The standard normal curve shown here is a probability density curve for a continuous random variable. this means that the area underneath the entire curve is 1. what is the area of the shaded region between the two z-scores indicated in the diagram?
a.0.6844
b.0.6958
c.0.1131
d.0.1151
e.0.6864

What is the value of r of the geometric series?

Im literally having a mental breakdown

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)