Simplify the expression 2[13-1)^2/2]
1 answer:
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Answer:
The object hits the ground in 5 seconds.
Step-by-step explanation:
Given : An object is launched at 9.8 meters per second from 73.5 meter tall platform. The objects height s (in meters) after t seconds I’d given by the equation .
To find : Use the factoring to determine when the object hits the ground ?
Solution :
When the object hits the ground the distance is zero.
i.e. s(t)=0
So,
Applying quadratic formula,
Here, a=-4.9, b=-9.8 and c=73.5
Reject t=-3
Therefore, the object hits the ground in 5 seconds.