Answer:
48
Step-by-step explanation:
c÷4=12
4×c÷4=4×12
c=48
Answer:is undefined
Step-by-step explanation:
ln x=0
Therefore x=1/0
Which is undefined function
Do that the answer is undefined
Answer: 
Step-by-step explanation:
By the negative exponent rule, you have that:

By the exponents properties, you know that:

Therefore, you can rewrite the left side of the equation has following:

Descompose 32 and 8 into its prime factors:

Rewrite:

Then:

As the base are equal, then:

Solve for x:

To find the area of a rectangle, multiply its length by its width. I suggest you use a calculator for accuracy in multiplication. Hope this helped!