4. For the three-step question that follows, provide your answer to each question in the given workspace. Identify each step with a coordinating response. Be sure to clearly label each part of yo response as Part A, Part B, and Part C.
Part A: Ava was asked to find the value of the expression 13t - 8r2 when t = -10 and r =
2. Her work is shown below, but she made a mistake. What was Ava's mistake?
13t - 8r2
13( - 10) - 80 - 2)
131 – 10) - 804)
130 - 8(4)
-138 - (4)
-552
Part B: Evaluate the expression correctly.
Part C: Show all of your work to support your answer to Part B.