The ozone in the stratosphere a. Reflects radio waves b. Reflect solar ultraviolet radiation c. Absorb solar ultraviolet radiation d. Is responsible for the blue color of the sky

b.

explanation:

10.0

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

answerscientific theory;