Sound waves can't travel through
a. an elastic material.
b. a liquid.
c. a solid.
d. a vacuum.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Write a polynomial function with the given zeros x= -1,0,2show your work

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?