Question
What defines noise pollution according to the World
Health Organization (WHO)?Solution
The World Health Organization (WHO) defines noise above 65 decibels (dB) as noise pollution. To be precise, noise becomes harmful when it exceeds 75 decibels (dB) and is painful above 120 dB.
If P(A) = 0.7, P(B) = 0.5 and P (B/A) = 0.3, find (i) P(A/B) (ii) P(A ∪ B)?
The vertices of triangle ABC are A(1, 4), B(5, 2) and C(7, 8). Find the coordinates of the centroid and the length of median from A.
Determine the distance between the points (–3, 4) and (5, –2).
- What is the reflection of the point (8, -5) in the line y = 2?
Find coordinates of the point dividing the line joining (–3,2) and (5,8) internally in ratio 3:1.
Find the Perpendicular distance between two lines
6x + 8y = 18, 12x + 16y =20
Which of the following is NOT a known factor to uniquely determine a plane?
If points A(–2, 3) and B(4, –3) are ends of a diameter, find equation of the circle.
A line passes through the point (4, 3) and is perpendicular to the line 3x + 4y = 12. Find the equation of the new line.
