A random number generator picks a number from one to nine in a uniform manner.

a. Graph the probability distribution.

b. f(x) = _________

c. μ = _________

d. σ = _________

e. P(3.5 < x < 7.25) = _________

f. P(x > 5.67)

g. P(x > 5 | x > 3) = _________ Carbon-14 is a radioactive element with a half-life of about 5,730 years. Carbon-14 is said to decay exponentially. The decay rate is 0.000121. We start with one gram of carbon-14.
We are interested in the time (years) it takes to decay carbon-14.