Hmwk096-8-4 - Math 096 Homework NAME Section 8.4 1 9 11 13...

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Homework NAME____________________________ Cotter Section 8.4 : # 1, 9, 11, 13, 21, 23, 35, 39, 45, 47, 49, 51, 53 If y varies directly as x, find the constant of variation and the variation equation. 1. y = 4 when x = 20. k = __________________ Equation: _________________________ 9. The weight of a synthetic ball varies directly with the cube of its radius. A ball with a radius of two inches weighs 1.20 pounds. Find the weight of a ball of the same material with a 3-inch radius. weight = _____________________ If y varies inversely as x, find the constant of variation and the variation equation. 13. y = 6 when x = 5. k = __________________ Equation: _________________________ 23. If the voltage in an electrical circuit is held constant, the current I is inversely proportional to the resistance R . If the current is 40 amps when the resistance is 270 ohms, find the current when the resistance is 150 ohms. I
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Hmwk096-8-4 - Math 096 Homework NAME Section 8.4 1 9 11 13...

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