Write a formula to express the relationship. Use k as the constant of variation.The area of an equilateral triangle varies directly as the square of the side s.
A. A = 
B. A = k2s
C. A = 
D. A = ks2
Answer: D
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Graph the circle.x2 + 
2 = 
A. 
B. 
C. 
D. 
If y varies directly as x, find the direct variation equation for the situation.y = 0.8 when x = 6.4
A. y = 0.125x B. y = 0.8x C. y = 8x D. y = x - 5.6
The mean is sometimes called the arithmetic mean to distinguish it from other possible means. For example, a different mean, called the geometric mean (G.M.), is used in business and economics for finding average rates of change, average rates of growth, or average ratios. This mean is defined to be the nth root of the product of the numbers. For example, the geometric mean of the numbers 4, 5, and 6 is
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Find the arithmetic and geometric means for the numbers 2, 4, 6, 7, 7, 8 and 10.
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Round your answers to the nearest hundredth.
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A. 
B. 
C. ?
D. ?
E. ?
Write the form of the partial fraction decomposition of the rational expression.
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A. 
B. 
C. 
D. 
E. 