Final answer:
The question involves chemistry, focusing on calculations with significant figures, proper units, and linear or quadratic equations, likely from a Chemistry Advanced Placement Examination context.
Step-by-step explanation:
The question you've asked appears to be related to chemistry and specifically references material that might be found on the Chemistry Advanced Placement Examination. When dealing with significant figures and proper units, it's essential to maintain precision in your calculations to accurately convey the certainty of your measurements and to use units that clearly communicate the quantity measured.
To enter data and calculate a linear equation to four decimal places, you'll need to use a calculator or a computer software that allows for data analysis and the plotting of linear trends. For example, after plotting your data points, you might use a least squares fit to determine the best straight line that goes through the data, which will then give you the equation in the form y = mx + b, with m representing the slope and b the y-intercept.
In another instance, solving a quadratic equation of the form at² + bt + c = 0 involves using coefficients (in this case, a = 4.90, b = 14.3, and c = -20.0) and applying the quadratic formula to find the time ('t'). The roots of the equation (possible solutions for 't') can be calculated to determine the specific times at which the expected outcomes occur.