Use the definite integral to find the area between the x-axis and the graph of f(x) over the indicated interval.f(x) = -x2 + 9; [0, 5]
A. 
B. 
C. 
D. 
Answer: C
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Simplify the expression.(x7)9 ? (x5)3
A. x156 B. x62 C. x78 D. x128
Solve the problem.A woman invested $2000 at 7% (or 0.07) for 8 years. How much did she have in her account at the end of 8 years? 
A. $112 B. $3120 C. $1120 D. $2240
Write an algebraic expression for each quantity using the given variable.The second angle of a triangle is triple the first. The third angle of the triangle is 
smaller than the first. Use the letter x.
A. x = first angle; 3x = second angle; x + 38 = third angle B. x = first angle; 3x = second angle; 38 - x = third angle C. x = first angle; 3x = second angle; x - 38 = third angle D. x = first angle; x - 38 = second angle; 3x = third angle
Find the product of the given binomial and its conjugate.
- y
A. x + y2
B. x -2y
C. x - y2
D. x - 2y
+ y2