Question

what's 10 to the negative second power times 10 to the negative 10th power

Answer 1

10^-2*10^-10 = 10^-12

Answer 2

If bases are same, you can simply add exponents.

10⁻² × 10⁻¹⁰ = 10⁽⁻² ⁺ ⁻¹⁰⁾ = 10⁻¹²

Final answer: 10⁻¹²