-0.90=0.1$ and $\alpha/2 =0.05$ . The critical values for this case are:

$z_{\alpha/2}=-1.64, t_{1-\alpha/2}=1.64$

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)

The margin of error desired is given $ME =\pm 0.01$ 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)

Replacing we got:

$n=\frac{0.76(1-0.76)}{(\frac{0.01}{1.64})^2}=4905.83$

And rounded up we have that n=4906

Part b

For this case since we don't have prior info we need to use as estimatro for the proportion $\hat p =0.5$

$n=\frac{0.5(1-0.5)}{(\frac{0.01}{1.64})^2}=6724$

And rounded up we have that n=6724

3 0

3 years ago

Solve the equation and show all work please show steps!!<br> 4f + 11 = 29

natali 33 [55]

4f+11=29
4f=29-11
4f=18
f=9/2

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3 years ago

Read 2 more answers

A warehouse has 784 barrels of a chemical. You require 98 barrels for one run of your process. How many barrels will be left aft

sergejj [24]

686 barrels left. If I'm not mistaken this should just be simple subtraction

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3 years ago