Answer:
aquatic environment is best fit
She got 215....but if she would have gotten 10 more, she would have scored 60% of the total marks......so if she got (215 + 10) = 225 she would have scored 60% of the total marks...
so 60% of the total marks = 225
0.60x = 225
x = 225/0.60
x = 375 <===
Since all the inside angles are 60, in order to add up to 180, the outside angles need to be 120.
The fourth root? There is no simplifying to be done.
The only way to continue work on this is converting to decimal. To four places the answer is 3.3437.
If you meant to ask for the cube root, the answer is 5.