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serious [3.7K]
3 years ago
10

Lin parachutes from a plane at a height of 22,000 ft above sea level. Several minutes later, she notes from an instrument on her

wrist that she had dropped 10,000 ft. How far above sea level is she now?
10,000 ft

6000 ft


12,000 ft


–12,000 ft
Mathematics
1 answer:
romanna [79]3 years ago
5 0
12,000 feet above sea level
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Step 1:

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\begin{gathered} p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ =\text{ -15.64}\times0.52^2\text{ - 1.23}\times0.52\text{ + 5.23} \\ =\text{ -4.23 - 0.64 + 5.23} \\ =\text{ 0.36} \end{gathered}

d) 0.30 is more likely to be relaible.

e)

\begin{gathered} p(t)\text{ = 1} \\ p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ 1=-15.64t^2\text{ - 1.23t + 5.23} \\ -15.64t^2\text{ - 1.23t + 4.23 = 0} \\ t\text{ = 0.48222} \\ \text{t = 0.48 seconds} \end{gathered}

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