Lynn wants to predict how much fuel her car will use based on its speed. She drove her car 100\,\text{km}100km100, start text, k, m, end text at each of the speeds below, and she measured how much fuel was used at each speed. Her data is summarized in the table below. Speed (km/hour) 202020 404040 606060 808080 100100100 120120120 Fuel used (liters) 13.013.013, point, 0 8.08.08, point, 0 5.95.95, point, 9 7.07.07, point, 0 8.38.38, point, 3 9.99.99, point, 9

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.

Three friends are comparing the prices of various packages of golf balls at a sporting goods store. hector finds a package of 6 golf balls that costs $4.50.