Question

The heart beats about 3 x 10° times during the lifetime of the average person. Which

number shows another way to write 3 x 10°?
300,000,000
30,000,000
3,000,000
3,000,000,000

Answer 1

3,000,000,000

Explanation:

3 x 10^9 = 3 x 1,000,000,000 because if it were 10^1, then there would be 1 zero. Same thing for this. Since it's 10^9, there will be 9 zeroes.