Find the sum of 5.21 × 1019 and 3.149 × 1017.
a) 8.359 × 1019
b) 5.24149 × 1019
c) 5.24149 × 1036
d) 8.359 × 1036
To find the sum of these two numbers, we need to add the numbers and keep track of the powers of 10.
5.21 × 10^19 + 3.149 × 10^17
To add these numbers, we need to align the decimal points by moving 3 places to the right for 3.149 × 10^17, giving us:
5.21 × 10^19 + 0.003149 × 10^19
Adding these numbers gives us:
5.213149 × 10^19
So the correct answer is:
a) 5.213149 × 10^19