Problem 162 of 7
Solve the quadratic context and identify the valid solution: A ball is dropped from a height of 64 feet. The height is given by h = -16t^2 + 64. When does it hit the ground?.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
solve and reject irrelevant roots.
Hidden until you reveal it.
Context must make at least one algebraic solution invalid or require contextual interpretation.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Write and solve the quadratic equation.
2. List all algebraic roots.
3. Use the context to keep only meaningful roots.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Negative length/time answers when the context requires a positive quantity.