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3 years ago

What is the surface area of a cylinder with base radius 3and height 8

Mathematics

2 answers:

ad-work [718]3 years ago

7 0

Answer:

207.24 or 66pi

Step-by-step explanation:

The combined area of the bases = 2 * 3^2 * pi = 18 pi

The area of the side is 3*2*8*pi = 48 pi

48 pi + 18 pi = 66 pi

66 * 3.14 = 207.24

Gnom [1K]3 years ago

4 0

Answer:

Surface Area = 207.24

Step-by-step explanation:

The formula for SA of a cylinder is 2πr² + 2πrh

Here the equation would be (2 * 3.14 * 9) + (2 * 3.14 * 3 * 8) = 207.24

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7x-2y=16 11x+6y=32.3<br>how to solve this math problem

Aneli [31]

Answer:

Step-by-step explanation:

These types of equations are called simultaneous equations and the method we can use to solve these type of equations is either Substitution, Elimination and Graphing.

We use substitution here because it is easier.

Equation 1

$7x-2y=16$

Equation 2

$11x+6y=32.3$

Lets take equation 1

$7x-2y=16\\7x=16+2y\\x=\frac{16+2y}{7}$

This is our equation 3 , now put it inside equation 2.

$11x+6y=32.3\\11(\frac{16+2y}{7} )+6y=32.3\\\frac{176+22y}{7} +6y=32.3\\\frac{176+22y+42y}{7}=32.3\\176+22y+42y=226.1 \\\\42y+22y=226.1-176\\64y=50.1\\y=\frac{50.1}{64} \\y=0.783\\$

We found the value of y , now to find the value of x insert the value of y in equation 3

$x=\frac{16+2y}{7}\\x=\frac{16+2(0.783)}{7} \\x=\frac{16+1.566}{7}\\x=\frac{17.566}{7}\\x=2.509$

Solved ! See the attached image on both the straight line graphs i have attached for better understanding. Where both the lines intersect each other is our value of (x , y) respectively.

6 0

3 years ago

Estimate show how you estimated 512 divided by 52

Bond [772]

52 = 50

512= 500

500/50 = 10

4 0

3 years ago

Luba_88 [7]

Hey there!

a = 5 ; b = 2

Option A.

a + b

= 5 + 2

= 7

Option B.

a - b

= 5 - 2

= 3

Option C.

2a + 3b

= 2(5) + 3(2)

= 10 + 6

= 16

Option D.

5a - b

= 5(5) - 2

= 25 - 2

= 23

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

5 0

2 years ago

What answer is correct? The audio is just reading the question.

RSB [31]

Answer:

its 7

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

0.5a − 0.3 = 5 (solve for a)

Alla [95]

0.5a - 0.3 = 5

Add 0.3 to both sides:

0.5a = 5.3

Divide both sides by 0.5:

a = 10.6

3 0

3 years ago

Read 2 more answers