2. Ebony’s bank balance first reached $400 on Day 4. The last day her balance was $400 was Day 8. (a) Determine b5 b6 b7 . Explain how you determined these amounts.
(b) Estimate b1 b2 b3 . Explain how you determined these amounts.
(c) Jade said that the amount of money Ebony took out of her account each day between Day 8 and Day 12 was the same amount of money she put into her account each day between Day 0 and Day 4. Recall that Day 12 is when the balance first reached $0. Without doing any calculations, how could you show Jade why that cannot be true?