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3 years ago

PLS HELP!! I NEED TO FIND THE SURFACE AREA OF THIS CYLINDER!!!!!

Mathematics

1 answer:

MArishka [77]3 years ago

6 0

Answer:

923.63

Step-by-step explanation:

the formula for the surface area of a cylinder is 2πrh + 2πr^2 ( i just looked it up lol)

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I need with #10, please?

777dan777 [17]

Answer:

h=7ft

Step-by-step explanation:

sinФ=opposite/hypotenuse

sin45°=5/h

0.71=5/h

multiply via by h

0.71h=(5/h)h

h cancel h it remains 5

0.71h=5

divide through by 0.71

0.71h/0.71=5/0.71

h=7.04ft

h=7ft approximately

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The distance D that a spring is stretched by a hanging object varies directly as the weight W of the object. if a 9-kg object st

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Answer:

I think it is b

Step-by-step explanation:

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DerKrebs [107]

I think its B ......

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3 years ago

if 5 litres of water are drawn from a cylindrical container of internal diameter 56cm find the drop in the level of water in the

AlexFokin [52]

Answer:

the drop in the level of water in the container is 2.03 cm

Step-by-step explanation:

The volume of a cylinder can be written as;

$V = \pi r^2h=\frac{\pi d^2h}{4} \\where;\\r = radius \\h = height \\d = diameter$

the change in height when the volume changes can be derived by differentiating the equation.

$dV =\frac{\pi d^2}{4} dh\\dh = dV\frac{4}{\pi d^2}$

substituting the given values;

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$dh = 5000\frac{4}{\pi * 56^2}\\dh = 2.03cm$

the drop in the level of water in the container is 2.03 cm

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3 years ago

If triangle ABC defined by the coordinates A(1, 1), B(9, 1), C(1, 9) is dilated by a scale factor of 1 2 , with resulting vertex

AfilCa [17]

Answer: the answer is b (1, 1)

In this case, the center of dilation is a vertex of the original figure.

The center of dilation is a fixed point in the plane about which all points are expanded or contracted.

Step-by-step explanation:

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3 years ago