Asked by Anonymous
back from break, need help again
The height , h, in feet, of a bottle rocket is modeled by:
where t is the time in seconds.
A. Factor the expression.
H = -16t^2 + 60t = 4t(-4t + 15)
B. What is the height of the rocket after 2 seconds?
When t = 2
H = 4t(-4 times 2 + 15) = 28
C. What is the height of the rocket after 3.75 seconds? Explain the solution.
When t = 3.75
H = 4t(-4 times 3.75 + 15) = 0?
(when I try to calculate this I get 0 and that can't be right, I'm doing something completely wrong I think)
The height , h, in feet, of a bottle rocket is modeled by:
where t is the time in seconds.
A. Factor the expression.
H = -16t^2 + 60t = 4t(-4t + 15)
B. What is the height of the rocket after 2 seconds?
When t = 2
H = 4t(-4 times 2 + 15) = 28
C. What is the height of the rocket after 3.75 seconds? Explain the solution.
When t = 3.75
H = 4t(-4 times 3.75 + 15) = 0?
(when I try to calculate this I get 0 and that can't be right, I'm doing something completely wrong I think)
Answers
Answered by
Anonymous
Forgot to post the Modeled by part: h = -16t^2 + 60t
Answered by
Scott
B. calculation error
C. zero is correct
... the rocket has to come back down at some point
C. zero is correct
... the rocket has to come back down at some point
Answered by
Anonymous
What was the error in my calculation on B?
Answered by
Scott
it's fairly obvious ... troubleshoot it ...