1800:60=30 revolutions per second
30*2π=60π radians per second
When comparing to thing with same rate, set up a proportion:
Inches/cost
13/.78=33/x
(13)(x)=(.78)(33) [cross multiplied]
13x=25.74 [simplified]
13/13x=25.74/13 [division property]
x=1.98
33 inches of wire will cost $1.98.
he payed 58 dollars to rent a bike for two hours because 40+9=49 & 49+9=58