Determine where the function is increasing and where it is decreasing.f(x) = -x2 + 6x
A. increasing on (-3, ?)
decreasing on (-?, -3)
B. increasing on (3, ?)
decreasing on (-?, 3)
C. increasing on (-?, -3)
decreasing on (-3, ?)
D. increasing on (-?, 3)
decreasing on (3, ?)
Answer: D
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Solve the problem.The area A = ?r2 of a circular oil spill changes with the radius. To the nearest tenth of a square foot, how much does the area increase when the radius changes from 5 ft to 5.1 ft?
A. 31.4 ft2 B. 2.0 ft2 C. 3.1 ft2 D. 15.7 ft2
Solve the problem.The velocity v = ds/dt and initial position of a body moving along a coordinate line are given below. Find the body's position at time t. v = 
, t > -6, s(-5) = 2
A. s = - 
B. s = ln 
+ 1
C. s = - 
+ 3
D. s = ln 
+ 2
Solve the radical equation, and check all proposed solutions.
- 
= 1
A. {-1, 3} B. {3} C. ? D. {-3, -1}
Write the polynomial as the product of linear and quadratic factors that are irreducible over the reals. ? f(x) = x4 + 42x2 - 343 ?
A. 
B. 
C. 
D. 
E. 