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mrs_skeptik [129]
3 years ago
9

The volume of a right cylinder is 2,000π cubic feet, and the height is 20 feet. What is the length of the radius in feet?

Mathematics
1 answer:
laila [671]3 years ago
8 0

Answer:

r = 10 ft

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality

<u> Geometry</u>

Volume of a Cylinder Formula: V = πr²h

  • <em>r</em> is radius
  • <em>h</em> is height

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

Volume <em>V</em> = 2000π ft³

Height <em>h</em> = 20 ft

Radius <em>r</em> = unknown

<u>Step 2: Solve for </u><em><u>r</u></em>

  1. Substitute in variables [Volume of a Right Cylinder Formula]:                      2000π ft³ = πr²(20 ft)
  2. [Division Property of Equality] Isolate <em>r</em> term:                                                 100 ft² = r²
  3. Rewrite:                                                                                                             r² = 100 ft²
  4. [Equality Property] Square root both sides:                                                    r = 10 ft
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Answer:

Range = 1.8

Median = 6.3

First Quartile = 6.3

Thrid Quartile = 6.8

Interquartile Range =  0.5

Step-by-step explanation:

First we need to arrange the data set from lowest to highest.

4.9, 5.8, 6.1, 6.2, 6.3, 6.3, 6.4, 6.6, 6.7, 6.7

To find the range of the data set, we simply take the highest value and subtract it to the lowest value.

Range = 6.7 - 4.9

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To find the Median we need to get the middle number of the range. In this case there are two numbers in the middle of the set.

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To get the first quartile, we simply get the median of the lower of the data set.

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The median of the first quartile is 6.1.

To get the third quartile, we get the median of the upper half of the data set.

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To get the interquartile range, we need to subtract the median of the third quartile to the median of the first quartile.

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Answer:

Range = 32

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Thrid Quartile = 19

Interquartile Range =  4

Step-by-step explanation:

First we need to arrange the data set from lowest to highest.

4, 9, 15, 16, 17, 18, 18, 19, 19, 36

To find the range of the data set, we simply take the highest value and subtract it to the lowest value.

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To find the Median we need to get the middle number of the range. In this case there are two numbers in the middle of the set.

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To get the first quartile, we simply get the median of the lower of the data set.

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To get the interquartile range, we need to subtract the median of the third quartile to the median of the first quartile.

Interquartile Range = 19 - 15

Interquartile Range = 4

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