84 in I believe? (Im sorry im not much help)
Answer:
Step-by-step explanation:

Product of a number and its multiplicative inverse should be equal to 1.
So,

Answer:
0.4
Step-by-step explanation:
I'm going to make some assumptions here:
That your sqrt8x= sqrt4+2x means √(8x) = √(4+2x). (There are other interpretations.)
Squaring both sides, 8x = 4 + 2x, or 6x = 4, or x = 4/6, or x = 2/3.
Answer:
513.24132
Step-by-step explanation:
None of the numbers are large enough to make the next number higher. Therefore that would just be your answer.