Write the formula for the area A of any quadrilateral that has perpendicular diagonalsof lengths 
and 
.
What will be an ideal response?
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Solve the problem.The world population of a certain species is evaluated at 2.3 × 106. By some projections, this population will be 6 times more important in 30 years. Express the population at that time in scientific notation.
A. 138 × 106 B. 13.8 × 107 C. 1.38 × 109 D. 1.38 × 107
Subtract.13 - (-6)
A. 7 B. -7 C. 19 D. -19
Provide an appropriate response.Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient of x2 should be positive or negative. DENTAL FLOSS USE 
Years since 2000
A. Quadratic; positive B. Linear; negative C. Quadratic; negative D. Linear; positive
Find the center and the radius of the circle.x2 + y2 - 3x + 3y - 118 = 0
A. 
, r = 
B. 
, r = - 
, 
C. 
, r = 
D. 
, r = 