SOLUTION: NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t)= -4.9t² + 46t + 213. Assuming that the rocket will splash

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Question 1167945: NASA launches a rocket at t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t)= -4.9t² + 46t + 213.
Assuming that the rocket will splash down into the ocean, at what time does splashdown occur?
The rocket splashes down after ? seconds.
How high above sea-level does the rocket get at its peak?
The rocket peaks at ? meters above sea-level.
Answer by ikleyn(53937) About Me  (Show Source):
You can put this solution on YOUR website!
.

In this site,  there is a bunch of lessons on a projectile thrown/shot/launched vertically up
    - Introductory lesson on a projectile thrown-shot-launched vertically up
    - 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

Consider these lessons as your textbook,  handbook,  guide,  tutorials,  templates 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".


Save the link to this online textbook together with its description

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.