Question

(2.5×10−10)(7×10−6)

Express your answer in scientific notation.

1.75×1016
1.75×10−15
1.75×10−16
1.75×10−17

Answer 1

1.75*10-17 is the scientific notation

Answer 2

Answer:

In this question,

(2.5 × 10⁻¹⁰)(7 × 10⁻⁶)

We need to write the answer in scientific notation.

Therefore, 2.5 × 7 × 10⁻¹⁰ × 10⁻⁶

                  17.5 × 10⁻¹⁰ × 10⁻⁶

                  1.75 × 10 × 10⁻¹⁰ × 10⁻⁶

                  1.75 × 10 × 10⁻¹⁶

                  1.75 × 10⁻¹⁵

Hence, the scientific notation of the given equation is 1.75 × 10⁻¹⁵

Correct option is (b)  1.75 × 10⁻¹⁵