(13 points) im super ( look at picture and show all work)) do the last ! (c)

The time to complete one jump is the difference in the values of t for which h(t) = 0. A graphing calculator shows this nicely, but you can also figure it out algebraically.

Since the quadratic has no constant term, it is easily factored.
  0 = -16t^2 + 28t
  0 = -4t(4t -7)
This product will be zero when one or both factors are zero.
For -4t = 0
  t = 0
For (4t -7) = 0
  4t = 7
  t = 7/4 = 1.75

This tells us the dolphin leaves the water at t=0 and completes the jump at t=1.75. The difference between these times is 1.75 - 0 = 1.75 seconds.

The length of time in seconds that it took the dolphin to complete one jump was
  1.75

So I searched for your question and discovered there where more colors to the car! So for the sake of example, I will give my example, and still answer your question! 

Okay, so at the top of the diagram, you start the basics, 2 cars. 

Next, you want to go into detail, the model, Sports, luxury, or standard! 

Then for each model, you have colors! silver, green, blue, and red.
 

To answer your original question, there would be 6 choices/options to choose from.  
 - Because they specifically wanted a red car, and there are 3 models, and 2 car builds.  Multiply 2 and 3, you have 6, or make a diagram. 

To explain and answer my diagram/example, 
there would be 24 choices/options for the family to choose from. 
-Because there are 4 different colors, 3 different model types, and 2 car builds. Multiply 4,3, and 2, and you get 24!  (You can also just count the colors on the diagram!) 

(To answer the model question I found while searching online, the answer would be 30 choices.)