Find the gcf of 18a, 20ab,
and bab.

2a^2b

Step-by-step explanation:

(tried my best but can't be sure I remember how to do it correctly)

First, you find the GCF of 18 and 20, which is 2.

18 > 2 * 3 * 3

20 > 2 * 2 * 5

The next part is where I'm a little hesitant. I say there is an 'a' for each number and only one 'b', so we forget about the 'b' and write 'a^2.'

answer: ask

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