A construction working repairing a window tosses a tool to his partner across the street. The height of the tool above the ground is modelled by the quadratic function $h(t)=-5t^2+20t+25$, where $h(t)$ is in metres and $t$ is the time in seconds, after the toss. <br><br> QUESTION : Determine the domain and range of the function in this situation.

Question

$\begin{array}{1 1} (a)\;domain : \{ t \in R|0 \leq t \leq -15 \}\\ Range : \{h \in R |0 \leq h \leq 45\} \\ \\ (b)\;domain : \{ t \in R| -5\geq t \geq 0 \} \\ Range : \{h \in R |0 \leq h \leq 50\} \\ \\(c)\;domain : \{ t \in R|0 \leq t \leq 5 \} \\ Range : \{h \in R |0 \leq h \leq 45\} \\ \\ (d)\;domain : \{ t \in R|0 \leq t \leq 10 \} \\ Range : \{h \in R |0 \leq h \leq 45\} \end{array}$