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ale4655 [162]
3 years ago
9

SOMEONE PLEASE HELP. SHOW WORK

Mathematics
1 answer:
kirill [66]3 years ago
8 0
You need to break this into smaller shapes. This shape consists of 4 smaller shapes: 3 triangles and 1 rectangle.

Formulas:
Triangle: A = 1/2 bh
Rectangle: A= bh

Let's start with the triangle on top with the points B, C and D. 
Base = 6
Height = 3

A = 1/2 (6)(3)        
Multiply base by height
A = 1/2 (18)
Multiply.
A= 9

The triangle on the left:
Base= 4
Height = 4

A= 1/2 (4)(4)
A= 1/2 (16)
A= 8

The triangle on the right:
Base= 2
Height= 4

A= 1/2 (2)(4)
A= 1/2 (8)
A= 4

The rectangle in the middle:
Base= 6
Height=4

A= (6)(4)
A= 24

Now add all the areas together:
9 + 8 + 4 + 24 = 45 cm²

Hope this helps! :)

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Step-by-step explanation:

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3 years ago
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viktelen [127]

Answer:

SA ≈ 1134 cm²

General Formulas and Concepts:

<u>Math</u>

  • Pi π = 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

<u>Geometry</u>

  • Radius: r = d/2
  • Surface Area of a Sphere: SA = 4πr²

Step-by-step explanation:

<u>Step 1: Define</u>

d = 19 cm

<u>Step 2: Find </u><em><u>SA</u></em>

  1. Substitute [R]:                    r = 19 cm/2
  2. Divide:                                r = 9.5 cm
  3. Substitute [SAS]:               SA = 4π(9.5 cm)²
  4. Exponents:                        SA = 4π(90.25 cm²)
  5. Multiply:                             SA = 361π cm²
  6. Multiply:                             SA = 1134.11 cm²
  7. Round:                               SA ≈ 1134 cm²
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3 years ago
Question 2 (6 points)
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Answer:

here

Step-by-step explanation:

it is basically a sector , use the area formula i.e.  

[(theta)/360]*πr^2

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The sign of the product would be the postitive sign because all three integers have the same sign.
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