PLEASE HELP An object moves in simple harmonic motion with period 7 seconds and amplitude 5cm. At time t= 0 seconds, its displacement d from rest is 0 cm, and initially it moves in a positive direction. Give the equation modeling the displacement d as a function of time t.

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need

The equatorial radius of earth is approximately 6 × 10^3 km, while the equatorial radius of saturn is approximately 6 × 10^4 km. which of the following is true? a. the equatorial radius of saturn is approximately one hundred times that of earth. b. the equatorial radius of saturn is approximately ten times that of earth. c. the equatorial radius of earth is approximately one hundred times that of saturn. d. the equatorial radius of earth is approximately ten times that of saturn.

Find four solutions of the given function. write the solutions as ordered pairs. 4x – y = 4