Answer:
0.9821
Step-by-step explanation:
Probability that a randomly selected value will be less than 2.1 deviations from the mean ; this means the Zscore = 2.1
Hence, using :
P(Z < 2.1) = 0.9821 (standard normal table
= 0.9821
I cant see a list of statements but the graph is a parabola which opens upwards
it factors to (2x + 5)^2 so the root is -2.5 duplicity 2
The vertex of the grapg will just touch the axis at the point (-2.5,0)
