Look up the ratio and determine how much water is necessary
to completely dissolve 200 grams of potassium chloride at
40°c? (at 40°c a saturated solution of kcl has what ratio of
solvent to solute?

insects!

explanation:

the independent variable, or the one that is intentionally manipulated is the speed.

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