Find the value of \(64^\frac{1}{2}\).

Find the lowest common multiple of 72 and 60.

Find the highest common factor of 72 and 60.

Find the equation of the line that passes through the point \((0, 3)\) and is perpendicular to the line with equation \(y = -\frac{1}{2}x + 1\). Give your answer in the form y=mx+c

Calculate 23 × 54.

Write \(3.4 \times 10^7\) as a normal number.

Given that f(\(x\)) = \(2x - 1\) and g(\(x\)) = \(x^2\), find gf(2).

Calculate 0.24 ÷ 0.8.

\(a\) is inversely proportional to \(b\) and when \(a\) = 7, \(b\) = 10. Find the value of \(a\) when \(b\) = 5.