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Rainbow [258]
3 years ago
13

The large rectangle below represents one whole. What percent is represented by the shaded area? (URGENT)

Mathematics
2 answers:
madam [21]3 years ago
7 0

Answer:

40%

[img id="5156800"][/img]

Step-by-step explanation:

Image description: A pie that is split into 5 pieces, similar to the rectangle in the question, except no region is shaded.

1. You see that there are 5 quadrants in the rectangle.

2. You count how many quadrants of the rectangle are shaded in.

3. In the following image there are two shaded quadrants which means 2 out of the 5 quadrants are shaded.

4. In fractions this would equate to 2/5, but this question is asking for percantages.

5. Most of the time percantages are out of 100%, so that is what we'll be basing our answer off of.

6. First we can start with the totoal amount of quadrants, which is 5, and we will divide the 100% by 5, which is 20%.

7. Because there are two shaded areas we would equate each shaded quadrant to 20%, and because there are 2 shaded quadrants we would multiply the number of shaded quadrants by 20%.

8. So we would get 20x2=40

9. By these calculations we would get 40%

10. 40% of the rectangle is shaded.

nikitadnepr [17]3 years ago
4 0

Answer:

40%

Step-by-step explanation:

The whole rectangle is split into 5 parts. Two out of 5 parts are shaded.

Set up a fraction:

\frac{\text{Shaded}}{\text{Whole}}=\frac{2}{5}

Convert into a decimal:

\frac{2}{5}= 0.4

Multiply the decimal by 100 to get the percent:

0.4*100=40

So, forty percent of the rectangle is shaded.

Hope this helps.

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I'm going to assume that the room is a rectangle.

The area of a rectangle is A = lw, where l=length of the rectangle and w=width of the rectangle. 

You're given that the length, l = (x+5)ft and the width, w = (x+4)ft. You're also told that the area, A = 600 sq. ft. Plug these values into the equation for the area of a rectangle and FOIL to multiply the two factors:
A = lw\\
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Now subtract 600 from both sides to get a quadratic equation that's equal to zero. That way you can factor the quadratic to find the roots/solutions of your equation. One of the solutions is the value of x that you would use to find the dimensions of the room:
600 = x^{2} + 9x + 20\\
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Now you know that x could be -29 or 20. For dimensions, the value of x must give you a positive value for length and width. That means x can only be 20. Plugging x=20 into your equations for the length and width, you get:
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Read 2 more answers
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Answer:

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b) Expected value of the purchasing the insurance is -85 $

c) Yes, insurance company can make a profit with this policy.

Step-by-step explanation:

<em>a)</em> The man need to pay 166$ first to enroll the insurance policy. If he survives within a year, he will lose 166$. Otherwise, if he dies within a year he will profit 89834$.

<em>b)</em> Expected value of the purchasing the insurance as following:

<u>-In case of surviving the year: </u>

Value: -166$

Probability: 0,9991

<u>-In case of death in a year </u>

Value: 89834$

Probability: 0,0009

Expected value is E(x) = -166×0,9991 + 89834×0,0009 = -85 $

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Answer:

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Step-by-step explanation:

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95% confidence for \mu_0 will be:

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Thus the right answer is "0.2"

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