Answer:
The correct answer is $12
Step-by-step explanation:
To check, subtract 12 from 31
31 - 12 =19
Multiply 19 by 2
19 x 2 =38
Add 12
38 + 12 =50
Write <em>z</em> in exponential form:

Then taking the logarithm, we get

so a is the correct answer.
Answer:
Ask ur mom she's nice
Step-by-step explanation:
So,
Optimally, we want a number between 1 and 10 multiplied by a power of ten.
If we move the decimal place 6 places to the right, we get 6.
So we want

.
The correct option is C.