Answer:
B should be the answer but it could but C
Answer: The speed is 22.2 mi/hr and woman is 8° north relative to the surface of the water.
Step-by-step explanation:
Since we have given that
Speed at which woman walks due west = 3 mi/hr
Speed at which ship moving due north = 22 mi/hr
Now it forms "Pythagorus theorem":
So, it becomes,
![H^2=B^2+P^2\\\\H^2=3^2+22^2\\\\H^2=9+484\\\\H^2=493\\\\H=\sqrt{493}\\H=22.20\ mi/hr](https://tex.z-dn.net/?f=H%5E2%3DB%5E2%2BP%5E2%5C%5C%5C%5CH%5E2%3D3%5E2%2B22%5E2%5C%5C%5C%5CH%5E2%3D9%2B484%5C%5C%5C%5CH%5E2%3D493%5C%5C%5C%5CH%3D%5Csqrt%7B493%7D%5C%5CH%3D22.20%5C%20mi%2Fhr)
And the direction of the woman relative to the surface of the water is given by
![\theta=\sin^{-1}x(\dfrac{3}{22.2})=7.76\approx 8^\circ](https://tex.z-dn.net/?f=%5Ctheta%3D%5Csin%5E%7B-1%7Dx%28%5Cdfrac%7B3%7D%7B22.2%7D%29%3D7.76%5Capprox%208%5E%5Ccirc)
Hence, the speed is 22.2 mi/hr and woman is 8° north relative to the surface of the water.
X^2-9=-5
x^2-4=0
(x+2)(x-2)=0 [Difference of Two Squares]
x=-2,2
-2 is the smaller root.
Answer:
C ..................................