Step-by-step explanation:
volume of cylinder=π(d/2)²h=π/4×10²×10=250πcm³
Yes it is. log(1) and ln(1) both equal zero. But you cannot take the logarithm of 0.
For this case we have the following equation:

We must clear the variable "x":
We multiply by 2 on both sides of the equation:

We divide by h on both sides of the equation:

We subtract "a" on both sides of the equation:
Answer:
They are both equal. 96/12=8
And 8x12=96.
Hope that helped!