Find the area of the shaded part of the figure if a = 7, b = 10, c = 2.
?
?
A. 21
B. 140
C. 42
D. 84
E. none of these
Answer: C
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Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 8 days.
A. $448 B. $10,400 C. $104 D. $44,800
Solve.
+ 
= 
A. - 
B. 3
C. - 3
D. 
The foci F1 and F2, the vertices V1 and V2, and the endpoints U1 and U2 of the minor axis are as labeled in the figure. Graph the ellipse and find its standard equation. (The coordinates of V1, V2, U1, and U2 are integers, and the coordinates of F1 and F2 are given.)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find the axis of symmetry of the given function.f(x) = -2x2 + 13x + 1
A. x = - 
B. x = 
C. x = 
D. x = - 