KA-0163●●○4 points, difficulty 2 of 34 ptLevel 9–10not yet calibratedA club has 8 members. In how many ways can a group of 3 be chosen to attend a conference, if the three places are all the same?CNT-06Selections of a few objectsalso CNT-16, CFT-01
KA-0164●●○4 points, difficulty 2 of 34 ptLevel 9–10not yet calibratedTwo triangles are similar. The sides of the smaller are 3/5 as long as the matching sides of the larger. The smaller triangle has area 18 square cm. What is the area of the larger triangle?GEO-16Scaling and similar figuresalso NUM-11, CFT-11
KA-0165●●○4 points, difficulty 2 of 34 ptLevel 9–10not yet calibratedFour litres of a solution that is 25 percent acid are mixed with six litres of a solution that is 50 percent acid. What percentage of the mixture is acid?MOD-08Mixtures and weighted averagesalso NUM-10, CFT-10