heres a video link
https://virtualnerd.com/algebra-1/linear-equation-analysis/slope-rate-of-change/understanding-slope/rate-of-change-two-points-table
Answer: B is the answer
Step-by-step explanation:
Answer:
a. 385
b. 342
Step-by-step explanation:
To solve the problem we do the following:
The equation to calculate the sample size is:

a)
We have the following data:
Since no estimate of proportion is given, we will assume: p = q = 0.5
We know that For 95% confidence, z = 1.96
Width = 0.10
Hence, the margin of error would be:
0.10 / 2 = 0.05
E = 0.05
And so we can calculate sample size:

n = 385
b)
We have the following data for this point:
p = 2/3
q = 1 - p
q = 1 - 2/3
q = 1/3
And so we can calculate sample size:

n = 342
The percent markup is 11.11 %
<em><u>Solution:</u></em>
Given that, the store buys 100 shirts at a cost of $ 2700
Let us find the cost of 1 shirt

The store sells them at $ 30 each
Therefore,
Cost price of 1 shirt = $ 27
Selling price of 1 shirt = $ 30
Markup price = Selling price - Cost price
Markup price = 30 - 27
Markup price = 3
Thus markup price is $ 3
<em><u>The percent markup is given as:</u></em>

Thus the percent markup is 11.11 %
First off, we need to convert the mixed fraction to "improper", and then just multiply linearly, let's do so,