Answer:
At the time of launch height of the object was 60 meters.
Step-by-step explanation:
An object was launched from a platform and its height was modeled by the function,
h(x) = -5x² + 20x + 60
Where x = time or duration after the launch
At the time of launch, x = 0
So, by putting x = 0 in this equation,
h(0) = -5×(0) + 20×(0) + 60
h(0) = 60
Therefore, at the time of launch height of the object was 60 meters.
The inequality:
48 < 6 n
6 n > 48
n > 48 : 6
n > 8
Answer: n = { 9, 10, 11 } ( 3 values )
We can prove this: 48 < 6*9 or 48 < 54, 48 < 60, 48 < 66
I did the calculations of A(t)=50(0.8)5
and i got 200 for the 50*0.8*5
and the A(t) is 1,000
Hope i could help :D
