Answer:
180 degree angles.
Step-by-step explanation:
180 degree angles are straight lines.
Given:
second term = 18
fifth term = 144
The nth term of a geometric sequence is:

Hence, we have:

Divide the expression for the fifth term by the expression for the second term:

Substituting the value of r into any of the expression:

Hence, the explicit rule for the sequence is:
The mean is 11.666666666667
The median is 13
The mode is 14, 22, 15, 7, 0, 12
Hopefully it helps u
Answer:
b
Step-by-step explanation:
Evaluate using the definition
n
= 
where n ! = n(n - 1)(n - 2)(n - 3)..... × 3 × 2 × 1
Given
9
= 
= 
= 
Cancel 6.5.4.3.2.1 on numerator and denominator, leaving
= 
= 
= 84 → b
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