Question

What is the sum of 4.9 × 102 and 6.8 × 103? a. 1.17 × 103 b. 1.17 × 105 c. 1.17 × 107 d. 7.29 × 102 e. 7.29 × 103

Answer 1

The sum of 4.9 × 102 and 6.8 × 103 is 7.29 × 103, after converting 4.9 × 102 to the same power of ten as 6.8 × 103.

Step-by-step explanation:

To find the sum of 4.9 × 102 and 6.8 × 103, we need to express each number in the same power of ten to facilitate addition. Here's the step-by-step process:

1. Convert 4.9 × 102 to the same power of ten as 6.8 × 103:
   
   4.9 × 102 is equivalent to 0.49 × 103.
2. Add the two numbers 0.49 × 103 and 6.8 × 103:
   
   0.49 × 103 + 6.8 × 103 = (0.49 + 6.8) × 103 = 7.29 × 103.

Therefore, the sum is 7.29 × 103, which corresponds to option e.