?Which of the following is true about similar polygons?

A. ?If a and a', b and b', c and c', etc. are corresponding sides, then ak = a', bk = b', ck = c', etc.
B. ?If the polygons are similar, then the perimeter of one polygon is kP, where k is the constant of proportionality and P is the perimeter of one polygon.
C. ?If the polygons are similar, then the perimeter of one polygon is knP, where k is the constant of proportionality, P is the perimeter of one polygon, and n is the number of sides of the polygon. 
D. ?a and b are true.
E. ?a and c are true.

Answer: D

Mathematics

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Solve the problem.The revenue achieved by selling x graphing calculators is figured to be  The cost of each calculator is  How many graphing calculators must be sold to make a profit (revenue - cost) of at least $312.80?

A. {x ? 14 < x < 26} B. {x ? 36 < x < 44} C. {x ? 34 < x < 46} D. {x ? 35 < x < 33}

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Graph the function by starting with a function from the library of functions and then using the techniques of shifting, compressing, stretching, and/or reflecting.g(x) =  - 4

A.

B.

C.

D.

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What percent of the total population is found between the mean and the z-score?

Standard Normal Distribution; z-scores  z      0.00      0.01     0.02      0.03     0.04      0.05     0.06      0.07     0.08      0.090.0    0.0000  0.0040  0.0080  0.0120  0.0160  0.0199  0.0239  0.0279  0.0319  0.03590.1    0.0398  0.0438  0.0478  0.0517  0.0557  0.0596  0.0636  0.0675  0.0714  0.07530.2    0.0793  0.0832  0.0871  0.0910  0.0948  0.0987  0.1026  0.1064  0.1103  0.11410.3    0.1179  0.1217  0.1255  0.1293  0.1331  0.1368  0.1406  0.1443  0.1480  0.15170.4    0.1554  0.1591  0.1628  0.1664  0.1700  0.1736  0.1772  0.1808  0.1844  0.18790.5    0.1915  0.1950  0.1985  0.2019  0.2054  0.2088  0.2123  0.2157  0.2190  0.22240.6    0.2257  0.2291  0.2324  0.2357  0.2389  0.2422  0.2454  0.2486  0.2517  0.25490.7    0.2580  0.2611  0.2642  0.2673  0.2704  0.2734  0.2764  0.2794  0.2823  0.28520.8    0.2881  0.2910  0.2939  0.2967  0.2995  0.3023  0.3051  0.3078  0.3106  0.31330.9    0.3159  0.3186  0.3212  0.3238  0.3264  0.3289  0.3315  0.3340  0.3365  0.33891.0    0.3413  0.3438  0.3461  0.3485  0.3508  0.3531  0.3554  0.3577  0.3599  0.3621? A. 17.17% B. 22.17% C. 12.17% D. 11.79% E. 27.17%

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Mathematics

Find the partial fraction decomposition. =  +  + 

A. A = 0, B = , C = 0, D = - 
B. A = 0, B = - , C = 0, D = 
C. A = , B = 0, C = - , D = 0
D. A = - , B = 0, C = , D = 0

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Mathematics