Absolute value is alwas positive
so all of them excet the 3rd one are false
|w|=0 has 1 solution
if the last one was |w|=1 then ther would be 2 solutions, -1 and 1
answer is |w|=0
0.3*0.6 = 0.18. By definition of independent.
X=-.5, it’s less than 0, and concave up & increasing in this situation are the same.
I am not sure but I think it is 16.5