![gabbymay85](/avatars/28502.jpg)
gabbymay85
09.12.2020 •
Mathematics
Christina and her family went out for pizza and it cost $28 in Tennessee we have a sales tax that is 7% which has to be paid along with $28 what is the sales tax on $28? next Christina dad decides to leave a tip and decides to be generous and leave 20% tip on the $28 price how much did Christina and her family spend all together ?
Solved
Show answers
More tips
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
- C Computers and Internet How to Learn to Type Fast?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home Parents or Environment: Who Has the Most Influence on a Child s Upbringing?...
- H Health and Medicine Is it true that working with a computer is harmful to your eyesight?...
- H Health and Medicine Boosting Immunity: A Complete Guide on How to Improve Your Body’s Natural Defenses...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
Answers on questions: Mathematics
- M Mathematics Jina is saving money to buy a bike. She has $63 and is going to save an additional $9 each week. The bike costs $198. In how many weeks will she have enough money...
- M Mathematics Four friends bought an extra-large $12 popcorn. Each person bought their own drink. The total cost of the food can be represented by the expression 4x + $12....
- M Mathematics Laura sold t-shirts at a festival. She made $6 for each t-shirt she sold. Her expenses were $30. If she made a profit of $84, how many t-shirts did she sell? (a) Write...
- M Mathematics PLEASE HELP! 10 Points!!...
- M Mathematics What s 10+5?? :)) sdkbsdabfabnd...
- M Mathematics What is the area of an equiangular triangle with sides of length \cfrac{1}{2} 2 1 ?...
- M Mathematics Graph y=|x|-5 a b c d...
- M Mathematics Suppose a citation of AUVw by scale factor of centered at the origin which ne vertices are correct USA test prep...
- M Mathematics Tell whether the following equation has one, zero, or infinitely many solutions. 5x + 6 = 2 + 3x Group of answer choices A) Infinitely many solutions B) Zero solutions...
- M Mathematics PLEASE HELP! 10 Points!!...
Ответ:
The sample size needed is 3115.
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 z-score that has a p-value of
.
The margin of error is:
Point estimate:
95% confidence level
So
, z is the value of Z that has a p-value of
, so
.
Calculate the sample size needed to be 95% confident that the error in estimating the true value of p is less than 0.015?
This is n for which M = 0.015. So
Rounding up:
The sample size needed is 3115.