Answer:
0.03125
Step-by-step explanation:
If we have a fair coin the probability of landing a head is 50%.
We can think the question as what is the probability of landing four tails and then a head. That is we needed at least 5 tries to get a head.

Since this events are independent we can write it as

Answer:
1 hour and 42 minutes
Step-by-step explanation:
[ ( |500,000-700,000| ) / 500,000 ] * 100 = 40%
Answer:
-80x+23
Step-by-step explanation:
First combine like terms..
-28x - 52x
In which you subtract you get..
-80x
21+2= 23
you combine them you get...
-80x+23