Answer:
1 cm
Step-by-step explanation: WOOOO brainiest pls
The 4th term of the sequence can be determined as,

Thus, option (b) is correct.
R/9 = -21
Multiply by 9
r = -189
Answer:
C
Step-by-step explanation:
The x's can not completely cancel each other out so they are still included but you have to divide the numbers, exponents and whole numbers.