The best way to randomly choose the 100 families would be to allow a random number generator to come up with 100 families within a 50 radius of the amusement park.
Using this method would ensure that it is more randomised & not limited to people who come at a specific time or are in a specific area as well as it not be affected by subconscious bias of people when selecting people to survey.
We know the following relationship:

The
domain of a function are the
inputs of the function, that is, a function

is a relation that assigns to each element

in the
set A exactly one element in the
set B. The set A is the domain (or set of inputs) of the function and the set B contains the range (or set of outputs).Then applying this concept to our function

we can write its domain as follows:
1. D<span>
omain of validity for 
:
</span>
When:

?
when:
where k is an integer either positive or negative. That is:

To match this with the choices above, the answer is:
<span>
"All real numbers except multiples of
"
</span>
2. which identity is not used in the proof of the identity 
:
This identity can proved as follows:

The identity that is not used is as established in the statement above:
<span>
"1 +cos squared theta over sin squared theta= csc2theta"
Written in mathematical language as follows:
</span>

<span>
</span>
Answer:
C. The height of each bar represents the category's frequency or relative frequency
Step-by-step explanation:
Answer: Arnav is 1.8m
Step-by-step explanation: I multiplied 1.5 by 0.20 and then added that answer to 1.5 and then I got 1.8
:D