Simplify.-171 ÷ (-9)
A. 19
B. 9
C. -19
D. 
Answer: A
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Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 5 years? (Round to the nearest acre.)
A. 5452 acres B. 4921 acres C. 6386 acres D. 12,554 acres
The function f is one-to-one. Find its inverse.f(x) = 3x + 5
A. f-1(x) = 
B. f-1(x) = 
+ 5
C. f-1(x) = 
- 5
D. f-1(x) = 
Two sides of a right triangle ABC (C is the right angle) are given. Find the indicated trigonometric function of the given angle. Give exact answers with rational denominators.Find cos A when a = 
and c = 13.
A. 
B. 
C. 
D. 
Factor the expression.x(5x + 5)2(x2 - 2)-1/2 + 4(x2 - 2)1/2(5x + 5)
A. (5x + 5)(x2 - 2)-1/2(4x2 + 5x - 3) B. (5x + 5)2(x2 - 2)-1/2(4x2 + x - 8) C. (5x + 5)(x2 - 2)1/2(9x2 + 5x - 8) D. (5x + 5)(x2 - 2)-1/2(9x2 + 5x - 8)