now it’s time to practice on your own\nthe average distance from earth to the moon is about 3.8×10^5…

now it’s time to practice on your own\nthe average distance from earth to the moon is about 3.8×10^5 km.\nthe average distance earth to the sun is about 1.49×10^8 km.\nhow many times as great is the average distance from earth to the sun than the average distance from earth to the moon?\n392\n2550\n3920\n5662

now it’s time to practice on your own\nthe average distance from earth to the moon is about 3.8×10^5 km.\nthe average distance earth to the sun is about 1.49×10^8 km.\nhow many times as great is the average distance from earth to the sun than the average distance from earth to the moon?\n392\n2550\n3920\n5662

Answer

Explanation:

Step1: Set up the division

We need to divide the distance from Earth - to - Sun by the distance from Earth - to - Moon. The distance from Earth to the Sun is $1.49\times10^{8}$ km and from Earth to the Moon is $3.8\times 10^{5}$ km. So the expression is $\frac{1.49\times 10^{8}}{3.8\times 10^{5}}$.

Step2: Use the rule of exponents for division

According to the rule $\frac{a\times10^{m}}{b\times10^{n}}=\frac{a}{b}\times10^{m - n}$, we have $\frac{1.49}{3.8}\times10^{8 - 5}$.

Step3: Calculate the coefficient and the exponent part

$\frac{1.49}{3.8}\approx0.392$ and $10^{8 - 5}=10^{3}$. Then $0.392\times10^{3}=392$.

Answer:

A. 392