Answer:
Answer : 1,3,5,15
Step-by-step explanation:
The factors of 15.
Answer:
The students got 3 signatures on first day.
Step-by-step explanation:
We are given the following in the question:
The number of signatures students get each day is 3 times as many as the day before.
Thus, the number of signatures form a geometric progression with common ratio 3.
Number of signatures on sixth day = 
term in a geometric progression is given by:
where a is the first term of the series and r is the common ratio.
Thus, the first term of geometric progression is 3.
Thus, the students got 3 signatures on first day.
Answer: to avoid bias and to get a representative sample
Step-by-step explanation:
A random sample is useful for:
Avoid bias: if you have a selected sample, all of the selected individuals may have some common factor (same age group, same salary rage, same political ideology) so the sample may be kinda biased, this is something that you may want to avoid.
All the other options can not be ensured by any method, you survey, even with a random sample, may have no significant result, and you can not ensure that the surveyed people will answer truthfully.
Answer:
Zero
Step-by-step explanation:
Failure Rate = 1 in every 5 hours
It is important to consider the time that it takes for 2 components to fail
* Standard deviation is not given for failure rate hence it is assumed to be zero.
What is the probability that 12 hours will elapse before 2 components fail?
In other words, what is the probability that it takes 12 hours for 2 components to fail?
This probability is = 0
This is because the time it takes for 2 components to fail is 10 hours.
No adjustment can be made for this time, as there is no stipulated standard deviation.
Answer:
36
Step-by-step explanation:n 6x6 is 36
