A random variable X has continuous distribution with density fX(x) = 1 2 e −|x| for x ∈ (−[infinity], [infinity]). 10 (a) Find the moment generating function MX(t) = E[e tx]. Make sure to indicate for which t ∈ R the MGF is well-defined.

step-by-step explanation:

6 on both sides and twelve on the top and the bottom

step-by-step explanation:

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500