Question

calculate. (3.945×10^7) - (2.6×10^4) write your answer in scientific notation.

Explanation:

Step1: Rewrite numbers with same exponent

Rewrite $2.6\times 10^{4}$ as $0.0026\times 10^{7}$.

Step2: Subtract the coefficients

$(3.945 - 0.0026)\times10^{7}=3.9424\times 10^{7}$

Answer:

$3.9424\times 10^{7}$