A student found the approximate value of 0.02548 correct to two places of decimal instead of two significant figures. Find the percentage error.

Solve me equation: 2/3 (x + 5) = 1/4(5x - 3)

A and B are two sets. The number of elements in A∪B is 49, the number in A is 22 and number in B is 34. How many elements are in A ∩ E?

Simplify log39 + log315 - log35

Make q the subject of the relation t = √pq/r - r2

Which of the following equations has its roots as 4 and -5?

If P = {3, 5, 6} and Q = {4, 5, 6} then P∩Q equals

Express (0.0425 / 2.5) as a fraction

Solve the equations: 4x -y = 11; 5x + 2y = 4.