Answer the question.A nearby playground has a sandbox. Erica stretches string out to show the diagonals of the sandbox. The diagonals are perpendicular and they bisect each other. Is the sandbox a square?
What will be an ideal response?
Not necessarily. It could be a rhombus. It is only a square if the diagonals are also congruent.
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Provide an appropriate response.Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation. 
+ 
+ 
+ . . . + 
A. 
B. 
C. 
D. 
Use the formula for the sum of the first n terms of an arithmetic sequence to find the indicated sum.
A. 2100 B. 2247 C. 1890 D. 1932
Simplify. Express answers with positive exponents only.(-7z-2)-2
A. 
B. 49z4
C. -49z4
D. - 
A cone sliced by a plane results in a type of curve called a conic section. Use the given information and figure to identify the conic section produced in the plane. The plane is parallel to the side of the cone. 
A. ellipse B. hyperbola C. parabola D. circle