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attashe74 [19]
3 years ago
7

Find the surface area of a sphere with a radius of 12 cm. Appropriate pie as 3.14 and round to the nearest hundredth

Mathematics
1 answer:
algol [13]3 years ago
6 0
A=4πr^2

A=4π12^2

12 ^ 2 = 144

4 * 3.14 = 12.56

12.56 * 144 =1808.64

(Google states it 1809.56 though...)
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Quadrilateral KJFG is congruent to quadrilateral K ' J ' F ' G '.
forsale [732]
The correct answer for the question that is being presented above is this one: "A. Quadrilateral KJFG was rotated 90° counterclockwise around the origin and then translated 8 units down." Quadrilateral KJFG is congruent to quadrilateral K ' J ' F ' G '.
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4 years ago
Write the equation of an ellipse with the following characteristics: center =(1,-3) vertices=(-6,-3),(8,-3)
leonid [27]

Answer:

(x-1)²/49 + (y+3)²/16.51 = 1

Step-by-step explanation:

vertex (8,-3)     Foci (6.7,-3)   center (h,k) = (1,-3) , major axis parallel to x axis

a  is the distance of the vertex from the center, and c   is the distance of the foci from the center. b is semi-minor axis

b² = a² - c²         Ellipse equation: (x-h)²/a² + (y-k)²/b² = 1

a = 8-1 = 7         c = 6.7 - 1 = 5.7

b² = 7² - 5.7² = 16.51

Ellipse equation:  (x-1)²/49 + (y- -3)²/16.51 = 1  i.e. (x-1)²/49 + (y+3)²/16.51 = 1

5 0
3 years ago
Read 2 more answers
Please help, will read you with Brainliest. Please check ALL that apply.​
Musya8 [376]

Answer:correct answers are:

A.m<JPX=90°

B.XY & JK form right angles

E. JP=KP

F.XY⊥JK

Step-by-step explanation:

hope this helps

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3 years ago
Please help me with math, it’s easy!! explanation needed!
Olenka [21]

Answer:

  0

Step-by-step explanation:

This equation is in "vertex form," meaning that you can identify the vertex and other features of the graph from the equation.

  y = a(x -h)² +k . . . . . the vertex is (h, k); the vertical scale factor is "a"

Comparing to your equation, you see ...

  a = -1/2, h = 3, k = -1

The vertex is (h, k) = (3, -1). The vertical scale factor is negative.

__

This tells you the graph opens downward (the scale factor is negative), and the vertex (maximum point) is below the x-axis. (It has a negative y-coordinate.)

Because it start below the x-axis and goes down from there, the graph does not intersect the x-axis. There are zero (0) x-intercepts.

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3 years ago
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