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# Help. ​

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6
+2072

Help.

NotSoSmart  Nov 1, 2017
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#1
+84129
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For the first one.....here's a hint......expand each answer.....see if the second one leads you to

y = x^2  + 4x  -  3

CPhill  Nov 1, 2017
#2
+2072
+1

Is it the second choice

NotSoSmart  Nov 1, 2017
#4
+84129
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Correct  !!!!!

CPhill  Nov 1, 2017
#3
+84129
+1

For the  second one.....I'll use a graph  [ although I can also solve it algebraically, if you want me to ]

Look at the graph, here.....

https://www.desmos.com/calculator/sic40iw0e7

The height of the arch is ≈ 381 ft   and  the length of the bridge above the arch is ≈ 1791 ft

CPhill  Nov 1, 2017
edited by CPhill  Nov 1, 2017
#5
+2072
0

so that would be the last answer choice

NotSoSmart  Nov 1, 2017
#6
+84129
0

Yep...last choice.....

CPhill  Nov 1, 2017

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