Answer:
D
Step-by-step explanation:
I just did it and got it right
Answer:
A is not a function
Step-by-step explanation:
In table A, the x value of 4 goes to two different y values
To be a function each x value can only go to one y value
A is not a function
Answer:

Step-by-step explanation:


![E[x] = \sum{p_i*x_i}](https://tex.z-dn.net/?f=E%5Bx%5D%20%3D%20%5Csum%7Bp_i%2Ax_i%7D)
=0.4(-25000)+0.25*0+0.35(40000)
=-10000+0+14000
=+4000
C, 450 cubics yds because 20 x 5 x 9 equals 900. 900 divided by two (half) is 450