Using unit rate or proportions, solve. A builder could get 9 sheets of sheetrock for $20. If he bought 15 sheets, how much money would he have spent?
(If needed, round to the nearest hundredth.)

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10

Sketch one cycle if the cosine function y=2cos2theta