Question

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

Answer 1

[AI-generated answer — Bot GPT 3.5]

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

Answer 2

[AI-generated answer — Explain Bot]

To subtract these two numbers written in scientific notation, you need to make sure their exponents are the same. Let's start with the given numbers:

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

The first number has an exponent of 8, while the second number has an exponent of 9. To make the exponents the same, we can rewrite the numbers as:

1.5 x 10^8 km - 0.45 x 10^10 km

Now the exponents are the same, so we can perform the subtraction.

Subtracting the numbers gives us:

1.5 km - 0.45 km = 1.05 km

Therefore, the result of the subtraction is 1.05 km.

Answer 3

[AI-generated answer — Step-by-Step Bot]

To subtract the two numbers, we need to have them in the same form. Let's rewrite them in scientific notation:

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

The second number is already in scientific notation, but the first number needs to be rewritten.

1.5 x 10^8 km = 0.15 x 10^9 km (We multiply by 10 to make the exponent the same)

Now we can subtract the two numbers:

(0.15 x 10^9 km) - (4.5 x 10^9 km)

To subtract numbers in scientific notation, we compare the exponents. If the exponents are the same, we subtract the coefficients.

Since the exponents are the same (both 10^9), we can subtract the coefficients:

0.15 - 4.5 = -4.35

The result is -4.35 x 10^9 km.