Over which interval(s) is the function decreasing?
<u>Answer:</u>
The answer is B --> 
<u>How I got that:</u>
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These are really easy, you're simply looking for numbers that you can factor down. Like here:
I took:

and saw that I could factor out 4 from the denominator:

and then I canceled out the common factor (4 because its on both sides):

And there ya go!
<em>~That's All Folks~</em>
<em>-Siascon</em>
If over you mean division then it would be 2556 divided by 5000 and that would equal 0.5112 and if you meant it to be addition because sum means the answer of an addition problem then it would be 7556 because of 2556 plus 5000, but i dont know if that is what you meant by your question. if you explain the lesson to me that you are learning, then i might be of more help to you in solving your problem.
140 should be your answer. 490 divided by 3.5 = 140 :)
Analysis:{because the number of rulers is exactly three scales}
so a scale represents a number of
(24÷3=8)
missing information in the space around the chart 40,32,24,16,8.