Answer:
5.21x 10^19 and 3.149x 10^17 = 5.24149x10^19
Explanation:
- To find the sum of numbers in scientific notation, you need to make sure that the exponents are the same. In this case, you can rewrite 3.149x10^17 as 0.03149x10^19 to match the exponent of 5.21x10^19.
- Now, you can simply add the two numbers: 5.21x10^19 + 0.03149x10^19 = 5.24149x10^19
- So, the sum is 5.24149x10^19.