if three Twinkie s cost $1, mow much is it for 15?

the ratio of the actual hight of a person to the length of their shadow is 1:3. at the same rate time, a lighthouse casts a shadow 300 meters long. how tall is the lighthouse?

http://upload.wikimedia.org/wikipedia/commons/0/06/Hostess_twinkies_tweaked.jpg

the ratio of the actual hight of a person to the length of their shadow is 1:3. at the same rate time, a lighthouse casts a shadow 300 meters long. how tall is the lighthouse?

http://upload.wikimedia.org/wikipedia/commons/b/bf/Louisbourg_Lighthouse.jpg

__now its your turn to solve!__
at the copy shop, 18 copies cost $1.18. at that rate, how much will 40 copies cost?