There is no exact length of the curve x = √(y) - 4y from 1 to 4.
Answer:
4.02 meters.
Step-by-step explanation:
In the diagram, the length of the ladder is |AC|.
If the foot of the ladder is x meters from the base of the ladder
Then the distance of the ladder up the wall, AB=2x meters.
Using Pythagoras Theorem
![|AC|^2=|AB|^2+|BC|^2\\4.5^2=(2x)^2+x^2\\4.5^2=4x^2+x^2\\20.25=5x^2\\$Divide both sides by 5\\x^2=20.25\div 5\\x^2=4.05\\x=\sqrt{4.05}=2.01 feet](https://tex.z-dn.net/?f=%7CAC%7C%5E2%3D%7CAB%7C%5E2%2B%7CBC%7C%5E2%5C%5C4.5%5E2%3D%282x%29%5E2%2Bx%5E2%5C%5C4.5%5E2%3D4x%5E2%2Bx%5E2%5C%5C20.25%3D5x%5E2%5C%5C%24Divide%20both%20sides%20by%205%5C%5Cx%5E2%3D20.25%5Cdiv%205%5C%5Cx%5E2%3D4.05%5C%5Cx%3D%5Csqrt%7B4.05%7D%3D2.01%20feet)
Therefore, the distance of the ladder up the wall,
AB=2 X 2.01 =4.02 meters.
It's B, and being mental won' help when having a calculator next to you) It's B for sure!!!
- Answer: D.
Step-by-step explanation:
Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.
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