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anzhelika [568]
2 years ago
11

Amelia is 5 feet tall and casts a 4-foot shadow. A tree next to her casts a 12-foot shadow. The two triangles formed are similar

because the angle to the sun is the same. Choose two equations that can be used to find the height, h, of the tree.
Mathematics
1 answer:
matrenka [14]2 years ago
7 0

Answer:

The height of the tree is  

18.67

feet

Step-by-step explanation:

Explanation:

The pole and the tree both cast shadows. The triangles which form are similar triangles, because the sun is shining from the same angle in the sky.

You can write this as a direct proportion. (height : shadow)

2 is to 1.5 as what is to 14?

2

1.5

=

x

14

     

←

cross multiply

x

=

2

×

14

1.5

x

=

18.67

feet

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Step-by-step explanation:

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The volume of a cylinder is 252π cm3 and its height is 7. What is the cylinders radius?
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The volume of a cylinder is given by the formula;
Volume = πr²h, where r is the radius, and h is the height or the length 
Therefore,
252 π cm³ = π r² (7)
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3 years ago
Two numbers are in ratio of 2 to3 if the smaller number is 18 the larger number is what
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7 0
3 years ago
Read 2 more answers
A belt runs a pulley of radius 8 inches at 60 revolutions per minute. a) Find the angular speed in radians per minute. b) Find t
Evgesh-ka [11]

Answer:

Part a) 120\pi\ \frac{rad}{min}

Part b) 960\pi\ \frac{in}{min}

Step-by-step explanation:

we have

60 rev/min

Part a) Find the angular speed in radians per minute

we know that

One revolution represent 2π radians (complete circle)

so

1\ rev=2\pi \ rad

To convert rev to rad, multiply by 2π

60\ \frac{rev}{min}=60(2\pi)=120\pi\ \frac{rad}{min}

Part b) Find the linear speed in inches per minute

we know that

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we have

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substitute

C=2\pi(8)

C=16\pi\ in

Remember that

One revolution subtends a length equal to the circumference of the circle

so

1\ rev=16\pi\ in

To convert rev to in, multiply by 16π

60\ \frac{rev}{min}=60(16\pi)=960\pi\ \frac{in}{min}

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Mnenie [13.5K]

Answer:

Hope it helps

Have a good day Ahead

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3 years ago
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