Abaker mixes a 21-pound batch of dough that contains 3 pounds of sugar. approximately how many pounds of sugar must be added for the dough to contain 27% sugar?
a. 2.7 b. 3.1 c. 3.6 d. 4.2

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Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet