Answer:
-14 (C)
Step-by-step explanation:
2 x -7 would be -14 because 2 x 7 is 14, but since 7 is negative it would be -14/C
Answer:
I would be 14 30 ok the answer is 30
Answer:
x=18
Step-by-step explanation:
The Answer should be Circle , Square
Answer:
36.58% probability that one of the devices fail
Step-by-step explanation:
For each device, there are only two possible outcomes. Either it fails, or it does not fail. The probability of a device failling is independent of other devices. So we use the binomial probability distribution to solve this question.
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.
A total of 15 devices will be used.
This means that 
Assume that each device has a probability of 0.05 of failure during the course of the monitoring period.
This means that 
What is the probability that one of the devices fail?
This is 


36.58% probability that one of the devices fail