Question

Please help me with questions 16, 17, and 18

Answer 1

Problem 16

The answer is A) quadrant I

The reason why is because C has x coordinate of x = -3. Add 4 to this and it gets to x = 1. Since x > 0 and y > 0, this means C has moved to quadrant I which is the upper-right quadrant.

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Problem 17

Answer: B) 22 degrees

tan(angle) = opposite/adjacent
tan(C) = AB/BC
tan(C) = 2/5
tan(C) = 0.4
C = arctan(0.4)
C = 21.801
which rounds to 22 

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Problem 18

Answer: choice A) x/28 = 11/15

(length of tree's shadow)/(tree height) = (length of pole's shadow)/(pole height)
(x)/(28) = (11)/(15)
x/28 = 11/15