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Vaselesa [24]
3 years ago
5

Find the surface area of the hemisphere 6cm

Mathematics
1 answer:
lina2011 [118]3 years ago
7 0

Answer:

452.4 cm^2

Step-by-step explanation:

a = 4\pi {r}^{2} \\ a = 4 \pi \times (6)^{2}   \\ a = 452.4 \: cm^{2}

I hope that is useful for you :)

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A billboard is 27 feet high and casts a 36-foot shadow at noon. At the same time, a fir tree next to the billboard casts a 48-fo
Archy [21]

Proportion can be used to find the height = 0.75

Step-by-step explanation:

A billboard is 27 feet high and casts a 36-foot shadow at noon.

Height of billboard = 27 feet

Height of shadow of billboard = 36 feet

\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}=\frac{27}{36}\\\\\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}=\frac{3}{4}=0.75

A fir tree next to the billboard casts a 48-foot shadow.

Height of shadow of fir tree  = 48 foot

\texttt{Height of shadow of fir tree, H = }\frac{\texttt{Height of billboard}}{\texttt{Height of shadow of billboard}}\times 48

Proportion can be used to find the height = 0.75

5 0
3 years ago
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Answer:

C.

Step-by-step explanation:

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7 0
3 years ago
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Chance knows the length of a football field (including end zones) is 120 yards. The width of the field is 53.33 yards. What is t
givi [52]

Answer = about 6,400 yards squared

Step-by-step explanation:

4 0
4 years ago
16. What is the area of a triangle that has a base of 8 inches and a height of 3 inches?​
Luden [163]
<h2>Answer:</h2>

A=12in²

Step-by-step explanation:

b Base 8in

hb Height 3in

A=hbb

                                    2=3·8

                                                                                 2=12in²

7 0
3 years ago
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allsm [11]

The answer is: Sphere and Right cylinder.

The explanation for this answer is shown below:

By definition, the numbers of planes of symmetry depends of each solid (a figure of three dimensions). The plane of symmetry divides the solid into two congruent halves which have mirror images.

Based on the information above, a cube has nine plane of symmetry, a square pyramid has four planes of symmetry, the hexagonals prims have thirteen and the spheres a cylinders have infinite number of plane of symmetry.

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3 years ago
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