Need help with #17 and #18 please. ? Secure | https://www.webassign.net/web/Stud

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Need help with #17 and #18 please.

? Secure | https://www.webassign.net/web/Student/Assignment-Responses/submit?dep:18549794#018 17. 0/0.4 points Previous Answers SAlgTrig4 9.1.041 My Notes Ask Your Teach Find the horizontal and vertical components of the vector with the given length and direction, and write the vector in terms of the vectors i and j lvl 20, ? = 30° 18. 0.2/0.4 points | Previous Answers SAlgTrig4 9.1.050. My Notes Ask Your Teach Find the magnitude and direction (in degrees) of the vector. (Assume 0° ? 360°. Round the direction to two decimal places.) v (16, 12) Ivi =| 20 323.131 19. 0.4/0.4 points | Previous Answers SAlgTrig4 9.1.056 My Notes Ask Your Teach A river flows due south at 1.6 mi/h. In what direction should the swimmer head, at a velocity of 4 mi/h, in order to arrive at a landing point due east of his starting point? (Round your answer to one decimal p N 66.4 lace.) 641 PM O Type here to search 4/25/2018

Explanation / Answer

|v| = 20

theta = 30

horizontal component = v cos 30

20 cos 30 = 10 sqrt 3

vertical component = 20 sin 30 = 10

v = 10 sqrt 3 i + 10 j

2) v = < 16 , 12 >

magnitude = sqrt ( 16^2 + 12^2 )

= 20

angle = tan^-1 ( 12/16 )

angle = 36.87 degrees

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