It is observed that \(1 + 3 = 2^2, 1 + 3 + 5 = 3^2, 1 + 3 + 5 + 7 = 4^2\).
If 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 = P\(^2\) find P
Evaluate \(3.0\times 10^1 - 2.8\times 10^{-1}\)leaving the answer in standard form
The side of a square is increased from 20cm to 21cm. Calculate the percentage increase in its area
