17 Select the correct answer from the drop-down menu.
Susan and Mark are standing at different places on a beach and watching a bird. The angles of elevation they make are 20° and 50°, respectively.
kilometers from the ground.
If Susan and Mark are 7 kilometers apart and the bird is between them, the bird is at a height of
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1.95
239
5.36
6.58
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the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

answer: the value of b is 24 + 3t / (4- t ) = b

solution:

step 1 : find the slope using the formula below with the c (t, 3) and d(4, -3)

m = y2-y1 / x2 - x1

m = -3 -3 / 4-t

m = -6/4-t

to find the value of   b use the equation given in the question

note : use any of the pair given c or d in the equation to find the value of b i will be using d ( 4, -3)

y = mx+ b

3 = (-6/4-t)(4) + b don't forget to take the lcm

b = (36 - 3 t ) / ( 4 - t )