Answer:
7.8 * 10^7
Step-by-step explanation:
Group coefficients together and exponents together to multiply numbers in scientific notation.
(
7.8 * 1
) (
10
^3 * 10^4)
Multiply 7.8 times 1.
7.8 * (10^3 * 10^4)
Use the power rule a^m * a^n = a^(m+n) to combine exponents. So, add 3 and 4
7.8 * 10^7
