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Arte-miy333 [17]
3 years ago
9

The volume of a cylinder is 81 cm3 if the radius is 3 cm what is the height of the cylinder

Mathematics
1 answer:
liq [111]3 years ago
5 0

Answer:

h = 2.86479 cm

General Formulas and Concepts:

<u>Symbols</u>

  • π (pi) ≈ 3.14

<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> </u>

<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</em>

<em>V</em> = 81 cm³

<em>r</em> = 3 cm

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

  1. Substitute in variables [Volume of a Cylinder Formula]:                                81 cm³ = (3.14)(3 cm)²h
  2. Evaluate exponents:                                                                                         81 cm³ = (3.14)(9 cm²)h
  3. Multiply:                                                                                                             81 cm³ = (28.2743 cm²)h
  4. [Division Property of Equality] Divide 28.2743 cm² on both sides:              2.86479 cm = h
  5. Rewrite:                                                                                                             h = 2.86479 cm
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The height is increasing at the rate of (6/5π) ft/min.

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Segment AB has endpoints at A(-7,2) and b(9,-6). Point P lies on AB such that AP:BP=3:1
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The coordinates of the point P which divides the line segment AB made by the points A(-7,2) and B(9,-6) is  (x,y) = (5,-4)

<h3>What is the coordinate of the point which divides a line segment in a specified ratio?</h3>

Suppose that there is a line segment \overline{AB}such that a point P(x,y) lying on that line segment \overline{AB} divides the line segment  \overline{AB} in m:n, then, the coordinates of the point P is given by:

(x,y) = \left( \dfrac{mx_2 + nx_1}{m+n} , \dfrac{my_2 + ny_1}{m+n} \right)

where we have:

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  • and the coordinate of B is (x_2, y_2)

We're given that:

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Let the coordinate of P be (x,y), then we get the values of x and y as:

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Thus, the coordinates of the point P which divides the line segment AB made by the points A(-7,2) and B(9,-6) is  (x,y) = (5,-4)

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Answer:

I would say A

Step-by-step explanation:

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