I’ll change math ,because it’s hard but not that hard .
Answer: Their for the first one and They're for the second one.
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G5=243
Explanation:
Gn=r⁵¯¹G1
given a1/g1=3 & r=3 then substitute in the formula at the above then we will get
G5=3⁵¯¹ (3)
G5 =3⁴(3)
G5=81(3)
G5=243
A is correct answer.
Reinforcement is the exercise in a relationship.
Hope it helped you.
-Charlie