Solve the problem.When sitting atop a tree and looking down at his pal Joey, the angle of depression of Mack's line of sight is 
If Joey is known to be standing 20 feet from the base of the tree, how tall is the tree (to the nearest foot)?
A. 21 ft
B. 19 ft
C. 17 ft
D. 15 ft
Answer: D
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Solve the system of equations by the substitution method.
A. (0, 9) B. infinite number of solutions C. (5, -6) D. no solution
Provide an appropriate response.Suppose that A and B are two matrices such that A + B, A - B, and AB all exist. What can you conclude about the dimensions of A and B?
A. A and B are square matrices of the same dimension. B. There are no dimensions of A and B that would make this possible. C. A is a row matrix and B is a column matrix. D. A and B have the same dimension, but are not necessarily square matrices.
If 
bisects 
of 
, then point D must be the midpoint of 
.
Answer the following statement true (T) or false (F)
Find the zeros of the function.f(x) = 4x2 - 20x + 24
A. 0, 2, 3 B. 4, 2, 3 C. -2, -3 D. 2, 3