Từ các chữ số 0.1,2,3,4,5 có thể lập được bao nhiêu số có 4 chữ số khác nhau

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?