Answer: 174 - 5 = 169 square root of 169 is 13x3=39 = 5.57142857143
Step-by-step explanation:
Answer:
The mistake was minus sign before the 15 and putting 15x² instead of 15x³.
The correct answer is:

Is it 2 times x squared (2x^2?
2 * 6^2
2 * 36
72
Defined as the average of a set of numbers
The surface are of the shape is 251.5 units (sorry if that is wrong)