Question

1.5 x 10^8 km - 4.5 x 10^9 km

Answer 1

To subtract these numbers in scientific notation, we first need to make sure the exponents are the same.

Converting 1.5 x 10^8 km to scientific notation with an exponent of 9, we get 0.15 x 10^9 km.

Now, we can subtract the numbers:

0.15 x 10^9 km - 4.5 x 10^9 km = -4.35 x 10^9 km