A store sells 12-packs of ballpoint pens for $1.09 each and composition books for $2.79 each. Cindy buys m packs of ballpoint pe
2 answers:
Answer:
Step-by-step explanation:
A store sells 12-packs of ballpoint pens for $1.09 each.
The store also sells composition books for $2.79 each.
Cindy buys 'm' packs of ballpoint pens and 'n' composition books.
So, the equation for this becomes:
And as Cindy gets a 5% discount, so she has to pay 95% of the regular price.
Then the expression that will represent Cindy’s bill is :
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Answer:
This means that the first interval, with 9000 viewers, is 3 times as narrower as the second interval, with 1000 viewers.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The width of the interval is:
In this sample:
Two 90% intervals, with different lenghts. So both have the same values for z an
Interval A:
9000 viewers.
So the width is
Interval B:
100 viewers
So the width is
Relationship between the widths:
This means that the first interval, with 9000 viewers, is 3 times as narrower as the second interval, with 1000 viewers.
Answer:
a) true
Step-by-step explanation:
The bottom-line numbers from synthetic division <em>alternate signs</em>, indicating that -2 is a lower bound. The given statement is true.
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If the signs were all positive, it would indicate the proposed zero is an <em>upper bound</em>.
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A graph shows all real zeros are greater than -2.
