12 oz box o rice divided by 1.93 = 16 cents per oz 6 oz box o rice divided by .90 = 15 cents per oz 9 oz box o rice divided by 1.25 = 13 cents per oz. The third option is the most cheapest. Hope this helps!!!
15) factor out cos: cos(x)(sin(x)+1)=0 Now this is true when either cos(x)=0 (x=pi/2 and 3pi/2) Or when sin(x)=-1 (x=3pi/2) So it's solutions are pi/2 and 3pi/2
