SOLUTION: Mark launched a model rocket with an initial speed of 180 ft per second. After how many seconds will Mark's rocket reach a height of 464 ft?
a) The formula h=rt-16t^2 gives the h
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-> SOLUTION: Mark launched a model rocket with an initial speed of 180 ft per second. After how many seconds will Mark's rocket reach a height of 464 ft?
a) The formula h=rt-16t^2 gives the h
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Question 63909This question is from textbook Algebra 1
: Mark launched a model rocket with an initial speed of 180 ft per second. After how many seconds will Mark's rocket reach a height of 464 ft?
a) The formula h=rt-16t^2 gives the height of an object projected upward at a rate of r feet per second after t seconds. Rewrite this equation substituting the data you are given.
b) Solve the equation and answer the problem.
c) After how many seconds will it be at that height again?
THANK YOU!!!!!! This question is from textbook Algebra 1
You can put this solution on YOUR website! Mark launched a model rocket with an initial speed of 180 ft per second. After how many seconds will Mark's rocket reach a height of 464 ft?
a) The formula h=rt-16t^2 gives the height of an object projected upward at a rate of r feet per second after t seconds...NO IT IS WRONG ..R IS THE INITIAL VELOCITY AND NOT VELOCITY AT TIME T.. Rewrite this equation substituting the data you are given.
AT T=0,U=INITIAL SPEED = 180 FPS = R...AT H=464...T=?...SUBSTITUTING
464=180T-16T^2
4T^2-45T+116=0
4T^2-16T-29T+116=0
4T(T-4)-29(T-4)=0
(T-4)(4T-29)=0
T=4....OR......29/4
THAT IS 4 SECS AFTER START ON ITS UPWARD JOURNEY
AND 29/4 SECS AFTER START ON ITS DOWNWARD JOURNEY.
b) Solve the equation and answer the problem.
c) After how many seconds will it be at that height again?
THANK YOU!!!!!!
