Answer:
1.9
Step-by-step explanation:
First step would be to separate r from t

Then just insert the numbers

The first term is 8, so 
Each time we want a new term, we add on 3
8+3 = 11
11+3 = 14
14+3 = 17
17+3 = 20
23+3 = 26
and so on
This recursive step of adding on 3 to the prior term is written as this:
which says "to get the nth term, add 3 to the term just before the nth term"
Based on what you posted for your answer choices, the final answer is likely choice C. However it seems some weird typo happened.
Answer:23 cm
Step-by-step explanation:
Because it would equal the same amount because there are 10 mm in a cm
3.14(3(2) + 3(4))
3.14( 6 + 12)
3.14(18)
=56.52
-19m-19 = 4m-4m+19
-19m-19 = 0+19
-19m = 19+19
-19m = 38
m = 38÷(-19)
m = -2