Answer:
In the case of the monthly electricity cost, the independent variables could also include the non-production machines using electricity, the physical size of the products, the skill level of the operators, the outside temperature and humidity, etc.
Step-by-step explanation:
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I might not be right but a is 2 and b is 16
Step-by-step explanation:
Answer:
Given the sets:
K = {2, 3, 5, 8} and L = {3, 5, 7}
To find the union of K and L i.e, 
Union set defined as the union (denoted by U) of a collection of sets is the set of all elements in the collection.

Therefore, union for the following sets is, {2,3,5,7,8}.
"D.neither line symmetry nor rotational symmetry. "A line segment can have neither line symmetry nor rotational symmetry. a line segment is a line that has boundaries..