Final answer:
The reasonable estimate for the solution is option c) 0.8-1.
Step-by-step explanation:
The reasonable estimate for the solution is option c) 0.8-1.
To determine the reasonable estimate, we need to consider the given information. From the question, we know that if 1/5 = 5A and 13 = -2A, we need to find the value of 12. We can solve for 12 by setting up a proportion:
1/5 = 5A/13
By cross-multiplying, we get:
13 * 1 = 5A * 5
13 = 25A
A = 13/25
Therefore, 12 will be equal to (5A * 12) = (5 * 13/25 * 12) = 3A. Since option c) 0.8-1 best represents 3A, it is the reasonable estimate for the solution.