Question

Subtract 2.5 x 10⁸ from 4.7 x 10⁸.

a) 2.2 x 10⁸
b) 2.2 x 10⁹
c) 2.2 x 10⁷
d) 2.2 x 10⁶

Answer 1

Subtracting 2.5 x 10⁸ from 4.7 x 10⁸ by subtracting the coefficients results in 2.2. The power of ten remains unchanged, resulting in the answer of 2.2 x 10⁸.The correct option is A.

Step-by-step explanation:

To subtract 2.5 x 10⁸ from 4.7 x 10⁸, you need to perform the subtraction on the coefficients (the numbers before the powers of ten) while keeping the power of ten constant because they are the same. Both numbers have a power of 10⁸, so you simply subtract 2.5 from 4.7. This gives:

4.7 - 2.5 = 2.2

Since the power of ten is the same for both numbers (10⁸), it remains unchanged in the answer:

2.2 x 10⁸

Therefore, the correct answer is a) 2.2 x 10⁸.