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2 years ago

Identify the surface area of the composite figure in terms of π.

Mathematics

1 answer:

Katena32 [7]2 years ago

7 0

Answer:

78π m²

Step-by-step explanation:

The lateral area of the cylinder is ...

LA = 2πrh

LA = 2π(3 m)(8 m) = 48π m²

The lateral area of one cone is ...

LA = πrh . . . . where h is the slant height

LA = π(3 m)(5 m) = 15π m²

Then the total surface area of the figure is the area of the two cones plus that of the cylinder:

S = 2(cone area) + cylinder area

S = 2(15π m²) +(48π m²)

S = 78π m²

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11. What's the approximate area of a segment of a circle with a height 6 m and the length of the chord is 20 m? round to the nea

JulijaS [17]

Answer:

85.4

Step-by-step explanation:

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2 years ago

(x+x)^2 × -(x×(-1))=4+x-x^2 solve for x, show work.

Anna71 [15]

Answer:

x = 1

x = -5/8 + i* root( 39) / 8

or x = -5/8 - i* root( 39) / 8

Step-by-step explanation:

(x+x)^2 × -(x×(-1))=4+x-x^2

solve for x, show work.

(x+x)^2 × -(x×(-1)) = 4+x-x^2

Simplify:

(2x)^2 * (-(-x)) = 4 + x - x^2

4x*x * (-(-x)) = 4 + x - x*x

4*x*x*x = 4 + x - x*x

4*x*x*x - 4 = x *(1 - x)

4* (xxx - 1) = x * (1- x)

4* (x - 1)*( x*x +x + 1) = x (1 - x)

4( xx + x + 1) = -x

x = 1 is a solution.

4xx + 4x + 4 = -x

4xx + 5x + 4 = 0

x = -5/8 + root(25 - 4*4*4) / 2*4

x = -5/8 + i* root( 39) / 8

or x = -5/8 - i* root( 39) / 8

also x = 1

6 0

3 years ago

(x+2)(x-18)=0 FIND THE SOLUTIONS OF THE EQUATION

vladimir2022 [97]

Either one at any given time could be equal to zero. So
x + 2 = 0
x = - 2

x - 18 = 0
x = 18

I've enclosed a graph of this so you can see that the answers I've given are the ones expected.