5.7 × 10^7 km - 4.5 x 10^9 km
To subtract these numbers, we need to have the same exponent on the powers of 10. We can do this by expressing both numbers in scientific notation with the same exponent.
5.7 × 10^7 km can be written as 0.57 × 10^8 km, and
4.5 × 10^9 km can be written as 45 × 10^8 km.
Now we can subtract these two numbers:
0.57 × 10^8 km - 45 × 10^8 km = (0.57 - 45) × 10^8 km
= -44.43 × 10^8 km
So, 5.7 × 10^7 km - 4.5 × 10^9 km equals -44.43 × 10^8 km.
To subtract these two numbers in scientific notation, you need to ensure that the exponents are the same. First, let's rewrite the numbers in standard form:
5.7 × 10^7 km = 57,000,000 km
4.5 × 10^9 km = 4,500,000,000 km
Now, we can subtract these two numbers:
4,500,000,000 km - 57,000,000 km = 4,443,000,000 km
So, the result of subtracting 5.7 × 10^7 km from 4.5 × 10^9 km is 4,443,000,000 km.
To subtract these numbers, we need to have the same exponent value. Let's convert both numbers to have the same exponent.
5.7 × 10^7 km = 0.57 × 10^8 km (since moving the decimal one place to the left, we increase the exponent by 1)
Now we can subtract the two numbers:
0.57 × 10^8 km - 4.5 × 10^9 km
= (0.57 - 4.5) × 10^8 km (since both numbers have the same exponent)
= -3.93 × 10^8 km
Therefore, the result of 5.7 × 10^7 km - 4.5 × 10^9 km is -3.93 × 10^8 km.