SOLUTION: An object is thrown downward from a tower 280 feet high. The distance the object has fallen at time t in seconds is given by s(t) = 16t^2+68t. How long will it take the object to f

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: An object is thrown downward from a tower 280 feet high. The distance the object has fallen at time t in seconds is given by s(t) = 16t^2+68t. How long will it take the object to f      Log On


   

Question 1192770: An object is thrown downward from a tower 280 feet high. The distance the object has fallen at time t in seconds is given by s(t) = 16t^2+68t. How long will it take the object to fall 100 feet?
Found 2 solutions by Alan3354, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
An object is thrown downward from a tower 280 feet high. The distance the object has fallen at time t in seconds is given by s(t) = 16t^2+68t. How long will it take the object to fall 100 feet?
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s(t) = 16t^2+68t = 100
Solve for t.

Answer by ikleyn(52754) About Me  (Show Source):
You can put this solution on YOUR website!
.

To see many other solved similar and different problems,  look into the lessons
    - Problem on a projectile moving vertically up and down
    - Problem on an arrow shot vertically upward
    - Problem on a ball thrown vertically up from the top of a tower
    - Problem on a toy rocket launched vertically up from a tall platform
in this site.

Consider these lessons as your textbook,  handbook,  tutorials and  (free of charge)  home teacher.
Read them attentively and learn how to solve this type of problems once and for all.

Also,  you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this textbook under the topic "Projectiles launched/thrown and moving vertically up and dawn".


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Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.