-4.75= z/2
Multiply both sides by 2
-4.75(2)= z/2(2)
Cross out 2 and 2, divide by 1 and becomes z
z=-9.5
Answer: z= -9.5
The margin of error given the proportion can be found using the formula

Where

is the z-score of the confidence level

is the sample proportion

is the sample size
We have



Plugging these values into the formula, we have:

The result 0.14 as percentage is 14%
Margin error is 38% ⁺/₋ 14%
Ah, the commutative property.
a + b = b + a
xy = yx
When using the commutative property - a good way to remember it is to think of a community, in which each community member helps one another to a mutual outcome.
Using the commutative property we can rearrange this equation into a more sensical format:
-8.9 + 6.7 - 1.1
6.7 - 1.1 - 8.9
6.7 - 1.1 = 5.6
5.6 - 8.9 = -3.3
With this given information that 8 filters = $39.92. What you can do is divide $39.92 by 8 and get the individual price of 1 filter. So, $39.92/8 = $4.99 (price of 1 filter). The question is asking for the cost of 6 filters so you can multiply $4.99 with 6 filters and get $29.94. The answer is $29.94 for 6 filters.