No no dont take any bad decisions god know what to do there is a bright future in front of u
<h3>
Answer: 0.1319</h3>
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Work Shown:

Side note: you can use the nCr formula to compute
; however, it's much quicker to use the shortcut formula
. You can also use Pascal's Triangle to find the value of 
Answer: 5 Seconds
Step-by-step explanation: Given the equation of the height expressed ad;
h(t) = - 16t^2 + initial height
Given that initial height = 400feet
h(t) = - 16t^2 + 400
The waste will hit the ground at when h(t) = 0
substitute
0 = - 16t^2 + 400
16t^2 = 400
t² = 400/16
t² = 25
t = √25
t = 5secs
You do 18.6 ÷ 3 and that equals 6.2