The function b(r)=7+4(r−1) represents the number of bricks in row r of a structure. what does the value 7 represent in this situation? answers choices a given row of bricks contains 7 more bricks than the previous row. there are 7 bricks in the first row of the structure. every row contains exactly 7 bricks. the structure contains 7 rows of bricks.

There are 7 bricks in the first row of the structure.

Step-by-step explanation:

Our function is b(r) = 7+4(r-1)

In this function, r is the row number.

If we substitute 1 in for r, we have

b(1) = 7+4(1-1) = 7+4(0) = 7+0 = 7

This corresponds with the 7 at the beginning of the function; this means that the 7 in the function is the number of bricks in the first row.

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