Right triangle ABC has , , and

style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_333e2c0fffc14be180ed3b175" />. Use this information to find sin A.

?



A.
B. ?
C. ?
D. ?
E. ?

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Answer: C

Mathematics

Find the exact value of the expression.tan 345°

A.
B. 2 + 
C. -2 - 
D.

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 2.3 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) = 5.29?t2 B. (A ? r)(t) = 4.6?t2 C. (A ? r)(t) = 2.3?t2 D. (A ? r)(t) = 5.29?2t

Graph the equation and give the coordinates of the vertex.y = x2 - 2x + 8 

A. (1, -9)

B. (-1, 7)

C. (-1, 9)

D. (1, 7)

List the potential rational zeros of the polynomial function. Do not find the zeros.f(x) = x5 - 2x2 + 2x + 10

A. ± 1, ± 5, ± 2
B. ± 1, ± , ± , ± , ± 5, ± 2, ± 10
C. ± 1, ± , ± , ± 
D. ± 1, ± 5, ± 2, ± 10