Answer:
A. 100
Step-by-step explanation:
Subtract the sides of the equation plus 5/6

So ;

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And we're done.
Thanks for watching buddy good luck.
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Step-by-step explanation:
this is clearly not a linear sequence (the terms don't have the same difference).
so, it has to be a geometric sequence.
the common ratio is r.
s2 = s1 × r
16 = 64 × r
r = 16/64 = 1/4
control :
s3 = s2×r
4 = 16 × 1/4 = 4
correct.