Pemdas, so exponent before multiply
so do a^-1/2 then multiply it by 2
remember that
![x^ \frac{m}{n}= \sqrt[n]{x^m}](https://tex.z-dn.net/?f=x%5E%20%5Cfrac%7Bm%7D%7Bn%7D%3D%20%5Csqrt%5Bn%5D%7Bx%5Em%7D%20%20)
and

therefor,

the we multiply by 2
16 because two negatives numbers equal a possitive so 16
Answer:
the equation has infinitely amny solutions
500 centimeters I think *sweats nervously*
Answer:
sample 1: 75
sample 2: 86
Step-by-step explanation: