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The number of DVDs sold at Bob's store can be modeled by

the function N (t) = 4 +3 and the price per DVD can be

modeled by the function P(t) = 7 - 2 + 7.2 where t is

the number of years since 2002.

According to this model, what is the total amount of revenue

generated by Bob's DVD sales in the year 2010?

step-by-step explanation:

how many centimeters did the level of the salsa go down by?

m a t h w a y. c o m

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560