The lifespan of zebras in a particular zoo are normally distributed. The average
zebra lives 20.5 years; the standard deviation is 3.9 years. Estimate the
probability that a zebra lives longer than 32.2 years.

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

I'm confused on this could anyone me and show me what i need to do to solve it.

Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?