To find: The time when average speed of the wind is 10 miles/hour.
On 25th July the speed of the wind will be 10 miles/hour.
Given data: The average wind speed s (in miles/hour) in the Boston Harbour is approximated by
Method/Concept used:
The maximum value of sine function is 1.
Calculation:
The average wind speed s (in miles/hour) in the Boston Harbour is approximated by
The time for average speed 10 miles/ hour is required.
Substitute 10 for s in the result (1),
Calculating further,
Therefore, from the January 1st after 205 day the average speed of the wind will be 10 miles/hour. The last day or the 205th day will be on 25th July.
Thus. On 25th July the speed of the wind will be 10 miles/hour.
Chapter 10 Solutions
Holt Mcdougal Larson Algebra 2: Student Edition 2012
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