Question

h = -t2 + 4t + 6. Determine:

Answer 1

$Ola' \\ \\ H=-t\²+4t+6 \\ \\ H'=-2t+4~~--\ \textgreater \ H'=0 \\ \\ 0=-2t+4 \\ \\ \boxed{t=2s} \\ \\ Respondendo~a) \\ \boxed{\boxed{t=2s}} \\ \\ Respondendo~b) \\ H=-(2)\²+4(2)+6 \\ \boxed{\boxed{H=10m}} \\ \\ Respondendo~c) \\ Tempo~total= tempo ~de~subida~mais~temos~~ de~retorno \\ \\ t_t=2s+2s \\ \\ \boxed{\boxed{t_t=4s}}$

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