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.

Step-by-step explanation:

Given the expression f(t, r) = 13t - 8r²

We are to justify Ava solution at when t = -10 and r = -2

Substitute the given values into the function given;

f(t, r) = 13t - 8r²

f(-10, -2) = 13(-10) - 8(-2)²

f(-10, -2) = 13(-10) - 8(4)

f(-10, -2) = -130-8(4)

f(-10, -2) = -130 - 32

f(-10, -2) = -152

Ava made a mistake in step 4. She added -130 to -8 to get -138 before multiplying by 4 thereby falsifying her result. She must have multiplied -4 by 8 before adding the resulting answer to -130 as shown. Hence the correct answer is -152

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step-by-step explanation:

answer: 0.1,0.85

step-by-step explanation: