Quiz – Sept 18 – Math Typesetting

$x^2+x-20=(x-4)(x+5)$
$10.5(1+r)^{30}$
$ (6.71 \times 10^{8}) \times (2.3 \times 10^{-4}) \approx 1.54 \times 10 ^{5}$
$\pi L(1-\alpha)R^2=4\pi\sigma T^4R^2$
$56 \text{ mi} \times \frac{1.61 \text{ km}}{1 \text{ mi}} \approx 90 \text{ km}$.
$56 \text{ miles}\times \frac{1.61\text{km}}{1 \text {mi}} \approx 90 \text{ km}$
$$10,000,000 \times (0.98)^{100} \approx $1,300,000$
$7,681,118,346 \approx 7,700,000,000 = 7.7 \times 10^{9}$
\[ 150 \text{ m} \times \frac{4.5 \times 10^{6} \text{ kg}}{1 \text{ sec}} \times \frac{10 \text{ J}}{1 \text{ kg} · 1 \text{ m}} = 6.75 \text{ GW} \]

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