Ebony’s bank balance first reached $400 on Day 4. The last day her balance was $400 was Day 8. (a) Determine.
Explain how you determined these amounts.

(b) Estimate.
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?