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AURORKA [14]
3 years ago
10

The volume of a cylinder closed at the one end is 1056cm cube. If its height is 21cm, and the radius is 4, find the total surfac

e area
​
Mathematics
1 answer:
monitta3 years ago
3 0

Answer:

578 cm^2

Step-by-step explanation:

The surface area is given by one circle of radius 4 (the other is missing!), plus a "rectangle" (the lateral surface) of sides 21 and 2\pi \times 4 (the length of the circumference at the base). Adding them up we get:\pi \times4^2 + 21\times 2\pi\times4 = 184\pi \approx 578 cm^2

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Answer:

incenter

Step-by-step explanation:

The point of intersection of the three angle bisectors of a triangle is the incenter.

8 0
3 years ago
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What value of x satisfies the equation 5x+1.5=7
Arte-miy333 [17]
First thing we are going to do to solve this is to subtract 1.5 from both sides so:
<span>5x+1.5−1.5</span>=<span>7−1.5
</span>5x<span>=5.5
</span>Next we are going to di<span>vide from both sides by 5 so:
</span><span><span>5x/</span>5</span>=<span>5.5/<span>5
Finally your final answer shall be:
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I hope this helps!</span>
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3 years ago
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podryga [215]
Yo don't need  max height
yo use 'find vertex' equestion


since leading term is negative, this equation has a max

the vertex is the max
in the form
y=ax^2+bx+c
vertex=-b/2a

-4x^2+24x-29
a=-4
b=24

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max height is 3 feet
dunno wat the compete square is

I can do that fo ou though
move -29 off to side and undistriute -4
-4(x^2-6x)-29
complete the square, take 1/2 of -6 an square it andadd 0
-4(x^2-6x+9-9)-29
complete square
-4((x-3)^2-9)-29
move the 9 out by distributing the -9 to the -4
36
-4(x-3)^2+36-29
-4(x-3)^2+7

answer is 3rd option
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3 years ago
Represent 0.8 without an overbar.
Evgen [1.6K]
If x=0.\overline8=0.888..., then 10x=8.\overline8=8.888.... So

10x-x=8.\overline8-0.\overline8
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3 years ago
Vertex B of ΔABC has coordinates (−9, 0). If ΔABC is reflected over the y-axis, what are the coordinates of vertex Bʹ?
irina [24]
9,0 is the coordinate pair

5 0
3 years ago
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