Solve the problem.Find the missing length in the following right triangle. If necessary, round to the nearest tenth. 
A. 40 mi
B. 20 mi
C. 6.3 mi
D. 10 mi
Answer: C
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Solve the problem.Within an area code, phone numbers consist of 7 numbers. If none of the first three numbers can be 0 or 1, how many different phone numbers are possible within an area code?
A. 2,097,152 B. 100,000 C. 10,000,000 D. 5,120,000
Evaluate.
3
A. 
B. - 
C. 
D. - 
Find the standard form of the equation of the ellipse satisfying the given conditions.Foci: (-2, 0), (2, 0); x-intercepts: -5 and 5
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Factor the polynomial f(x). Then solve the equation f(x) = 0.f(x) = x4 - 4x3 - 7x2 + 22x + 24
A. (x + 2)(x + 3)(x + 1)(x - 4); -2, -3, -1, 4 B. (x - 2)(x - 3)(x + 1)(x - 4); 2, 3, -1, 4 C. (x - 2)(x - 3)(x - 1)(x - 4); 2, 3, 1, 4 D. (x + 2)(x - 3)(x + 1)(x - 4); -2, 3, -1, 4