Answer:
1.Javier did not write the coefficient raised to power of 3
2.Javier wrote x^4 instead of x^3
3.Javier did divide exponents instead of subtraction of exponents
The closest squares greater and smaller than 67 are 64 and 81.
64<67<81
√64<√67<√81
8<√67<9
√67 is in between 8 and 9, so A is the answer.
Hope this helps!
Simplified answer: -x-123
circumference equals 40.84