brianna kicks a football. its height in feet is given by $h(t)=-16t^{2}+80t$ where $t$ represents the time…

brianna kicks a football. its height in feet is given by $h(t)=-16t^{2}+80t$ where $t$ represents the time in seconds after kick. how many seconds have gone by when the football is at its highest point?

brianna kicks a football. its height in feet is given by $h(t)=-16t^{2}+80t$ where $t$ represents the time in seconds after kick. how many seconds have gone by when the football is at its highest point?

Answer

Explanation:

Step1: Identificar la función de altura

La función de altura es $h(t)=-16t^{2}+80t$, que es una función cuadrática de la forma $y = ax^{2}+bx + c$, donde $a=-16$, $b = 80$ y $c = 0$.

Step2: Usar la fórmula del eje de simetría

El eje de simetría de una función cuadrática $y=ax^{2}+bx + c$ está dado por $t=-\frac{b}{2a}$. Sustituyendo $a=-16$ y $b = 80$ en la fórmula: $t=-\frac{80}{2\times(-16)}$

Step3: Simplificar la expresión

$t=\frac{80}{32}=\frac{5}{2}=2.5$

Answer:

$2.5$