Answer:
Step-by-step explanation:
Twelve
You are correct, but I have a small comment.
As far as I can see, you have both 12 and 13 correct. The short way to do 12 is just to divide 72 into 360
360 / 72 = 5
The more general formula is 360 / central angle = # of sides.
What the question means is that if your start with a polygon (it is a regular polygon by the way), and rotate it around its center, how many sides does it have in order that when you go through 72 degrees, the figure looks like it did when you started.
If the polygon is completely unmarked, then the idea is that it will look like you haven't done anything to the polygon even though you have rotated it 72 degrees.
The way you did 13 is exactly how it should be done.
4 prints
12x = 2.5x + 38
at 4, these expressions are equal
The inverse dependency ratio is an indicator that gives insight into the amount of people of nonworking age compared to the number of those of working age. It is defined as the ratio between <span>the number of </span>dependents, (aged zero to 14 and over the age of 65,) and the number of the total population, aged 15 to 64.
A high ratio means those of working age, and the overall economy, face a greater burden in supporting the aging population. <span>
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Answer:
the decimal expansion of 7/8 is
0.875
Answer:
11 3/7 hours
Step-by-step explanation:
The shorter candle burns faster, so the candles will not be the same height (0) until the taller candle burns completely. At 0.7 in/h, that will take ...
(8 in)/(0.7 in/h) = 80/7 h = 11 3/7 h
