Final answer:
The student's question requires the evaluation of a function r(t) at t=1 and t=2, but the specific function r(t) is not provided, making it impossible to calculate the values of r(1) and r(2) without additional information.
Step-by-step explanation:
The question seems to be about finding the values of function r(t) at specific points, specifically r(1) and r(2). However, there is no explicit function given for r(t).
Without the specific form of r(t), we cannot calculate the exact values for r(1) and r(2). Typically, r(t) could be any mathematical function representing a relationship where t stands for the independent variable (often time) and r represents the dependent variable.
In some of the contexts provided, r appears to refer to rate or radius, depending on the equation. For instance, the equation Rate(r) = k(r)[B], refers to chemical kinetics where r would symbolize the rate of the reverse reaction, and in the context of planetary motion where r could symbolize the average radius of an orbit.
We come across various equations such as r³/T² is constant for all planets; this is related to Kepler's third law, which is a concept in physics and astronomy. Also, there are graphical representations involving force over time but without clear reference to function r(t).
Therefore, it's important to confirm the exact function for r(t) before proceeding with the evaluation.