A 1.0 kg red ball moving at 5.0 m/s [East 30 degrees North] collides head-on with a blue ball of mass 4.0 kg in an inelastic collision. The blue ball was initially moving at 3.5 m/s [West 40 degrees North]. What is the final velocitity of: (a) the red and blue ball?

(b) the blue ball?

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form