
(a)
To find: the circumference of Earth’s orbit assuming that the orbit is a
(a)

Answer to Problem 27PPS
The circumference of the Earth’s orbit is 584336233.6 miles.
Explanation of Solution
Given information:
The radius of Earth’s orbit is 93000000 miles.
Formula Used:
The formula for the circumference of a circle is
Calculation:
Consider the given formula
Now, substitute the radius of Earth’s orbit in the given formula,
Hence, the circumference of the Earth’s orbit is 584336233.6 miles.
(b)
To find: the number of hours it takes Earth to revolve around the sun.
(b)

Answer to Problem 27PPS
The Earth takes to revolve around the sun is 8761 hours.
Explanation of Solution
Given information:
Earth travels at a speed of 66.698 miles per hour around the sun.
Formula Used:
The formula
Calculation:
Consider the given formula
Now, substitute the radius of Earth’s circumference into the equation.
Hence, The Earth takes to revolve around the sun is 8761 hours.
(c)
To prove: that the Earth takes 1 year to go around the sun.
(c)

Explanation of Solution
Given information:
The radius of Earth’s orbit is 93000000 miles.
Calculation:
The number of hours in an orbit divided by the number of hours in a day should will equal the number of days in an orbit.
The number of days in an orbit
Hence, proved.
Chapter 1 Solutions
Algebra 2
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