The equation below describes a parabola. If a is negative, which way does the
parabola open?
y= axa

A.) Right
B.) Up
C.) Left
D.) Down

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.