Question

S

Answer 1

Answer: $1.6\times 10^4$

Explanation:

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as $5.0\times 10^3$

In division , the result would contain the same number of significant digits as there in the least precise number , thus the answer would have 2 significant digits.

$\frac{1.248\times 10^{-2}}{7.8\times 10^{-7}}=1.6\times 10^4$