Question

Devon checked a web site that gave daily updates on distances from Earth. He found that Pluto was 31.514 astronomical units (AU) from Earth. One AU = 149,600,000 kilometers. How many kilometers is Pluto from Earth expressed in scientific notation? Round the mantissa to the nearest thousandth.

Answer 1

The answer is C

Explanation:

Answer 2

C. 4.714*10^9

Explanation:

Multiply 31.514*14900000

the answer will be 4714494400

In all of the answers it shows 4.714. notice how the decimal is in between 4 and 7. count the numbers and stop once you're at 7. there are 9 numbers. so it will be 4714494400 to the 9th power. which is 4.714*10^9 .