course Phy 121
Velocity = 4 + (.9)5Velocity = 4 + 4.5
Velocity = 8.5
The velocity at t = 8 seconds is 8.5 meters/sec
vAve = `ds / `dt
vAve = 4.5 / 5
you don't have units on either of these quantities, but I don't think `ds has a numerical value of 4. `dv would have a numerical value of 4, but `dv is not related to vAve.
vAve = .9 meters/sec/sec
vAve as average velocity. Velocity is not measured in m/s/s, and a correct calculation of velocity will not give you m/s/s.
83 ?4.5 = 78.5
The bee is 78.5 meters from the observer
Please resubmit this with a copy of the problem. I've inserted a couple of notes, so you might want to make a couple of revisions.