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icang [17]
3 years ago
6

What is the area of the trapezoid? A. 24 mm2 B. 26 mm2 C. 32 mm2 D. 40 mm2

Mathematics
1 answer:
miss Akunina [59]3 years ago
6 0

Answer:

A= 24 m

Step-by-step explanation:

The formula for the area of a trapezoid is  A= \frac{a+b}{2} x h.

Using the formula you plug in the values:  

A= \frac{4 + 12} 2} x 3

2. Now you simplify the equation and solve

A = \frac{16}{2} x 3

A = 8 x 3

A = 24

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P-value test and Ctitical Value test are identical. P-value and Critical value are two different names for the same steps. They
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Answer:

Option B - False

Step-by-step explanation:

Critical value is a point beyond which we normally reject the null hypothesis. Whereas, P-value is defined as the probability to the right of respective statistic which could either be Z, T or chi. Now, the benefit of using p-value is that it calculates a probability estimate which we will be able to test at any level of significance by comparing the probability directly with the significance level.

For example, let's assume that the Z-value for a particular experiment is 1.67, which will be greater than the critical value at 5% which will be 1.64. Thus, if we want to check for a different significance level of 1%, we will need to calculate a new critical value.

Whereas, if we calculate the p-value for say 1.67, it will give a value of about 0.047. This p-value can be used to reject the hypothesis at 5% significance level since 0.047 < 0.05. But with a significance level of 1%, the hypothesis can be accepted since 0.047 > 0.01.

Thus, it's clear critical values are different from P-values and they can't be used interchangeably.

8 0
3 years ago
You are going to create a circle graph to represent some data. How many degrees should a section representing 65 out of a hundre
hjlf

To figure out the degrees, you would create a ratio.

Since there are 360 degrees in your circle, that would be representative to 100 (because both are the total of what you want to find), and x would be representative to what degrees 65 is equal to.

your ratio should look like,

65/100=x/360

cross multiply and get

65(360)=100x

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x=234


It looks hard to read like this, but if you write it out on your paper it should make more sense!

8 0
3 years ago
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Explanation:

If I=\frac E{R+r} then taking the reciprocal gives

\frac1I=\frac1{E/(R+r)}=\frac{R+r}E=\frac RE+\frac rE

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Step-by-step explanation:

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