5.8 x 10 to the power of 8 - 2.9 x 10 to the power of 7
To subtract these numbers in scientific notation, you first need to ensure that both numbers have the same exponent. In this case, rewrite 2.9 x 10^7 as 0.29 x 10^8 (moving the decimal point one place to the left).
Now, you can subtract the numbers:
5.8 x 10^8 - 0.29 x 10^8 = (5.8 - 0.29) x 10^8 = 5.51 x 10^8