**Answer:**

81

**Step-by-step explanation:**

2x+6=84

2x=78

81

find your own way

Você pode, mas não receberá um bom número limpo. Eu recomendo que você faça divisão longa

**Answer:**

C

**Step-by-step explanation:**

3 x -2 = -6

C is the only option with 6 negative integer tiles

**Answer:**

415

**Step-by-step explanation:**

Confidence Level = 98%

Z-value for this confidence level = z = 2.326

Margin of error = E = 0.08

Mean = u = 6.6

Standard deviation =

Required Sample Size = n = ?

The formula for margin of error is:

Re-arranging the equation for n, and using the given values we get:

**Thus, the minimum sample size required to create the specified confidence interval is 415**