Question

Just get the right answer 20 points

Answer 1

Answer:

$\large \boxed{\text{(B) } 3\times 10^{8}}$

Step-by-step explanation:

To figure out how many times a number is than another, you divide the larger number by the smaller.

Here, your numbers are expressed in scientific notation, so you

1. Divide the coefficients and the exponentials separately

$\dfrac{12 \times 10^{12}}{4 \times 10^{4}} = \dfrac{12}{4} \times \dfrac{10^{12}}{10^{4}}$

2. Divide the coefficients

$\dfrac{12}{4} = 3$

3. Divide the exponentials

Subtract the exponent in the denominator from the exponent in the numerator.

$\dfrac{10^{12}}{10^{4}} = 10^{(12 - 4)} = 10 ^{8}$

4. Re-join the new coefficient and the new exponential

$\dfrac{12 \times 10^{12}}{4 \times 10^{4}} = \large \boxed{\mathbf{3\times 10^{8}}}$