![shalcarter2001](/avatars/10509.jpg)
shalcarter2001
28.12.2019 •
Mathematics
There is a proposal before congress to build a so-called fourth-generation nuclear reactor at the idaho national laboratory. government officials want to estimate the true proportion of citizens in the state who support building the reactor. the most recent survey on idaho public opinion about building nuclear reactors showed 40% in favor. if the government officials want a margin of error of 4% and a confidence level of 90%, how many voters will they need to survey?
Solved
Show answers
More tips
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
- H Health and Medicine Why Wearing a Back Brace Can Be Beneficial During Back Strain?...
- S Sport When and Where Will the 2014 World Cup be Held?...
- C Computers and Internet How to Choose a Monitor?...
Answers on questions: Mathematics
- M Mathematics HELPPP PLZZZ PHOTO ATTACHED...
- M Mathematics What is the solution for the variable in the equation 7x - (3x + 4) = -2(2x - 1) 1 + 10 *...
- M Mathematics Geoff uses some wire to hang a picture on his wall. when the picture is hung the a wire forms a triangle with two equal angles. The angle at the top of the triangle is 60° larger...
- M Mathematics Jim’s front yard is 50 feet by 40 feet. He wants to spread pine straw 3 inches thick over the entire yard. A bale of pine straw will cover 20 cubic feet. What is the minimum number...
- M Mathematics 36. The coordinates of the following points represent the vertices of a rectangle. E: (4,2) F: (10,2) G: (10,8) H: (4,8) What is the perimeter, in units, of rectangle EFGH? * A....
- M Mathematics Given the following triangle, select all the true equations: B 15 63° y 27° А X cos(63) = 15 sin(27) 15 tan(63) 를 sin(63) = 1 tan(27)...
- M Mathematics Jon has $700 in a savings account that earns 5% interest per year. The interest is not compounded, How much interest will he earn in 1 year? Use the formula 1 = prt, where is the...
- M Mathematics Carla has just bought a three-legged stool. A line on the floor around the legs of the stool creates a triangle with two equal angles plus another angle of 75 degrees What are the...
- M Mathematics Yall pls this not funny anymoreee pls helpp...
- M Mathematics Find the measure of each numbered angle or arc. PLEASE HELP...
Ответ:
406
Step-by-step explanation:
Data provided in the question:
Margin of error, E = 4% = 0.04
Probability of people in favor, p = 40% = 0.4
Confidence level = 90%
Now,
For 90% confidence level, the z value = 1.645
let n be the required sample size
Thus,
n = p(1 - p)( z ÷ E)²
or
n = 0.4 × (1 - 0.4)( 1.645 ÷ 0.04 )²
or
n = 0.4 × 0.6 × 1691.265625
or
n = 405.90 ≈ 406
Ответ:
1.
Hypotenuse = 14
Base = 12
According to Pythagoras theorem,
Hypotenuse² = base² + height²
=> 14² = 12² + a²
=> 196 – 144 = a²
=> √52 = a
=> a = 7.21
2.
Base = 4
height = 13
According to Pythagoras theorem,
Hypotenuse² = base² + height²
=> 13² = 4² + a²
=> 169 = 16 + a²
=> 169 – 16 = a²
=> √153 = a
=> a = 12.36