3 years ago

Please helpppppppppppppppp

Mathematics

1 answer:

Zina [86]3 years ago

3 0

Answer:

29520728184915396206153835295

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Find the surface area in terms of pl. 3cm 4 cm A. 12π B. 16.5π C. 4.5π D. 22π

Lera25 [3.4K]

(B) 16.5π

Explanation:

The shape given is a cylinder

The height, h of the cylinder = 4cm

Diameter of the cylinder = 3cm

Radius, r = 1.5 cm

Surface area of cylinder, A = ?

We know:

Surface area of cylinder = 2πrh + 2πr²

$A = 2\pi r (h+r)\\\\A = 2 X \pi X 1.5 ( 4 + 1.5)\\\\A = 16.5\pi$

Therefore, the surface area would be 16.5π

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3 years ago

To the nearest tenth, what is the area of a circle with circumference 35.6 centimeters?

AnnyKZ [126]

The answer is A. 100.9 cm2

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3 years ago

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a silo is shaped like a cylinderwith a cone on top. the radii of the bases of the cylinder and cone are both equal to 8 feet. th

Ymorist [56]

Answer:

5430.85 square feet

Step-by-step explanation:

Height of the cylindrical part of the cilo = 25 feet

radius of the base cylindrical part of cilo = 8 feet

Now volume of cylindrical part of cilo = $\pi r^{2} h$

Volume of cylindrical part of cilo = $\pi(8^{2})25$ = $1600\pi square feet$

Now,

Height of the conical part of cilo = 6 feet

Radius of the conical part of cilo = 8 feet

Volume of the conical part of cilo = $\frac{1}{3}\pi (8^{2})6$ = $128\pi square feet$

Volume of the entire cilo = $1600\pi + 128\pi = 1728\pi$

since $\pi =\frac{22}{7} therefore,$

volume of entire cilo = $\frac{22}{7} (1728)$ = 5430.85

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4 years ago

Solve 3x − 5 ≥ − 8 and 3x − 5 ≤ 1

FromTheMoon [43]

Answer:

10 or 5

Step-by-step explanation:

Its one of those

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3 years ago

Help!! Please I need help on understanding this.

Eva8 [605]

$-4(x -7) + 3(x + 9)=\\
-4x+28+3x+27=\\
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3 years ago