option a as 3 is outside of bracket it will be multiplied by what is in bracket sot the answer will equivalent to question
5/8 9/x
Cross multiply
9x8=72
5×x=5x
Rewrite the equation
72 = 5x
Divide by 5
72÷5=14.4
So, x=14.4
158, it's going up by 6 every time.
I’m pretty sure your counting by 3’s because It’s goes 9,3 . However it might be in the negatives
V=1/3(pi)(r)^2(h)
V=1/3(pi)(9)^2(15)
V=1/3(3.14)(81)(15)
Then multiply all numbers in parentheses:
3815.1/3=1271.7 cm^3
Hope this Helps!