
(a)
To calculate: To find how many degrees would Miguel need to use for the central angle on his
(a)

Answer to Problem 7.8.2EP
Central angle for Study sector is
Explanation of Solution
Given information: Given that Miguel studied for
Formula Used:
Portion is circle graph is calculated
Calculation:
Given that Miguel studied for
Total hours in week
Central angle on circle graph for Study sector is calculated as
Conclusion:
Hence, central angle is
(b)
To calculate: To find how many hours did Gabriel spend practicing the piano during the week and round to the nearest hundredth
(b)

Answer to Problem 7.8.2EP
Hours spent byGabriel in practicing the piano is
Explanation of Solution
Given information: Gabriel used
Formula Used:
Portion is circle graph is calculated
Calculation:
Given that Gabriel used
Total central angle
Central angle on circle graph for Study sector is calculated as
Here
Substituting the values,
Conclusion:
Hence, hours spend in practicing piano is
Chapter SH Solutions
Pre-Algebra, Student Edition
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A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
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