Express the radical using the imaginary unit, iii.
Express your answer in simplified form.
\pm\sqrt{-25}=\pm±
−25

=±plus minus, square root of, minus, 25, end square root, equals, plus minus

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

That is right sorry i was gonna answer but i already saw his