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melisa1 [442]
3 years ago
11

What is the surface area of a right cylinder which has a base with radius 9 units and has a height of 12 units?

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
8 0

Answer:

1187.52

Step-by-step explanation:

A=2πrh+2πr2=2·π·9·12+2·π·92≈1187.52202

Evgesh-ka [11]3 years ago
6 0

Answer:

1187.997

Step-by-step explanation:

surface area =2πrh+2πr^2

(2•22/7•9•12)+(2•22/7•9^2)

44/7(108)+44/7(81)

6.285(108)+6.285(81)

678.857+509.14

1187.997

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H(x)= 9/x( x^2-49)<br> Determine the domain of the function
Norma-Jean [14]

Answer: The domain of the function h(x) = \frac{9}{x(x^2-49)} is:

Interval Notation: (-∞ , -7) ∪ (-7 , 0) ∪ (0 , 7) ∪ (7, ∞)

Set-Builder Notation: { x | x ≠ 0 , 7 , -7 }

All real numbers besides 0, 7, and -7.

Step-by-step explanation:

In order to find the domain of your rational function, we need to simplify it:

h(x) = \frac{9}{x(x^2-49)} = \frac{9}{(x)(x+7)(x-7)}

Remember, most of the time, the domain of a rational function consists of all real numbers besides zero.

To find the domain, we equal the equations in the denominator to zero.

x=0

x+7=0 --> x=-7

x-7=0 --> x=7

So all real numbers except for 0, -7, and 7 are in the domain of this rational function.

8 0
3 years ago
Fractorise the following (a-b)²+(a-b)​
Lisa [10]

Step-by-step explanation:

taking common (a-b)

so we get the answer

5 0
3 years ago
Mitra created a mosaic design using square 2x2 cm white tiles and 2x3 cm rectangular centimeter black tiles. She used twice as m
zvonat [6]

Mitra used 156 white tiles of 2x2 cm and 76 black tiles of 2x3 cm to form a pattern with an area of 1092 cm²

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Let x represent the number of white tiles and y represent the number of black tiles.

Area of white tiles = 2 cm * 2 cm = 4 cm²

Area of black tiles = 2 cm * 3 cm = 6 cm²

She used twice as many white tiles as black tiles. Hence:

x = 2y   (1)

Also, the finished pattern was 1092 square centimeters in area. Hence:

4x + 6y = 1092   (2)

From both equations:

x = 156, y = 78

Mitra used 156 white tiles of 2x2 cm and 76 black tiles of 2x3 cm to form a pattern with an area of 1092 cm²

Find out more on equation at: brainly.com/question/2972832

#SPJ1

3 0
2 years ago
Which value from the set (54,45,27,6) makes 54/x = 9 true?
OLga [1]

Answer:

x = 6

Step-by-step explanation:

54/6 is 9. This is the only correct one.

Hope it helps!

3 0
3 years ago
What is the volume of the triangular prism below 7.8 in 6 in 5 in 11.5 in
Zarrin [17]

Answer:

D. 172.5 inches cubed

Step-by-step explanation:

Have a good day :)

8 0
2 years ago
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