Joy Blazofsky: Math Quiz

  1. \( x^3 – 3x^2 – 10x = 0\)
  2. \( (1+ r)^n\)
  3. \( (5.7 \times 10^{-8}) \times (1.6 \times 10^{12}) = 9.12 \times 10^4\)
  4. \( \pi L (1 – \alpha ) R^2 = 4 \pi \sigma T^4 R^2\)
  5. \( 12 \text { km } \times \frac {0.6 \text { mile }}{1\text{ km }} \approx 7.2 \text { mile }\)

\[ 12 \text { km } \times \frac {0.6 \text { mile }}{1 \text{ km }} \approx 7.2 \text { mile } \]

6. \( 4, 173, 445, 346.50 \approx 4,200,000,000 = 4.2 \times 10^9 \)

7. \[ 50 \text { m } \times \frac {3.4 \times 10^6 \text { km }}{ 1 \text { sec }} \times \frac {10 \text { J }}{1 \text { kg } \cdot 1 \text { m }} = 1.7 \text { GW }\]

8. \( \$ 5,000 \times (1 + 0.012) ^ {30} \approx \$ 7,150\)

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