2. Ava bought a new computer and is now $249 in debt. How much money does Ava have? (-$249)
What does $0 represent in this problem?

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Use sigma notation to represent the following series for 9 terms.