Author Archives: spg5164

\(x^{2}+x-20=(x-4)(x+5)\) \(10.5(1+r)^{30}\) \((6.71\times 10^{8})\times (2.3\times 10^{-4})\approx 1.54\times 10^{5}\) \(\pi L(1-\alpha)R^{2} = 4\pi \sigma T^{4}R^{2}\) \(56\text {mi} \times \frac {1.61\text{km}}{1\text{mi}}\approx 90\text{km}\) \[56\text {mi} \times \frac {1.61\text{km}}{1\text{mi}}\approx 90\text{km}\] \($10,000,000\times (.98)^{100}\approx $1,300,000.\) \(7,681,118,346\approx 7,700,000,000=7.7\times 10^{9}\) \[150\text {m}\times \frac {4.5\times 10^{6}}{1\text {sec}}\times \frac{10\text {J}}{1\text … Continue reading →