Answer:
14) F
15) D
Step-by-step explanation:
14
You have 80 minutes on a CD, minus the time you burned would equal the time you have left on the CD.
15
To find mark down, you multiply the percentage to the original price, and then subtract the answer to the original price.
0.2 0.3 1 3.2 9 skskskksks
Find the marginal density for
by integrating the joint PDF over all possible values of
:


Then the density of
conditioned on
is

for
and undefined elsewhere.
Thus

= = =
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I think it would be 70382