2. A company has been asked to design a building for an athletic event. The building is in the shape of a square pyramid. The pyramid has a height of 481 feet, and the length of each side of the base is 756 feet. What is the approximate volume of the pyramid? \( 1.21 \times 10^{5} \mathrm{ft}^{3} \) \( 4.85 \times 10^{5} \mathrm{ft}^{3} \) \( 9.16 \times 10^{7} \mathrm{ft}^{3} \) \( 2.75 \times 10^{8} \mathrm{ft}^{3} \)

Bài 3. Cho \( D A B C \) có \( A B<A C \). Trên tia \( B A \) lấy điểm \( D \) sao cho \( B D=B C \). Nối \( C \) với \( D \). Tia phân giác góc \( B \) căt cạnh \( A C, D C \) lần lượt tại \( E \) và \( I \).

Bài 3. Cho \( D A B C \) có \( \mathrm{AB}<\mathrm{AC} \). Trên tia BA lấy điểm D sao cho \( \mathrm{BD}=\mathrm{BC} \). Nối C với D . Tia phân giác góc B că̆t cạnh \( \mathrm{AC}, \mathrm{DC} \) lần lượt tại E và I . \( \begin{array}{ll}\text { a) Chứng minh } \triangle \mathrm{BED}=\triangle \mathrm{BEC} \text {. } & \text { b) Chứng minh } \mathrm{IC}=\mathrm{ID} \text {. } \\ \text { c) Từ } A \text { vẽ đường thẳng } \mathrm{AH} \text { vuông góc với } \mathrm{DC}(\mathrm{H} \text { thuộc } \\ D C) \text {. Chứng minh } \mathrm{AH} / / \mathrm{BI} \text {. } & \end{array} l \)

QUESTION \( 16 \cdot 1 \) POINT Find the equation of the line passing through the points \( (-2,5) \) and \( (-7,5) \).

एक गोलाकार काँच के बर्तन की एक बेलन के आकार की गर्यन है, जिसकी सम्बाई 7 सेमी तया व्यास 2 सेमी है, जबकि गोलाकार भाग का व्यास 8.4 सेमी है। छ्रात कीजिए कि बर्तन में कितना पानी भरा जा सकता है?

Determine if the following lines are parallel, perpendicutar, or neither. \[ \begin{array}{l}y=\frac{x}{3}-7 \\ y=-3 x+5\end{array} \]