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ElenaW [278]
3 years ago
12

What is the surface area of the cylinder with height 8 in and radius 2 in? Round your answer to the nearest thousandth.

Mathematics
1 answer:
leonid [27]3 years ago
6 0

Answer:

2^2 = 4

4 x 3.14 = 12.56

12.56 x 2 (since there are two circles on the cylinder) = 25.12

Now let's find the circumference of one circle and multiply it by the height to get the round surface area!

2 x 3.14 x 2 = 12.56(circumference)

12.56 x 8(height) = 100.48

Now add both the surface areas!:

25.12 + 100.48 = 125.6 in2 is your answer.

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Find the equation perpendicular to the line y=−3x+5 that passes through point (2, 6).
ololo11 [35]

Hey there! :)

Perpendicular to y = -3x + 5 ; passes through (2, 6).

Our slope is -3. We know this because it is in the "m" position from slope-intercept form. However, since our equation we're looking for is perpendicular to our given one, we must find the negative reciprocal of -3.

A negative reciprocal is simply a number that is flipped and either given a negative or gets a negative removed.

So the negative reciprocal of -3 is 1/3. This means that our new slope is 1/3.

Now, using point-slope form ( y-y₁=m(x-x₁) ), our new slope (1/3) & (2, 6) , let's find our new equation!

y-y₁=m(x-x₁) y - (6) = 1/3(x - 2)

Simplify.

y - 6 = 1/3x - 2/3

~Hope I helped!~

5 0
4 years ago
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romanna [79]

Answer:

Equation: 3x-20+x=180

4x-20=180

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Step-by-step explanation:

5 0
3 years ago
URGENT - Use 1.7 as the value of 3. What is the area of equilateral triangle ABC? sq mi
Alexxandr [17]
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Is c that the answer
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In the diagram shown at left, three lines intersect to form a triangle.<br> What is the value of x?
Phoenix [80]

Answer:

39°

Step-by-step explanation:

For a straight line, the sum of angle is 180°

At the point where we have the 107°, the inner angle in the triangle will be 180-107=73°

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Since the sum of angles in a triangle are 180°, then angle x will be

X=180-73-68=39°

Therefore, missing angle is 39°

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3 years ago
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