A compact disc costs $11.95. How much do four of them cost if they are on sale for 10% off the orgiginal price?
PWEASEEEEEEEEE HELP!!!!!!!!!!!!!!!!!!!!!

Question

anonymous · Answer

Its for a friend :)

anonymous · Answer

yeah, yeah-- sure it is ^_^

anonymous · Answer

okay i confess...its for me...
BAHAHAHAHA 
kidding xD

anonymous · Answer

sale price = marked price - discount = 11.95 - 0.1*11.95 = 10.76

so four discs will cost 10.76 * 4 = 43.04

anonymous · Answer

This was the way i was saying it in chat:
$$4(11.95)(.90) = 43.02$$

anonymous · Answer

The .90 is there because when you take 10% off 100%, there is 90% left.

anonymous · Answer

so if they are on a 10% discount, they are 90% of the original, right?
$$11.95 * 0.9 = 10.755 \approx 10.76$$and there are 4 of em, so$$4*10.755 = 43.02$$

But as Harkirat postet - the store would probably calculate it with the rounded 10.76 and thus you'd have to pay 2 cents more... :P