<p>does anyone remember the answer to the compound interest problem? I couldn't remember the forumula? I put A. Any chance that's right?</p>
<p>also i couldn't get the law of cosines one. i did it like 10 times and it didn't work. this is the equation i set up let me know what's wrong with it
49=25+81-(2)(25)(81)cosC
i solved for C and got 89 or something.</p>
<p>also is it better to omit a question or guess? i guessed on the five i didn't know.</p>
<p>That's because the formula is this:
c^2= a^2 + b^2 - 2(a)(b)cosC</p>
<p>then your answer would be
49 = 25+81 - 2(5)(9)cosC
90cosC = 57
cosC = 57/90
angle C = 50.7 degrees</p>
<p>wow i'm stupid...i took trig like 2 years ago so i don't remember the forumulas that well</p>
<p>When is the earliest date to find out our scores??</p>
<p>25th. and yes, i got 50.7, which is correct</p>
<p>compound interest was 24 years i believe. sry for dbl post/</p>
<p>October 25th seems incredibly FAR away.</p>
<p>Umm, for the cos(theta) = -cos(theta), wouldn't the answer be no angle? I would agree that it would be quadrants II and III if it were cosx = -cosx (e.g. plugging in -sqrt(2)/2 (which is not an angle)) but the problem had theta so that would mean an angle right? for which case no angle satisfies the equation</p>
<p>I might have gotten None for SOMETHING... I don't remember though. Was that a different problem? I suspect it was...</p>
<p>no, none was for the absolute values thing. there was NO problem where cosx = -cosx. ur thinking of something like -rad 1-sinx^2 = cosx.</p>
<p>it was quads 2 and 3</p>
<p>Yeah, I remember now. It was for the absolute value. Hahaha...</p>
<p>so can we get our scores early?</p>
<p>25th is the date I think</p>
<p>Do we need to rush our scores for ED, if we send them now? Do the colleges even see them if we send them now [before we even know our Math IIC scores]?</p>
<p>yea, colleges will see them</p>
<p>800 =) lol see all this worry over nothingg</p>
<p>haha, same here</p>