From a point on the floor the angle of elevation to the top of a door is 48º, while the angle of elevation to the ceiling above the door is 62º. If the ceiling is 12 feet above the floor, what is the vertical dimension of the door (see the figure)? Apply the rules regarding the use of significant digits when determining your answer.
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Vertical dimension of door = __________ ft
Fill in the blank(s) with the appropriate word(s).
7.1
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Find the GCF of 40, 45, and 50.
A. 10 B. 8 C. 1 D. 5
Use the rules of exponents to simplify the expression. Use positive exponents to write the answer.
-4
A. 
B. 
C. 
D. 
Factor completely. If the polynomial cannot be factored, write "prime."125x12 + 8y9
A. (5x4 + 2y3)(25x8 + 10x4y3 + 4y6) B. (5x4 - 2y3)( 5x4 + 2y3) C. (5x4 + 2y3)(25x8 - 10x4y3 + 4y6) D. (5x4 - 2y3)(25x2 + 10x4y3 + 4y6b2)
Solve the problem.The area of a triangle is given by the trinomial 
square inches. Find algebraic expressions for the base and height of the triangle. (Hint: Factor out 
as a common factor.)
A. (x + 14) and (x + 8) inches B. (x - 7) and (x - 8) inches C. (x - 14) and (x + 4) inches D. (x + 7) and (x + 4) inches