In the diagram above, O is the center if the two concentric circle of radii 13cm and 10cm respectively. Find the area of the shaded portion in the sector wi...

When an aeroplane is 800m above the ground, its angle of elevation from a point P on the ground is 30o. How far is the plane from P by line of sight?

Find the root of the equation 2x\(^2\) - 3x - 2 = 0

If log\(_{10}\) a = 4; what is a?

Simplify 0.63954 ÷ 0.003 giving your answer correct to two significant figures

If log\(_{10}\) q = 2.7078, what is q?

A student measured the length of a room and obtained the measurement of 3.99m. If the percentage error of is measurement was 5% and his own measurement was s...

What value of k makes the given expression a perfect square ? m\(^2\) - 8m + k = 0

Cos x is negative and sin x is negative.Which of the following is true of x?