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MatroZZZ [7]
3 years ago
15

An umbrella you bought is shaped like a regular octagonal pyramid with a side length of four feet and a slant height of feet. Es

timate the amount of fabric that the umbrella has.

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
8 0
The complete question in the attached figure

we know that
[<span>amount of fabric]=8*[area of lateral triangle side]
area of lateral triangle side=(1/2)*4*5----> 10 ft</span>²
so
[amount of fabric]=8*[10]----> 80 ft²

the answer is
80 ft²

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The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.35°F and a standard deviati
DochEvi [55]

Answer:

a) 99.97%

b) 65%

Step-by-step explanation:

• 68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

• 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ.

• 99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ.

Mean of 98.35°F and a standard deviation of 0.64°F.

a. What is the approximate percentage of healthy adults with body temperatures within 3 standard deviations of the mean, or between 96.43°F and 100.27°F?

μ - 3σ

98.35 - 3(0.64)

= 96.43°F

μ + 3σ.

98.35 + 3(0.64)

= 100.27°F

The approximate percentage of healthy adults with body temperatures is 99.97%

b. What is the approximate percentage of healthy adults with body temperatures between 97 .71°F and 98.99°F?

within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

μ - σ

98.35 - (0.64)

= 97.71°F

μ + σ.

98.35 + (0.64)

= 98.99°F

Therefore, the approximate percentage of healthy adults with body temperatures between 97.71°F and 98.99°F is 65%

4 0
3 years ago
Please<br> Help fast I have 25 mins left
castortr0y [4]

Answer:

Step-by-step explanation:

sales earning commission=130,000-21000=109,000

sales commission=5800-900=4900

rate of commission=4900/109,000 ×100=490/109 %

≈4.495

≈4.50%

4 0
3 years ago
Which of the following would be 1,000 times a base unit?
Zolol [24]
Kilo :) hope this helps


5 0
3 years ago
A retangle is 12 feet wide and 96 inches long. What is the area of the rectangle
luda_lava [24]

I think the area of the rectangle is 96

8 0
3 years ago
If the discriminant of a quadratic equation is positive, which of the following is true of the equation?
Yanka [14]
For this case suppose that we have a quadratic equation of the form:
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 x =  \frac{-b +/-  \sqrt{b^2 - 4ac}}{2a}
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 b ^ 2 - 4ac&#10;
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B. it has two real solutions
3 0
3 years ago
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