Maggie and Lucila are friends, and they each have one daughter. They decided to build life-size doll houses for each child. The length of Maggie's doll-house is 10 feet longer than the width. Lucila's doll house will be square. The sides of Lucila's doll house are equal to the width of Maggie's doll house. What is the ratio of the area of Maggie's doll house to the area of Lucila's doll house? After you find the ratio, use it to find the ratio of the areas if the width of Maggie's doll house is 14 feet.

For problems 7–10, state a reasonable domain for the problem statement, find the inverse function f –1(x), and identify the independent and dependent quantities of the inverse. 7. gary is jogging. the total distance he has traveled, in miles, can be estimated using the function f(x) = 9x, where x is his jogging time in hours. 8. camryn sells computers. she earns commission for her computer sales plus a fixed wage for each day she works. her daily earnings, in dollars, can be estimated using the function f(x) = 0.15x + 50, where x represents her computer sales in dollars. 9. the distance a motorboat travels, in meters, can be estimated using the equation f(x) = 1.9x2, wherexisthetimeinseconds,for0≤x≤10. 10. a rock band is selling tickets to a concert at a theater. the band earns money for each ticket sold, but has to pay some of the earnings to the theater. the total money earned by the band can be estimated using the function f(x) = 7.5x – 300, where x is the number of tickets sold.