Question

ПОМОГИТЕ, ЛЮДИ ДОБРЫЕ!

Answer 1

$18 {}^{ - 2} = \frac{1}{18 {}^{2} } = \frac{1}{324} \\ \frac{2.63 \times 10 {}^{ - 6} }{ {10}^{ - 8} } = 2.63 \times 10 {}^{ - 6 - ( - 8)} = 2.63 \times 10 {}^{ - 6 + 8} = 2.63 \times 10 {}^{2} = 263 \times 100 = 263$