PQRS is square. If x is the midpoint of PQ, Calculate correct to the nearest degree, <SPX
The angle of elevation of an aircraft from a point K on the horizontal ground 30\(\alpha\). If the aircraft is 800m above the ground, how far is it from K?
The population of students in a school is 810. If this is represented on a pie chart, calculate the sectoral angle for a class of 72 students
The scores of twenty students in a test are as follows: 44, 47, 48, 49, 50, 51, 52, 53, 53, 54, 58, 59, 60, 61, 63, 65, 67, 70, 73, 75. Find the third quartile.
| Score | 0 - 4 | 5 - 9 | 10 - 14 |
| Frequency | 2 | 1 | 2 |
The table shows the distribution of the scores of some students in a test. Calculate the mean scores.
