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lyudmila [28]
3 years ago
14

The diameter of a circle is 18 cm what is its area in terms of pi

Mathematics
1 answer:
NikAS [45]3 years ago
3 0

Answer:

A = 81π cm²

Step-by-step explanation:

The formula for area of a circle is A = πr², where r is the radius.  The radius is half the diameter, so our radius for this problem is

18/2 = 9.    So the area is..

A = π(9²) = π(81)

  A = 81π cm²

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upward path of the object begins at 0 ft. Replace v with +15 ft/sec.

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Replace "a" with (-32.2 ft/(sec^2); this is the acceleration due to gravity.


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5 0
3 years ago
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What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y = 27 - x2?
statuscvo [17]
The answer is 54 square units.
let the vertex in quadrant I be (x,y) 
<span>then the vertex in quadratnt II is (-x,y) </span>
<span>base of the rectangle = 2x </span>
<span>height of the rectangle = y </span>
<span>Area = xy </span>
<span>= x(27 - x</span>²<span>) </span>
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<span>d(area)/dx = 3x</span>²<span> - 27 </span><span>= 0 for a maximum of area </span>
<span>3x</span>²<span> = 3 x 3</span>² = <span>27 </span>
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<span>x = ±3 </span>
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3 years ago
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Step-by-step explanation:

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Answer:

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In order to find the number that are solutions to the compound inequalities, you first solve fr x on each inequality.

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Second inequality:

x+1>3\\\\x>2   interval = (2 , ∞)

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The number that are included in the previous interval are:

-6, -3

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The answer to this problem is 84.
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