Answer:
78.5
Step-by-step explanation:
12
First put the set in order from least to greatest:
4, 5, 6, 9, 10, 11, 12, 15, 16
To find the range you subtract the largest number by the smallest number.
So 16 - 4 = 12
So the range is 12.
2
The statement is a tautology.
We have the following statement:
To reduce the statement to a tautology we need to use the table of logical equivalences as follows:
by the the logical equivalence involving conditional statement.
by the Associative law.
by the Negation law.
by the Domination law.