Aprobability density function is given by:

2 2 2 for 0

( )

0 otherwise,

h v av e v

f v

    



find:

(a) the expectation, [6]

(b) the variance

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.