\( x^3-3x^2-10x=0 \)

\( (1+r)^n \)

\( (5.7\times10^{-8})\times(1.6\times10^{12})=9.12\times10^4 \)

\( \pi L(1-\alpha)R^2=4\pi\alpha T^4R^2 \)

\( 12\text{ km}\times\frac{0.6\text{ mile}}{1\text { km}}\approx7.2\text{ mile} \)

\[ 12\text{ km}\times\frac{0.6\text{ mile}}{1\text{ km}}\approx7.2\text{ mile} \]

\( 4,173,445,346.50\approx4,200,000,000=4.2\times10^9 \)

\[ 50\text{ m}\times\frac{3.4\times10^6\text{ kg}}{1\text{ sec}}\times\frac{10\text{ J}}{1\text{ kg}\cdot1\text{ m}}=1.7\text{ GW} \]

\( \$5,000\times(1+0.012)^{30}\approx\$7,150 \)