Find the standard deviation. Round to one more place than the data.19.3, 20.4, 46.5, 45.8, 16.5, 24.5
A. 46.2
B. 4988.2
C. 5921.0
D. 13.66
Answer: D
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Solve the equation by factoring.5x(4x + 20) = 0
A. {0, 5}
B. {0, -5 , 5}
C. {0, -5}
D. 
Provide an appropriate response.Using the following diagram, prove that ?ADB ~ ?BDC.
What will be an ideal response?
State the name of the property illustrated.9(x + 7) = 9x + 9 ? 7
A. Distributive property of multiplication over addition B. Commutative property of multiplication C. Identity property of multiplication D. Associative property of multiplication
Use a graphing calculator to plot the data and find the quadratic function of best fit.A rock is dropped from a tall building and its distance (in feet) below the point of release is recorded as accurately as possible at various times after the moment of release. The results are shown in the table. Find the regression equation of the best model. 
A. y = -74.9 + 290 lnx B. y = - 148.4 + 112x C. y = 13.0 e0.686x D. y = 15.95x2