## Thinking Mathematically (6th Edition)

Simplify the above exercises. Now, Simplify,$0.41\times {{10}^{6}}$: \begin{align} & 0.41\times {{10}^{6}}=4.1\times {{10}^{5}} \\ & =410000 \end{align} Simplify,$0.57\times {{10}^{9}}$: \begin{align} & 0.57\times {{10}^{9}}=5.7\times {{10}^{8}} \\ & =570000000 \end{align} Simplify,$2100\times {{10}^{-9}}$: \begin{align} & 2100\times {{10}^{-9}}=2.1\times {{10}^{-6}} \\ & =0.0000021 \end{align} Use Ti-83 to find the answer. Step 1: Press $\text{ON}$ key. Step 2: Enter the entity as$0.41\times {{10}^{6}}$and then press $\text{ENTER}$key. $0.41\times {{10}^{6}}=410000$ Step 3: Enter the entity as$0.57\times {{10}^{9}}$and then press $\text{ENTER}$ key. $0.57\times {{10}^{9}}=570000000$ Step 4: Enter the entity as$2100\times {{10}^{-9}}$and then press$\text{ENTER}$key. $2100\times {{10}^{-9}}=0.0000021$ Hence, from the above calculation the answer is verified.