Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\left. \begin{array} { l } { = \pi x ^ { 2 } l } \\ { = 3.14 \times ( 7 \times 10 ^ { - 10 } ) ^ { 2 } \times 10 \times 10 ^ { 10 } } \end{array} \right.$$

Answer

$$159119.8*10^-20$$

Solution


Simplify.
\[22731.4\times 7\times {10}^{-10}\times {10}^{-10}\]
Simplify  \(22731.4\times 7\)  to  \(159119.8\).
\[159119.8\times {10}^{-10}\times {10}^{-10}\]
Use Product Rule: \({x}^{a}{x}^{b}={x}^{a+b}\).
\[159119.8\times {10}^{-20}\]
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