Answer:
, 
Step-by-step explanation:
The velocity function of the projectile is obtained by deriving the position function:

Now, the velocities after 3 and 15 seconds are, respectively:




Step-by-step explanation:
the answer as shown in the photo
Step-by-step explanation:
It is given that,
The distance that Scott walks is a function of the time he spends walking. Scott can walk 1 half mile every 8 minutes.
Let y is the distance (in miles) and x is time (in minutes).

The attached graph predicts the shape of the function. Hence, this is the required solution.
Answer:
Range(R)= (5,1,-4,-3)
Step-by-step explanation:
f={ (2,5) , (-6,1) , (0,-4), (4,-3), (7,-3) }
Same range is not repeated.