\left[x _{4}\right] = \left[ \frac{z}{2}+i \,\sqrt{\frac{1}{2}}\,\sqrt{\left( \frac{3\,z^{2}}{2}+\sqrt{2}\,\sqrt{z^{4}}\right) }\right][x4]=[2z+i√21√(23z2+√2√z4)] totally answer
For #3, it's 5.4 because you divide the total amount of money made by the amount of money earned per hour.
49.95/9.25=5.4 hours
The answer to this is C.17
