what is (7*10^8)-(4*10^6) using the scientific notion?

Answer 1

To express the given expression (7*10^8) - (4*10^6) in scientific notation, we can simply combine the powers of 10 and subtract the coefficients.

(7*10^8) - (4*10^6) = 7*10^8 - 4*10^6

To subtract them, we need to align the powers of 10. So, we can rewrite 4*10^6 as 0.4*10^7 (or simply 4*10^6 = 4.0*10^6 since the power of 10 remains the same).

Now, let's subtract the coefficients:

7*10^8 - 4*10^6 = 7*10^8 - 0.4*10^7

Since the powers of 10 are the same (8), we can subtract the coefficients:

7*10^8 - 0.4*10^7 = 6.6*10^8

Thus, (7*10^8) - (4*10^6) in scientific notation is 6.6*10^8.