Expected value,
E[X] =
= (1/2)*1 + (1/2)*3 = 0.5+1.5 = 2
E[X] =
6 divided by -2 ............
2 answers:
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Answer:
a & b. in 1 sec the object reaches a maximum height of 16 feet
c. 2 sec. the object will hit the ground
Step-by-step explanation:
h = -16 +32t.
When graphed, you would get a parabola that opens down. The vertex is the key to the problem. The vertex (t, h) will give you the maximum height and the time to reach that height.
So, t = -b/2a = -32/-16(2) = 1
h(1) = -16() + 32(1) = -16 + 32 = 16
Therefore, the vertex is (1, 16)
So, in 1 sec the object reaches a maximum height of 16 feet
let h = 0 for when the object hits the ground
-16 +32t = 0
-16t(t - 2) = 0
t = 0 or t = 2
After 2 sec. the object will hit the ground
Answer:
3490 decigram
Step-by-step explanation: