\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Courses
About
Login
Register
C
⌫
\(\pi\)
e
\(\frac{a}{b}\)
!
←
→
(
)
\(\sqrt{\,}\)
\(a^{b}\)
7
8
9
\(\div\)
log
ln
4
5
6
\(\times\)
cos
cos⁻¹
1
2
3
-
sin
sin⁻¹
0
.
=
+
tan
tan⁻¹
A stone is thrown into the air. Its height above the ground is given by the function$$h(t) = -5t^{2} + 30t + 2 \text{ metres,}$$where \( t \) is the time in seconds from when the stone is thrown.
How high is the stone above the ground after 3 seconds?
7
8
9
+
4
5
6
-
1
2
3
*
C
0
.
÷
m
From what height above the ground was the stone released?
7
8
9
+
4
5
6
-
1
2
3
*
C
0
.
÷
m
At what times is the stone 27 m above the ground? (order from lowest to highest)
7
8
9
+
4
5
6
-
1
2
3
*
C
0
.
÷
s,
7
8
9
+
4
5
6
-
1
2
3
*
C
0
.
÷
s
Exit