For a standard normal distribution, which of the following expressions must always
O P{ZS-a)- P(-aszsa)-P(zza
Pézs-a)- P(-aszsa)+P(z2 a)
P(z<-a)+Pl-a P(ZS-a)+P(-aszsa)+P(z?a)

What could explain what happened when the time was equal to 120 minutes

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

What is the distance between point a and b