READ: p. 45-52
DO: p. 47 #1-6 (Show all work!) p. 59 #5
btw a lot of points lol

its a 5.5 n

glad that

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

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.