calculus

Pre-College Issues High School Life
1

<p>Stupid question:</p>

<p>I get paranoid about these things, so just forgive me.</p>

<p>If the answer to a problem is 9.145 and I get 9.125 is that okay?</p>

2

<p>no
10char.</p>

3

<p>nope 10char</p>

4

<p>are you kidding me? O.O Its an estimate</p>

5

<p>Estimates have to be to the nearest thousandths. Your .020 away meaning something in your calculations is incorrect.</p>

6

<p>It depends on what you did wrong.</p>

<p>It could likely just be accumulation of round off error, in which case it doesn’t really matter.</p>

7

<p>Umm I was trying my first area under a curve problem.</p>

<p>I just don’t see how I can be EXACT with rectangles under a curve, I thought it was close enough but I have to make sure.</p>

8

<p>If you did a Riemann sum or even an exact integral there may have been some rounding error but usually you should get the exact answer.</p>

9

<p>

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<p>um, are you manually making the rectangles? Or are you using values from a function?</p>

10

<p>No I’m not using integrals yet, I just started Calculus so the book just gave me a graph with rectangles to read off of.</p>

11

<p>It might be the book, not you.</p>

<p>If you go on AP Central and look at some of the scoring guidelines, you’ll see that an answer is acceptable only if it is different within one sigfig. e.g. - 9.125 is acceptable if the real answer is 9.124 or 9.126</p>

12

<p>I think he is manually trying to calculate the are under a curve by drawing various rectangles to get an estimate without any integration. This is usually seen in the first couple of chapters of some calculus books I guess. If this is a case, then I don’t think your answer should be much of a problem given that this is not tested on the AP exam.</p>

<p>Edit: Secret Asian Man already said it, didn’t know it was called a Riemann sum</p>