The tuning fork is a device used to verify the standard pitch of musical instruments. The international standard pitch has been set at a frequency of 440 cycles/second.
Write a rule in the form f(t) = A sin Bt that expresses this oscillation where t represents the number of seconds.

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost

Solve for x. −3/4(x+2)=6 enter your answer in the box

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?