a farmer moves along the boundary of a square field of side 10 m in 40 sec what will be the magnitude of displacement of the farmer at the end of 2 minutes 20 sec?

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

answer///scientific method;