Answer:
The answer is 66.5
Step-by-step explanation:
To get the mean, you add all the numbers together, then you divide by the # of numbers their are. So you add 34,56,78,98, and then you divide by 4.
Answer: 
Step-by-step explanation:
By the negative exponent rule, you have that:

By the exponents properties, you know that:

Therefore, you can rewrite the left side of the equation has following:

Descompose 32 and 8 into its prime factors:

Rewrite:

Then:

As the base are equal, then:

Solve for x:

X^3 / X^5 = X^ -2
you have to subtract the exponents when you’re dividing
This is my answer. 0 < x < 0,5