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:







<em></em>
<em> --- approximated</em>
2/3=14/21 and 5/7=15/21 so 14/21+15/21=29/21 or 1 and 8/21
The change is given by the difference between how much you paid and how much you actually had to pay. For example, if you pay with a $50 bill and you had to pay $13, your change will be
dollars.
In this case, we have

So, Gabriel's mistake was to leave the negative sign to the "-2" at the end of the expression, instead of flipping it to positive "+2" when subtracting it.
The answer is 2.77 • 10^3
Answer:
tag in picture
Step-by-step explanation:
tag in picture so i can see the problem and solve it