Question

$(9\times {10}^{-2})+(9\times {10}^3)$ in usual form is

• A. 0.00009
• B. 0.000009
• C. 90 × 10^-4
• D. 0.009 × 10^-4

Answer 1

The correct option is A

0.00009

The usual forms of the expressions $9\times {10}^{-2}$ and $9\times {10}^3$ are given by $0.09$ and $9000$.
Thus, $9000+0.09=9000.09$.