Q:

La altura h sobre el nivel del suelo (en pies) de un cohete de juguete, t segundos después de ser lanzado, está dada por h = -16t2 + 120t. ¿Cuándo estará el cohete a 180 pies sobre el suelo?

Accepted Solution

A:
Answer:The solutions aret=2.07 sec  and t=5.43 secStep-by-step explanation:The question in EnglishThe height h above ground level (in feet) of a toy rocket, t seconds after it is launched, is given by h = -16t2 + 120t. When will the rocket be 180 feet above the ground?we have[tex]h=-16t^{2}+120t[/tex] -----> equation A[tex]h=180[/tex] -----> equation Bequate the equation A and equation B[tex]180=-16t^{2}+120t[/tex] ------> equation Cwe know thatThe solution of the equation C is equal to the x-coordinate of the intersection point of the graph equation A and the graph of the equation Bsousing a graphing toolThe solutions aret=2.07 sec  and t=5.43 secsee the attached figure to better understand the problem