Question

What is 521,000,000 expressed in scientific notation? A. 5.21x 10^8 B. 5.21x10^9 C. 0.521x10^-9 D. 0.521x10^9

Answer 1

Answer:

A. $5.21*10^{8}$

Step-by-step explanation:

Multiplying by $10^{n}$ moves the decimal point n places to the right.

Doing so 8 times for 5.21 gives 521,000,000.