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Question
on a family vacation at the beach, harold throws a beach ball upward as high as he can. when the ball reaches a height of 30 feet, it starts to fall back down. the balls height above the ground in feet can be modeled by the expression $30 - 16t^2$, where $t$ is the time in seconds after the ball starts to fall back down. what does the quantity $16t^2$ represent in the expression? the time in seconds it takes for the ball to fall $t$ feet the height in feet of the ball above the ground after $t$ seconds the distance in feet the ball has fallen after $t$ seconds the time in seconds it takes for the ball to reach a height of $t$ feet
Step1: Analizar la expresión del alto
La expresión para el alto del balón es \( 30 - 16t^2 \), donde 30 es el alto máximo alcanzado antes de caer.
Step2: Interpretar \( 16t^2 \)
Como el balón cae desde 30 pies, \( 16t^2 \) debe representar la distancia que ha caído después de \( t \) segundos, ya que se resta de la altura inicial para obtener la altura actual.
Step3: Evaluar las opciones
- Opción 1: \( 16t^2 \) no es tiempo, es distancia. Incorrecto.
- Opción 2: La altura total es \( 30 - 16t^2 \), no \( 16t^2 \). Incorrecto.
- Opción 3: Coincide con la interpretación de la distancia caída. Correcto.
- Opción 4: \( 16t^2 \) no es tiempo, es distancia. Incorrecto.
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the distance in feet the ball has fallen after t seconds