Add 7.3 x 10^7 + 1.8 x 10^8.
To add 7.3 x 10^7 and 1.8 x 10^8, we need to make the exponents of the powers of 10 the same.
We can do this by rewriting 7.3 x 10^7 as 0.73 x 10^8 (which involves dividing the coefficient by 10 and increasing the exponent by 1).
Now we can add 0.73 x 10^8 and 1.8 x 10^8:
0.73 x 10^8 + 1.8 x 10^8 = (0.73 + 1.8) x 10^8
= 2.53 x 10^8
Therefore, 7.3 x 10^7 + 1.8 x 10^8 = 2.53 x 10^8.
To add numbers in scientific notation, you need to have the same power of 10.
Step 1: Rewrite the numbers with the same power of 10:
7.3 x 10^7 + 18 x 10^7.
Step 2: Add the numbers:
7.3 x 10^7 + 18 x 10^7 = (7.3 + 18) x 10^7.
Step 3: Calculate the sum:
7.3 + 18 = 25.3.
Step 4: Write the final answer:
25.3 x 10^7.
To add these two numbers, you need to first make sure they have the same exponent. In this case, both numbers are already written in scientific notation, so the exponents are the same (7 and 8).
To add them, you can simply add the coefficients (the numbers in front of the powers of 10). So, add 7.3 and 1.8:
7.3 + 1.8 = 9.1
Now, keep the same exponent (10^7) and write the sum of the coefficients:
9.1 x 10^7