Question

Find the sum of (2.8 × 10−9) and (9.1 × 10−10). Write the final answer in scientific notation.

11.9 × 10−19
1.19 × 10−18
3.71 × 10−10
3.71 × 10−9

Answer 1

The answer is C: 3.71 × 10−9.

Explanation:

Answer 2

Answer:
`3.71 * 10^(-9)`

Explanation:

`(2.8 * 10^(-9))+(9.1 * 10^(-10))\\\\=10^(-10)(28+9.1)\\\\=10^(-10)(37.1)\\\\=3.71 * 10^(-9)`