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## A . 11 = w 3 9 11 = 9 3 w 11 = w 12 6 11 = 9

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**A Scientist prepared a mixture that combined 11 milligrams**of a chemical with 3 liters of water. The chemist now wants to prepare a smaller amount of the same mixture using 9 milligrams of the chemical. Which proportion would help her determine w, the number of liters of water she should use? A . 11 = w 3 9 11 = 9 3 w 11 = w 12 6 11 = 9 14 w**The two rectangles are similar. What is the width of the**second rectangle? 12 ft 8 ft 7 ft X**Carrie is building a playhouse. She wants her playhouse to**be 10 ft wide and 22 ft long. If her scale model is 7 feet wide, how long is the scale model?