Blah blah blah blah blah blah <- (to fill space) the answer is C
Answer:
c
Step-by-step explanation:
Answer:
20 seconds
Step-by-step explanation:
I assume you mean
for your function.
As the given function is in the form of
(some textbooks may write this formula differently), the period is equal to
. Hence, the period of the given function is
, or 20 seconds.
Answer:
0.8746 = 87.46% probability of at least 6 failures in 7 trials.
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which
is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
7 trials
This means that 
The probability of success in any trial is 9%?
So the probability of a failure is 100 - 9 = 91%, which means that 
Probability of at least 6 failures in 7 trials?
This is:

In which




0.8746 = 87.46% probability of at least 6 failures in 7 trials.
Counterexample: 27 is divisible by 3 but is not divisible by 6