Answer:
(A)

(B)

Step-by-step explanation:
(A)
we are given


Firstly, we will find few terms









so, we will get terms as
5, 7 , 9 , 11
we can see that this is arithematic sequence
First term =5
common difference =d=7-5=2
now, we can use nth term formula

now, we can plug values



(B)
we can plug n=10


Answer:
It is not linear
Step-by-step explanation:
Use Pythagorean therom to find if the 3 side lengths make a triangle
-8a^8b^-2/10a^-4b^-10
= (-8/10) a^(8+4)b^(-2+10)
= -4/5 a^12 b^8
=-4 a^12 b^8 / 5
Answer is A.) -4 a^12 b^8 / 5
What do you mean? At first it was 4 times as old, then it's twice her age?