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Agata [3.3K]
3 years ago
10

The total surface area of a right circular cylinder is 84 pie cm square and the altitude is 11 cm .find the radius of the base​

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

Answer:

use the formula r = square root of (V / (pi x h))

BartSMP [9]3 years ago
7 0

Answer:

r = 3cm

Step-by-step explanation:

Use the formula for the surface area of a cylinder and solve to obtain r=3cm

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Use a half-angle identity to find the exact value of sinPi/8
stellarik [79]

Answer:

  sin(π/8) = (1/2)√(2-√2)

Step-by-step explanation:

Using the half-angle formula ...

  \sin{\dfrac{\theta}{2}}=\sqrt{\dfrac{1-\cos{\theta}}{2}}

We can let θ = π/4 and simplify the result as follows:

  \sin{\dfrac{\pi}{8}}=\sqrt{\dfrac{1-\cos{(\pi/4)}}{2}}=\sqrt{\dfrac{1-\dfrac{\sqrt{2}}{2}}{2}}=\sqrt{\dfrac{2-\sqrt{2}}{4}}\\\\=\boxed{\dfrac{1}{2}\sqrt{2-\sqrt{2}}}}

5 0
3 years ago
Read 2 more answers
1. Solve -y/12 = 6<br> 2. Solve x/4 = 8
OlgaM077 [116]

1. Isolate the y. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

First, multiply 12 to both sides

-y/12(12) = 6(12)

-y = 6(12)

-y = 72

Isolate the y. Divide -1 from both sides

-y/-1 = 72/-1

y = -72

-72 is your answer for y

--------------------------------------------------------------------------------------------------------------

2. Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

x/4 = 8

First, multiply 4 to both sides

x/4(4) = 8(4)

x = 8(4)

x = 32

32 is your answer for x

--------------------------------------------------------------------------------------------------------------

hope this helps

4 0
3 years ago
I WILL MARK BRAINIEST
Daniel [21]

Answer:

C) the triangles are congruent

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Another Assignment im missing so can anyone help this is my last math assignment?
stiks02 [169]

Answer:

30. $<u>25.42</u>

31.  $<u>21.48 </u>

32. $<u>23.06</u>

Step-by-step explanation:

30.  8.54+7.50+9.38 = 25.42

31.  6.99+5.99+8.50 = 21.48

32.   8.50+5.33+9.23 = 23.06

8 0
3 years ago
Can someone plz help!!!! :(
Hunter-Best [27]

Answer:

60 degress

Step-by-step explanation:

How I got it:

1. Find out the angel of each side. 360 divded by 6 = 60

2. Get the answer of 60

Advice:

-Make an polygon using paper and rotate it. (Use protractor and ruler if your gonna do it)

6 0
3 years ago
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