Suppose that a r. v. has a probability density function )=x^2/3 if −1≤x≤2 (a) check that it is a valid probability density function (b) find the distribution function of (c) find the moment generating function of (d) using it check that / |=0)=

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50

y=1/4x-4

step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

the answer is y = 11.54

hope this : )