What is the value of the underlined digit? 4,507,205,395.98

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol