Factor the polynomial completely. If a polynomial cannot be factored, state that it is irreducible.98x4 - 50x2
A. 2x2(7x - 5)2
B. 2(7x2 + 5)(7x2 - 5)
C. irreducible
D. 2x2(7x + 5)(7x - 5)
Answer: D
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Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 2.1 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 4.41?t2 B. (A ? r)(t) = 4.2?t2 C. (A ? r)(t) = 2.1?t2 D. (A ? r)(t) = 4.41?2t
Graph.f(x) = 
x - 4
A. 
B. 
C. 
D. 
Find the exact value of the expression without using a calculator or table.arcsec (
)
A. 
B. 
± 2?n, 
± 2?n
C. 
D. 
Set the viewing rectangle of your graphing calculator to 
by 
to solve the problem.Find a set of parametric equations evaluated over 0 ? t ? 2? that produces the graph shown.
A.
| x1 = 4 + t/?, | y1 = 1 + t/? |
| x2 = 4 + t/?, | y2 = 1 |
| x3 = 4 + t/?, | y3 = 1 + 2t/? |
B.
| x1 = 4 + t/?, | y1 = 1 + t/? |
| x2 = 4 + t/?, | y2 = 1 |
| x3 = 4 + t/?, | y3 = 3 |
C.
| x1 = t/?, | y1 = t/? |
| x2 = t/?, | y2 = 0 |
| x3 = t/?, | y3 = 2 |
D.
| x1 = 4 + t/?, | y1 = 1 + t/? |
| x2 = 4 + t/?, | y2 = 1 + t/? |
| x3 = 4 + t/?, | y3 = 3 |