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exis [7]
2 years ago
5

What is the surface area of this right circular cone? radius=12 height=40

Mathematics
1 answer:
Alenkinab [10]2 years ago
4 0

Answer:

2026.75 (units) squared

Step-by-step explanation:

SA of a cone = πr(r+h2+r2)

SA = π(12)(12+√(40^2)+(12^2))

SA = 12π(12+√1744)

Put in calculator and get 2026.75

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Simplify (4.5)(5)(−2).<br><br> 45<br> 4.5<br> −4.5<br> −45
Zina [86]

Answer:

-45

Step-by-step explanation:

(4.5)(5)(-2)=-45

therefore the answer would be the fourth option which is -45

3 0
2 years ago
Sandra can type 180 words in 3 minutes. At this rate, how many words can she type in 5 minutes?
mezya [45]
180 divided by 3 = 60

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5 0
3 years ago
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In a circle with a radius of 3 ft, an arc is intercepted by a central angle of 2π3 radians. What is the length of the arc?
madreJ [45]
The correct question is 
<span>In a circle with a radius of 3 ft, an arc is intercepted by a central angle of 2π/3 radians. What is the length of the arc? 

we know that
in a circle
</span>2π radians -----------------> lenght of (2*π*r)
2π/3 radians--------------> X
X=[(2π/3)*(2π*r)]/[2π]=(2π/3)*r

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the answer is 2π ft




5 0
3 years ago
Read 2 more answers
Please help me get this easy maths question I’m mentally unwell
marshall27 [118]
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8 0
2 years ago
What is the surface area of the cylinder shown below? Use 3.14 for π. A. 660 cm2 B. 863 cm2 C. 353.25 cm2 D. 785 cm2
lesantik [10]

Answer:

602.88cm²

Step-by-step explanation:

Find the image of the cylinder attached

Surface area of a cylinder = A=2πrh+2πr²

r is the radius = 4cm

Height h = 20cm

Substitute

A = 2πr(r+h)

A = 2π(4)(4+20)

A = 8π(24)

A = 192π

A = 192(3.14)

A = 602.88cm²

Hence the surface area of the cylinder is 602.88cm²

5 0
2 years ago
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