(a) If \( a \) is a zero of the polynomial \( P(x) \), then \( \square \) must be a factor of \( P(x) \)

At a marine park, three trained dolphins jump in unison over an arching stream of water whose path can be described by the equation \( y=-0.05 x^{2}+2 x \), Given the takeoff points for each dolphin, where \( a=10 \) feet, \( b=20 \) feet, and \( c=35 \) feet, how high must each jump to clear the stream of water? dolphin a dolphin b dolphin \( c \)

Graph: \( 5 x+4 y \leq 0 \)

\( \sqrt {\times -1=10} \)

\( x^{3}-2 x^{2}-x+4 \) for (a) \( x=2 \) (b) \( x=-2 \)

Parallel line that contains \( (6,5) \)