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Chapter 4: Q44. (page 174)
Write the prime factorization of the number.
217
Prime factorization of the number 217 is .
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In the future, scientists may want to make a unit of time that is convenient for people living on both Earth and Mars. The new unit of time, called the space-hour, should divide evenly into the number of minutes in each planet鈥檚 day. Under the current Earth definition of minutes, Earth has 1440 minutes per day, and Mars has approximately 1480 minutes per day.
a. Analyze What is the greatest number of minutes that could be in a space- hour?
b. Apply How many space-hours would there be each day on Earth? On Mars?
c. A spacecraft that uses current technology can take 210 days to travel from Earth to Mars. Use a calculator to find how long this trip would be in space-hours.
Tell whether the number is prime or composite.
141
Tell whether the number is prime or composite. If it is composite, write its prime factorization.
175
Write the prime factorization of the number.
202
Algebra Basics Solve the equation. Check your solution.
(Lessons 2.5, 2.6)
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