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Dmitrij [34]
3 years ago
7

What is the total area, in square inches, of the shaded sections of the trapezoid below?

Mathematics
2 answers:
postnew [5]3 years ago
7 0

Answer:

A = 31.92 in^2

Step-by-step explanation:

Area of a triangle is 1/2(b*h)

So, you would take 1/2(5.4 * 4.8) + 1/2(7.9 * 4.8) which gives you 31.92

slamgirl [31]3 years ago
6 0

Answer:

area of the shaded region of trapezoid = 31.92 in²

Step-by-step explanation:

area of both the shaded triangle = 12.96 + 18.96 = 31 .92 sq inches

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Alex wants to test the reliability of “lie detector tests,” or polygraph tests. He performs a polygraph test on a random sample
VladimirAG [237]

The correct statement is test is reliable and authentic as the probability of no false positives is more than 0.5

Given that

H_o:P= 0.50\\\\H_1:P>0.50

Now following calculations to be done to reach out the conclusion

There is no false positive as

= 100 - 5.5

= 94.5%

\hat P =0.945, n = 12

Now

z = \frac{\hat P - P}{\sqrt\frac{P(1-P)}{n} }\\\\=\frac{0.945-0.5}{\sqrt\frac{0.5\times0.5}{12} }  \\\\= 3.08

So

P value = P(z >3.08) = 0.0010

Therefore we can conclude that test is reliable and authentic as the probability of no false positives is more than 0.5

Learn more about the polygraph test here:

brainly.com/question/3790493

4 0
3 years ago
From midnight to 6 am , the temperature rose 8C. at 6am, the temperature was -20c. what was the temperature at midnight?
murzikaleks [220]
Take -20 - 8 = -28 C. the temperature at midnight
7 0
3 years ago
Find the area of the image below
DochEvi [55]

Look at the picture.

The area of a parallelogram:

A_P=5\cdot3=15

The area of a triangle:

A_T=\dfrac{1}{2}\cdot5\cdot5=12.5

The area of the polygon:

[texA=A_P+A_T\\\\A=15+12.5=27.5\ u^2[/tex]

Answer: D. 27.5 square inches /inches?/ I think, correct is units

7 0
3 years ago
Anchara drops a penny from a height of 60 feet above the ground. The equation h=-16t^2 + 60 models the penbys height h i feet as
weeeeeb [17]

Answer:

t = 1.94 seconds

Step-by-step explanation:

we have to solve the following polynomial equation:

-16t² + 60 = 0

16t² = 60

t² = 60/16 = 3.75

t = √3.75 = 1.936491673 seconds

the equation also has another possible answer = -1.936491673 seconds, but since time cannot be negative, we have to dismiss that option

7 0
2 years ago
Which of the following terms correctly describe the object below?
Anuta_ua [19.1K]

Answer:

B,E and F are your answers

4 0
3 years ago
Read 2 more answers
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