
Concept explainers
a.
To find: on what days will Hartford have exactly
a.

Answer to Problem 21CYU
October 20th, February 19th.
Explanation of Solution
Given information: The number of hours of daylight d in Hartford, Connecticut, may be
approximated by the equation
Calculation:
March 21st+213 days= October 20th
March 21st+335 days= February 19th
The dates when there will be
hours of daylight will be: October 20th, February 19th.
b.
To find: what days of the year have at least
b.

Answer to Problem 21CYU
The longest day of the year occurs around June 22nd, so the days between February 19th and October 20th must increase in length until June 22nd and then decrease in length until October 20th.
Explanation of Solution
Given information: The number of hours of daylight d in Hartford, Connecticut, may be
approximated by the equation
Calculation:
Have to solve the inequality:
From the part (a)
March 21st+213 days= October 20th
March 21st+335 days= February 19th
The dates when there will be
hours of daylight will be: October 20th, February 19th
This means must have:
The longest day of the year occurs around June 22nd, so the days between February 19th and October 20th must increase in length until June 22nd and then decrease in length until October 20th.
Chapter 14 Solutions
Algebra 2
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