Sounds are how we perceive pressure waves in the air. the note f-sharp, more than 3 octaves above the note 'middle c', is a sound wave with an ordinary frequency* f=3960 hertz or cycles/sec. model this note with the sine function, assuming that the amplitude is 1 and the phase shift is 0.

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

What is the volume of a rectangular prism that is 120 centimeters by 2 meters by 1.5 meters in cubic meters?