Point estimate is the method of looking for an approximate value of some parameter - example: the mean (average) and it could be also the sample standard deviation of a population from random samples of the population.
To get the point estimate: 20 (people wearing hearing aids) / 304 (total random sample) = 0.0657894 or 0.066
Answer is 9r
Because 9x3 is 27
Also no clue about the brainliest thing
Answer: The required set-builder notation is :

Step-by-step explanation: We are given to write the following set B in set-builder form :
the set B consists of all natural numbers less than or equal to 100.
In set-builder form, a variable x is used to represent each and every element of the set.
Therefore, the set B in set-builder form can be written as :

Thus, the required set-builder notation is :

Answer:
Did you finish these?
Step-by-step explanation:
I do not know what subject it is.
Answer: 169
Step-by-step explanation:
52 divided by 4 is 13 so 13 times 13 is 169