24% of 680 + 16 % of 525 – 22% of 450 =?

  is equal to:

If the square root of 841 is 29, then square root of 0.00000841 is equal to:

115% of 4880 – 85% of 1640 = ?

Find the conjugate of (1 + i) ³ 

158.25 x 4.6 + 21% of 847+?= 950.935045

Find the value of

 sin⁴30⁰ + cos⁴30⁰ – sin25⁰cos65⁰-sin65⁰cos25⁰