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ira [324]
3 years ago
10

Find the height of a cylinder with radius 13 and surface area 1470.3.

Mathematics
2 answers:
g100num [7]3 years ago
8 0
First you need the formula for SA of a cylinder: SA = 2(πr^2) + 2πr*h
(area of the top and bottom circles plus the side)
Then plug your values into the equation and rearrange to make h the subject:
1470.3 = 2π13^2 + 2π*13*h
26πh = 1470.3 - 338π
h = (1470.3 - 338π)/26π
   =5.00042...
so h is approximately 5 units :)
mixas84 [53]3 years ago
6 0

Answer:

The answer is 5.

Step-by-step explanation:

I did the quiz and it came up as correct.

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Angles X and Y are supplementary. Angle X is 3 times the measure of angle Y. What is the measure of angle X?
never [62]

Answer:

∠ Y = 45°, ∠ X = 135°

Step-by-step explanation:

Since the 2 angles are supplementary, then

X + Y = 180 ← substitute X = 3Y

3Y + Y = 180, that is

4Y = 180 ( divide both sides by 4 )

Y = 45

and

X + Y = 180, so

X + 45 = 180 ( subtract 45 from both sides )

X = 135

Thus

∠ X = 135° and ∠ Y = 45°

5 0
3 years ago
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The scale drawing of a concrete pad has a length of 9.1 cm, a depth of 2.2 cm and a width of 3.8 cm.
butalik [34]
242 cm because 418/ 3.8 = 110, 110 x 2.2 = 242 cm 
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3 years ago
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Write the expression (x^4)^3 in simplest form.
Alexxandr [17]

Answer:

x\sqrt{3}

Step-by-step explanation:

4*3

6 0
3 years ago
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a comedy show sells lower level tickets for $78 and upper level tickets for $59. on the opening knight 2368 tickets were sold fo
shusha [124]
Let L represent lower level tickets and U upper level.

Starter equations:
L + U = 2368
78L + 59U = 157800

Solve simultaneous equations:
59L + 59U = 139712
so 19L = 18088
L = 952
U = 2368 - 952 = 1416

952 lower level tickets and 1416 upper level tickets were sold.
3 0
3 years ago
I need help what’s the answer ?
pogonyaev

Answer:

x = 30

Step-by-step explanation:

Using the sine ratio in the right triangle

sinx = \frac{opposite}{hypotenuse} = \frac{2.5}{5} = \frac{1}{2} , then

x = sin^{-1} (\frac{1}{2} ) = 30

4 0
3 years ago
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