38 yard piece for each student and there are 16 students:
38*16=608
608 yards needed for your class
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
Answer: It should be 11
Step-by-step explanation:
11 + 3 = 14 14 is three more than 11 and when you add 5 you get 19
14gallons=380miles
14/380=<span>0.03684210526gallons/mile
</span>
418*<span>0.03684210526=15.4gallons
</span>
or you could cross multiply
14gallons=380miles
x gallons=418miles
380x=5852
divide both sides by 380
x=15.4 gallons
Answer:
Can' possible......
Step-by-step explanation:
Let suppose the numbers are:
x
x + 1
x + 2
Now according to given condition:
x + x +1 + x+ 2 = -206
By adding we get:
3x + 3 = -206 Subtracting 3 from both sides:
3x + 3 - 3 = -206 -3
Both terms on right side have negative sign so we will add them. (answer will have negative sign.)
3x = -209
Dividing both sides by 3:
x = -209/3
x = -69.6666
that is not an integer so the question is wrong.
I hope it will help you!
