6. A guy drives his car 20. km East towards the highway, It takes him a total of 1.5 hours. What was his average velocity?*
Please help!!

Why are some galaxies’ spectra blueshifted rather than redshifted? question 4 options:

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?