ALGEBRA 2, 2012
27

 PAGE: 8 SET: Exercises PROBLEM: 27

The radius of Earths orbit is .

a.

Find the circumference of Earths orbit assuming that the orbit is a circle.

The formula for the circumference of a circle is .

(Formula)

(Substitute)

(Multiply)

Therefore, the circumference of the earth is .

b.

Earth travels at a speed of around the Sun.

The formula , where is time in hours, is circumference and is velocity.

Find the number of hours it takes Earth to revolve around the Sun.

(Substitute and )

(Simplify)

Therefore, the number of hours it takes Earth to revolve around the Sun is .

c.

It takes year for Earth to go around the Sun.

.

Yes;.

a.The circumference of the earth is .

b.The number of hours it takes Earth to revolve around the Sun is .

c.Yes; .

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