Question

evaluate.
$10^{-7}$

Explanation:

Step1: Apply negative exponent rule

A negative exponent means the reciprocal of the positive exponent: $a^{-n}=\frac{1}{a^n}$
So $10^{-7}=\frac{1}{10^7}$

Step2: Calculate positive power

$10^7 = 10\times10\times10\times10\times10\times10\times10 = 10000000$

Step3: Write final fraction/decimal

$\frac{1}{10^7} = 0.0000001$

Answer:

$0.0000001$ or $\frac{1}{10000000}$