The shorter the the wavelength the blank frequency

the shorter the wavelength, the bigger then they frequency

Explanation:

the shorter the wavelength,the bigger the frequency

Frequency is inversely proportional to wavelength

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

answeralert drivers who drift off the road;