Solve the problem.A ladder x feet long leans against a house and makes an angle ? with the horizontal. The base of the ladder is 11 feet from the house. Then 
Use a reciprocal identity to rewrite this formula.
A. 
B. 11 sin ?
C. 
D. 11 sec ?
Answer: D
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Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 + 4x
A. vertex (2, 4)
intercepts (0, 0), (4, 0)
B. vertex (-2, 4)
intercepts (0, 0), (- 4, 0)
C. vertex (2, -4)
intercept (0, -8)
D. vertex (-2, -4)
intercept (0, -8)
Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = 
A. 
B. 
C. 
D. 
Solve the problem.The following scatter diagram shows heights (in inches) of children and their ages.Height (inches)
Age (years)What happens to height as age increases?
A. Height stays the same as age increases. B. Height and age do not appear to be related. C. Height decreases as age increases. D. Height increases as age increases.
Consider the following statement: For all integers n, if n^3 is odd then n is odd.
(a) Prove the statement either by contradiction or by contraposition. Clearly indicate which method you are using. (b) If you used proof by contradiction in part (a), write what you would “suppose” and what you would “show” to prove the statement by contraposition. If you used proof by contraposition in part (a), write what you would “suppose” and what you would “show” to prove the statement by contradiction.