Question

Can someone please help me with the solution to this problem?

Answer 1

(2.5*10⁻⁸)(9*10⁻¹⁰)=(2.5*9)(10⁻⁸⁻¹⁰)=22.5*10⁻¹⁸=2.25*10⁻¹⁸⁺¹=2.25*10⁻¹⁷.

Answer: 2.25*10⁻¹⁷

Answer 2

the answer is 2.25 × 10-18