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Natalija [7]
3 years ago
15

The surface area of a cylinder

Mathematics
1 answer:
Kruka [31]3 years ago
8 0
What are you asking, exactly? 

To find the surface area of a cylinder, the formula is: 
2\pirh + 2\pir^{2}

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Find the circumference and area of a circle with a diameter of 10 inches.
alekssr [168]

\text{First, lets find the circumference of a circle}\\\\\text{The equation to find this is:}\,\,c=2\pi(r)\,\,or\,\,c=\pi(d)\\\\\text{Lets use the second equation, plug in and solve:}\\\\c=\pi(10)\\\\c=31.4159265359\\\\\text{Round to the nearest hundredths}\\\\\boxed{\text{Circumference = 31.42 in}}\\\\\text{Area:}\\\\\text{The equation to find the area is:}\,\,a=\pi(r)^2\\\\\text{Half of 10 is 5, so that's our radius}\\\\\text{Plug in and solve:}\\\\a=\pi(5)^2\\\\a=\pi(25)\\\\

a= 78.5398163397\\\\\text{Round to the nearest hundredths}\\\\\boxed{\text{Area: 78.54 in}^2}

6 0
3 years ago
Read 2 more answers
You have 65% of your homework left to complete. What decimal and fraction represent the amount of homework you have finished?
Maurinko [17]
Percentage of homework that is left to be completed = 65%
Then
The percentage of homework that is already done = (100 - 65) percent
                                                                           = 35 percent
                                                                           = (35/100)
                                                                           = 7/20
                                                                           = 0.35
So the amount of homework that has already been completed can be represented as 7/20 or o.35. Hope this is the answer you were looking for and i have helped you in this matter. Also i hope the procedure is easy enough for you to understand.
7 0
4 years ago
How do you solve the question solve for n 1/3 n = 6
timofeeve [1]

Answer:

n = 18 \\

Step-by-step explanation:

\frac{1}{3} n = 6 \\ n = 6 \div  \frac{1}{3}  \\ n = 6 \times 3 \\ n = 18 \\

7 0
2 years ago
5 Wyatt had one sack that contained some
defon

Answer:

Step-by-step explanation:

the answer is 1/4

7 0
3 years ago
Section 5.2 Problem 17:
Elina [12.6K]

This DE has characteristic equation

4r^2 - 12r + 9r = (2r - 3)^2 = 0

with a repeated root at r = 3/2. Then the characteristic solution is

y_c = C_1 e^{\frac32 x} + C_2 x e^{\frac32 x}

which has derivative

{y_c}' = \dfrac{3C_1}2 e^{\frac32 x} + \dfrac{3C_2}2 x e^{\frac32x} + C_2 e^{\frac32 x}

Use the given initial conditions to solve for the constants:

y(0) = 3 \implies 3 = C_1

y'(0) = \dfrac52 \implies \dfrac52 = \dfrac{3C_1}2 + C_2 \implies C_2 = -2

and so the particular solution to the IVP is

\boxed{y(x) = 3 e^{\frac32 x} - 2 x e^{\frac32 x}}

8 0
2 years ago
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