Select the standard form of the equation of the parabola and determine the coordinates of the focus.
?
?
?

A. ; Focus: 
B. ; Focus: 
C. ; Focus: 
D. Focus: 
E. ; Focus: 

Answer: B

Mathematics

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Provide an appropriate response.A sequence of rational numbers {rn} is defined by r1 = , and if  then   Find   Hint: Compute the square of several terms of the sequence on a calculator.

A.  
B.
C.
D. 2

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Provide an appropriate response.Suppose that a data set has a left-skewed distribution. Which do you think will be larger, the mean or the mode? Explain your thinking.

What will be an ideal response?

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Using a sum or difference identity, write the following as an expression involving functions of ?.sin (? + 2?)

A. -cos ?
B.  cos ? -  sin ?
C.  cos ? +  sin ?
D. sin ?

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Solve the problem.The cost C of producing t units is given by C(t) = 2t2 + 7t, and the revenue R generated from selling t units is given by  For what values of t will there be a profit?

A. t > 6 B. t > 8 C. t > 0 D. t > 7

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Mathematics