12. a sound wave is modeled with the equation y = 1/4 cos 2pi/3 θ. a. find the period. explain your method. b. find the amplitude. explain your method.,

A25-inch wide drum is used in a marching band. what area does the top of the drum cover? round to the nearest hundredth. (use 3.14 for pi.)

You are making a blueprint of your bedroom and you plan to use a scale factor of 18 . the actual width of your room is 14 feet and the actual length of your room is 16 feet. determine the width and length of your room on the blueprint. on the blueprint, your room will have a width of feet and a length of feet.

What is the value of f(x) = 2.2 for f(-2)?