Answer:
9.3 hours
Step-by-step explanation:
Given

Required
Hours of sunlight on Feb 21, 2013
First, calculate the number of days from Jan 1, 2013 to Feb 21, 2013

So:

So, we have:







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<em> --- approximated</em>
Answer:
198 / 9 = 22
Step-by-step explanation:
Probably you are supposed to compute

Factorize the numerator and denominator, then simplify:
-4.5,-5.5
Step-by-step explanation:
-8-1/2 , -8-3/2
=-4.5 , -5.5 (midpoint)