• always use significant figure rules. remember that these rules apply to all numbers that are measurements…

• always use significant figure rules. remember that these rules apply to all numbers that are measurements. calculate 2 x 10⁻³cm ÷ 2.5 x 10⁴cm\n8 x 10¹\n8 x 10⁻¹\n0.8 x 10⁻⁷\n8 x 10⁻⁸

• always use significant figure rules. remember that these rules apply to all numbers that are measurements. calculate 2 x 10⁻³cm ÷ 2.5 x 10⁴cm\n8 x 10¹\n8 x 10⁻¹\n0.8 x 10⁻⁷\n8 x 10⁻⁸

Answer

Explanation:

Step1: Dividir los coeficientes

Dividimos 2 entre 2.5: $\frac{2}{2.5}=0.8$

Step2: Dividir las potencias de 10

Usamos la regla $\frac{a^m}{a^n}=a^{m - n}$, entonces $\frac{10^{- 3}}{10^{4}}=10^{-3-4}=10^{-7}$

Step3: Multiplicar los resultados

$0.8\times10^{-7}$. Pero para escribirlo en notación científica correcta, $0.8 = 8\times10^{-1}$, entonces $0.8\times10^{-7}=8\times10^{-1}\times10^{-7}=8\times10^{-8}$

Answer:

D. $8\times10^{-8}$