3. The rotor blades of a helicopter are 16 ft long and are rotating at 120 rpm. (a) Find the angular speed of the rotor. (b) Find the linear speed of a point on the tip of a blade.

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

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