A Daredevil Jumps Off A Tall Building. He Falls Freely For Several Seconds Before Releasing His Parachute . His Height (h) In Meters , T Seconds After Jumping Can Be Modeled By : h=-4.9t^2+t+360 before he releases his parachute and h=-4t+142 After He Releases His Parachute . How Long After Jumping Did He Release His Parachute ? HELPP ME PLEASE !!!!

Question

A Daredevil  Jumps Off A Tall Building. He Falls Freely For Several Seconds Before Releasing His Parachute . His Height (h) In Meters , T Seconds After Jumping Can Be Modeled By : h=-4.9t^2+t+360 before he releases his parachute and h=-4t+142 After He Releases His Parachute . How Long After Jumping Did He Release His Parachute ? HELPP ME PLEASE !!!!

phi · Answer

both equations are true at the time he pulls his chute.
set them equal to each other. (i.e. both give the height "h" where he pulls his chute)

anonymous · Answer

CAN U DRAW AND SHOW ME IM VERY CONFUSED

phi · Answer

-4.9t^2+t+360 = -4t+142

anonymous · Answer

OK , And The Next Step What Do I Do ?