Answer:
a = 2
b = 3
c = 2³ or 8
Step-by-step explanation:
Exponent Rule: 
log₂(4) = 2 or 2² = 4
2⁵/2² = 2³
2³ = 8
9 < x
this means that x is a larger number than 9
9 = x
this means that x is equal to 9
The Answer is 1600
Hope this helps :)
An improper fraction is when the numerator is greater. For example, 1 7/8 = 15/8