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2 years ago

Find the total surface area of the cylinder Leave the answer in terms of π. radius 3.5 height 6

Mathematics

1 answer:

sesenic [268]2 years ago

3 0

Answer: 133/2π

Step-by-step explanation:

Area of ends:

Area of Circle = πr²

π3.5²=49/4π

There are two ends so you multiply that by 2 to get 49/2π

Area of Rest:

First, you need to find the circumference using the equation: πd

πx7=7π

Then to find the area you just need to multiply 7π by the height

7π x 6 = 42π

Total surface area

You now just need to add them together

49/2π + 42π = 133/2π

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NemiM [27]

Answer:

Step-by-step explanation:

4*1/7

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2 years ago

Determine the lengths of the sides of the rectangle using the given area. Give answers both exactly and

Degger [83]

Answer:

Part a) Exactly values

The width of the rectangle is $\frac{\sqrt{70}}{2}\ cm$

The length of the rectangle is $2\sqrt{70}\ cm$

Part b) Approximately values

The width of the rectangle is $4.2\ cm$

The length of the rectangle is $16.7\ cm$

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The area of rectangle is equal to

$A=LW$

we have

$L=4x\ cm\\W=x\ cm$

substitute the values in the formula

$A=4x(x)$

$A=4x^2$

$A=70\ cm^2$

$70=4x^2$

Solve for x

Divide by 4 both sides

$\frac{70}{4}=x^2$

square root both sides

$x=(+/-)\frac{\sqrt{70}}{2}$

The solution is the positive value

$x=\frac{\sqrt{70}}{2}$

therefore

Exactly values

$L=4\sqrt{70}}{2}=2\sqrt{70}\ cm\\\\W=\frac{\sqrt{70}}{2}\ cm$

Approximately values

$L=4\sqrt{70}}{2}=16.7\ cm\\\\W=\frac{\sqrt{70}}{2}=4.2\ cm$

6 0

3 years ago

Sophie [7]

Answer:

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Step-by-step explanation:

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2 years ago

Read 2 more answers

Any ideas?- geometry chapter 9

Marianna [84]

Answer:

If sin 49° = cos 41°

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2 years ago

3. Find the measure of the angle given.

yuradex [85]

Answer:

Step-by-step explanation:

The sum of the opposite inscribed angles is 180

x+100 = 180

X = 80

7 0

2 years ago