Final answer:
The nᵗʰ term of the given sequence can be found by adding 3.1 to the previous term for each term. The formula to find the nᵗʰ term is termn = term1 + (n-1) * common difference. Therefore, the nᵗʰ term of the sequence is 18 + (n-1) * 3.1.
Step-by-step explanation:
The given sequence is: 18, 21.1, 24.2, 27.3, 30.4
To determine the nᵗʰ term, we can observe that each term is obtained by adding 3.1 to the previous term. So, the pattern is increasing by 3.1 for each term.
Therefore, the formula to find the nᵗʰ term is:
termn = term1 + (n-1) * common difference
Plugging in the values, we have:
termn = 18 + (n-1) * 3.1
So, the nᵗʰ term of the sequence is 18 + (n-1) * 3.1.