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SAT
>>
Math
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Quadratic Equations
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Q)
A water is catapulted into the air from the top of a building. The height
h
(
t
)
in meter of the ballon after
′
t
′
seconds is
h
(
t
)
=
−
5
t
2
+
30
t
+
10
<br> <br> QUESTION : What are the range of this function ?
(
a
)
{
h
(
t
)
∈
R
/
0
≤
h
(
t
)
<
55
}
(
b
)
{
h
(
t
)
∈
R
/
0
<
h
(
t
)
<
55
}
(
c
)
{
h
(
t
)
∈
R
/
0
≤
h
(
t
)
≤
55
}
(
d
)
{
h
(
t
)
∈
R
/
0
≥
h
(
t
)
≥
55
}
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