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Answer: B.
Step-by-step explanation:
When there is an exponent of another exponent, you can multiply them together:
As such, the expression in the image can be simplified to
, or r ^ -42.
Negative exponents can also be represented by positive exponents in the denominator of a fraction.
For instance, can be rewritten as
.
The correct answer is .
let's say is "x", thus "x" is the 100%, so, if "x" is the 100% and we know 12 is 20% of that, what's "x"?