Answer:
the unit rate for it would be 1/4
2) $3.85
5)125
7)175cm
10) 10 000cm2
11) $4.10
12)4
13)575mL
Answer:
Expected time is 15 hours for him to get to safety.
Step-by-step explanation:
We define X as the time that this miner would get to safety.
We define Y as the door he chooses initially.
P(Y= 1) = P(Y=2)=P(Y=3) = 1/3
We have E[X|Y=1] = 3
E[X|Y] = 5 hours + E[X}
E[X|Y] = 7 hours + E[X]
Then we have
E[X] = 1/3(3 + 5 + E[X] + 7 + E[X])
We cross multiply
3*E[X] = (15 + 2E[x])
3E[X] - 2E[X] = 15
E[X] = 15
So the time it would take to get him to safety is 15 hours
Wouldnt it be 21 idk dont pay attention to me lol
Answer:4
Step-by-step explanation:What +7=11 bause the () make a multiplication and 11x3=33
