why the answer to the following is 330? C(2012) = 103 + 15(2012 - 1990 [22]) = 330

kiltroniix

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I'm trying to wrap my mind around why the answer to the following is 330. It's been a long time but I don't understand how the answer arrived at is 330. Any help?

[FONT=&quot]C(2012) = 103 + 15(2012 - 1990 [22]) = 330[/FONT]
 
The short answer is it's not. Pretty much nothing about this problem makes any sense. As written, you would evaluate everything according to PEMDAS and get:

\(\displaystyle C(2012) = 103 + 15(2012 - 1990 [22]) = 103 + 15(2012 - 43780)\)

\(\displaystyle = 103 + 15(-41768) = 103 - 626520 = -626417\)

This is very clearly not 330. Whoever wrote this exercise needs to seriously learn how to format math as text. There's absolutely no excuse for this awful notation and formatting. The number 22 in brackets here appears to indicate that the answer to the subtraction is 22, which is correct. Then the equals symbol outside would indicate that the result of 15 * 22 = 330, which is also correct. Thus, the actual answer for C(2012) would be 103 + 330 = 433.

But, just, nothing about this is okay! Please consider having a serious sit-down with whoever gave you this problem and make sure they know this is unacceptable. If it came this way in a textbook, I'd look up contact information for the writers and/or publishers and tell them the same. Also consider asking your instructors to shy away from using that textbook.
 
Last edited:
I'm trying to wrap my mind around why the answer to the following is 330. It's been a long time but I don't understand how the answer arrived at is 330. Any help?

C(2012) = 103 + 15(2012 - 1990 [22]) = 330
I'm going to guess that you're evaluating a function of some sort. What, exactly, is that function?

Thank you! ;)
 
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