Answer:
Shandra would pay $27.50 for 5 slices
Cost = 20+1.50x
Step-by-step explanation:
Given
per slice
Solving (a): Cost of 5 slices
Represent the total price with y and the number of slice with x.
So, we have:
This gives:
In this case: x = 5.
So, we have:
<em>Shandra would pay $27.50 for 5 slices</em>
<em></em>
Solving (b): Cost of x slices
This has been solved in (a).
Hence, the cost of x slices is 20+1.50x
Answer:
The correct option is d
Step-by-step explanation:
From the question we are told that
The population size is
The sample size is
The sample mean is
The standard deviation is
Given that the confidence level is 95% then the level of significance can be calculated as
Next we obtain the critical value of from z-table , the value is
The reason we are obtaining critical value of
instead of
is because
represents the area under the normal curve where the confidence level interval (
) did not cover which include both the left and right tail while
is just the area of one tail which what we required to calculate the margin of error
.
NOTE: We can also obtain the value using critical value calculator (math dot armstrong dot edu)
Generally the margin of error is mathematically represented as
substituting values
The 95% confidence level interval is mathematically represented as
substituting values
Answer:
Step-by-step explanation:
Try to say it and then write it out. I hope this helps.