Solve the problem.A reflecting telescope has a mirror shaped like a paraboloid of revolution. If the distance of the vertex to the focus is 25 feet and the distance across the top of the mirror is 54 inches, how deep is the mirror in the center?

A.  in.
B.  in.
C.  in.
D.  in.


Answer: D

Mathematics

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Write an equation that results in the indicated translation.The square root function, shifted 3 units to the right

A. y = 
B. y =  + 3
C. y = 
D. y =  - 3

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Tell which signed number corresponds to the situation.15-pound loss

A. -15 B. +15

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Simplify the expression.( - )( - )

A.  -  - 25 + 9
B. x - x - 5 + 3
C.  -  - 15 + 3
D.  -  - 5 + 3

Mathematics