ĐỀ THI OLYMPIC TIẾNG ANH LỚP 10 NĂM HỌC 2012 VÒNG 8 – ĐỀ THI SỐ 1 Chọn câu trả lời tốt nhất cho những câu hỏi dưới đây. 1. Amanda wants to find her route on a map with this scale: 0.5 inch = 9 miles. Amanda measures her route on the map and finds that it is 6 inches. How long is her actual route? A. 108 miles B. 57 miles C. 11 miles D. 3 miles E. 13 miles 2. A weather forecaster is predicting a snowstorm. If a previous storm left 4 inches of snow on the ground and the new snow falls at a rate of 0.5 inch per hour, which function relates depth of snow, s, in inches, to time, t, in hours, after the new storm begins? A. s = 0.5(t + 4) B. s = 0.5t + 4 C. s = 4t + 0.5 D. s = 4(t + 0.5) E. s = 5(t + 4) 3. The graph shows the depth of water, y, at a harbor on the Atlantic Ocean as a function of time, measured in the number of hours, x, since the last low tide. Based on the graph, during which entire interval is the water level decreasing? A. between 1 and 4 hours B. between 4 and 7 hours C. between 7 and 10 hours D. between 10 and 13 hours E. between 19 and 20 hours 4. A student is preparing a chart to show the percent of athletes at school who play different fall sports. If each athlete plays only one sport, what is the most appropriate way to display this information? A. circle graph B. line graph C. scatterplot D. box-and-whisker plot E. None of them 5. Which expression is equivalent to 3x 2 × 2x 3 ? A. 5x 5 B. 5x 6 C. 6x 5 D. 6x 6 E. 7x 2 6. A fish tank in the shape of a rectangular prism has these dimensions: length = 20 inches, width =10 inches and height =12 inches. What is the volume of water in the tank when it is 0.8 full? A. 1,120 cu in. B. 1,920 cu in. C. 2,400 cu in. D. 3,000 cu in. E. 3,500 cu in. 7. A driver for a delivery service earns $9 per hour and is expected to deliver at least 12 packages a day. The driver earns an additional $2 for each package delivered beyond the required 12. Which equation can be solved to determine the number of packages, x, the driver must deliver to earn $100 in an 8-hour workday? A. 72 + 8(x – 12) = 100 B. 72 + 2(12 – x) = 100 C. 72 + 8(12 – x) = 100 D. 72 + 2(x – 12) = 100 E. 72 + 18(x – 2) = 100 8. A rhombus and a rectangle are shown above. Which property is true for the rhombus but not true for the rectangle? A. Opposite angles are congruent. B. Opposite angles are supplementary. C. Diagonals are congruent. D. Diagonals are perpendicular. E. None of them h = 200t – 16t 2 9. Instructions for a model rocket state that the height, h, of the rocket in feet above ground t seconds after launch is given by the equation above. How high above the ground is the rocket expected to be 2 seconds after launch? A. 136 feet B. 336 feet C. 368 feet D. 464 feet E. 736 feet 10. Which equation is equivalent to 4x − 1 = 13? A. 4x = 14 B. 4x = 12 C. x − 1 = 9 D. x − 1 = 17 E. x − 3 = 9