Final answer:
This quadratic equation cannot be evaluated without the values of f, b, and d.
Step-by-step explanation:
This expression is a quadratic equation of the form at² + bt + c = 0, where the constants are a = 4.90, b = -14.3, and c = -20.0. Its solutions are given by the quadratic formula:
-b ± √(b² - 4ac) / 2a
However, without knowing the values of f, b, and d, we cannot evaluate the expression and determine its value. Therefore, the correct answer is A) The expression is incomplete and cannot be evaluated.