The mean heights of 3 groups of students consisting of 20, 16 and 14 students are 1.67m, 1.50m and 1.40m Respectively. What is the mean height of all the st...

What is the volume of a cube if the diagonal of one of the sides is \(\sqrt{50}\)cm?

Evaluate 1.25 × 10\(^2\) × 0.125 × 10\(^3\) × 12.5 × 10\(^{-4}\) leaving your answer in standard form

Given that the universal set U={14,15,16,17,18,19,20}, J ={16,19,20} and K= {14,15,18}, find (J' ∩ K')1.

If , sT = \(\sqrt{\frac{[(a + T)T]}{a}}\) what does T equal?

What is the total surface area of a cuboid whose dimensions are 12cm × 8cm × 3cm?

A cone was developed from a sector of a circle with radius10cm and an angle at the centre of 108°. What is the radius of the cone?

If sin 30° = 0.5, what is the cosine of its complement?

A petrol attendant recorded the number of vehicles that bought petrol from him for -3 hours and recorded 12 cars and 27 buses. What is the probability that t...