I need help with Calculus please!!

Question

anonymous · Answer

Why I can get it right once I plug the formula..?? e^0.016(ln3)/0.049

Thanks!!

experimentx · Answer

why not try plugin x=10 in D(x)

experimentx · Answer

experimentx · Answer

similarly plug x=12 in S(x)

anonymous · Answer

Ok, hold on let try.

anonymous · Answer

I got 2.96 and it is wrong, but I got the units rights. which is 22.42

anonymous · Answer

@Hero please help to solve the last part.. I would like to know what I am doing wrong.
Thanks!

anonymous · Answer

Can you see the last part guys??

anonymous · Answer

attachment

experimentx · Answer

try putting x=22.42 units

anonymous · Answer

I already did it is good but the price per unit its my problem.

anonymous · Answer

@experimentX  check the last attachment, so you can see what I need, Pleasee!!

experimentx · Answer

yeah I'm checking ... isn't 2.16 and 1.21 correct answer?

anonymous · Answer

Ohh Yes!! I realized after, I know how to do that part.

anonymous · Answer

it is only the last part why, when I plug the formula in my calculator I don't get it right.

anonymous · Answer

This one here :: e^0.016(ln3)/0.049

experimentx · Answer

experimentx · Answer

anonymous · Answer

I only have 3 attemp and the right was 1.43, there were similar to the one you gave me.. But I need to have an exact way to do it so..

anonymous · Answer

Should I plug in the whole unit like 22.42 and the formula like you gave me on the web site? and might give me the right answer..

experimentx · Answer