Roy plans to go boating over the weekend. The boating club charges an initial fee of $30 to rent a boat, with an additional hourly rate for each hour the boat is in use.
Which graph represents the above situation correctly?
y
Boat Rental
Boat Rental
Cost ($)
90
80
70
60
8 so
40
30
20
10
45
40
35
30
25
20
15
10
5
X
X
0
1
0
1
2 3 4
Time (hours)
w.
2
Time (hours
X.
y
Boat Rental
Boat Rental
70
Cost ($
.88888888
45
40
35
30
25
20
15
10
2
0
2
4 6 8
Time (hours)
Y.
4 6 8
Time (hours)
z.
OA W

y

Step-by-step explanation:

The price starts at $30 then by the hour increases.

It isn't w because that starts at $40

and it isn't x or z because they are declining.

351°f

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