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bija089 [108]
3 years ago
6

The radius of the Moon is 1700km, and the radius of the Earth is 6350km. A scale model of the Earth and the Moon is made. In the

model, the radius of the Moon is 3.4cm
(i) Find the radius of the scale model of the Earth
(ii) Find the volume of the scale model of the Earth
Mathematics
1 answer:
IrinaVladis [17]3 years ago
8 0

Answer:

(i) The radius of the scale model of the Earth is 12.7 cm and its volume is 8580.25 cm³ (ii)

Step-by-step explanation:

First you have to find the ratio between the radius of the Moon and the radius of its model (3.4 cm/1700km) and then multiply it for the radius of the Earth model.

Radius of the scale model of the Earth = 6350 km x (3.4 cm/1700 km)

⇒Radius of the scale model of the Earth = 12.7 cm.

Finally, to find the volume of the scale model of the Earth you have to use the formula for the volume of a sphere.

V= 4πr³/3 ⇒ V= 4π(12.7 cm)³/3⇒ V= 8580.25 cm³

 

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Answer:

28 hours

Step-by-step explanation:

Let the number of hours required to:

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If you are scheduled to tutor for 10 hours during the week

x = 10........ Equation 1

You can earn money by tutoring for $8 per hour and by walking dogs for $7.50 per hour. Create and solve an inequality that represents the number of hours you can walk dogs during the week in order to earn at least $290 for the week

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We substitute 10 for x in Equation 2

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fenix001 [56]

Answer:

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Step-by-step explanation:

Given:

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