1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bezimeni [28]
3 years ago
15

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackth

orn wand has a price of 45.20
Mathematics
1 answer:
Anna11 [10]3 years ago
8 0

Complete Question

A set of magical wand prices are normally distributed with a mean of 50 dollars and a standard deviation of 4 dollars. A blackthorn wand has a price of 45.20. What proportion of wand prices are lower than the price of the blackthorn wand? You may round your answer to four decimal places

Answer:

0.1151

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score = $45.20

μ is the population mean = $50

σ is the population standard deviation = $4

We are solving for x < 45.20

Hence:

z = 45.20 - 50/4

z = -1.2

Probability value from Z-Table:

P(x<45.20) = 0.11507

Approximately to 4 decimal places = 0.1151

Therefore, the proportion of wand prices that are lower than the price of the blackthorn wand is 0.1151

You might be interested in
WILL GIVE BRAINLEIST The table shows an estimate of the average hourly emissions of sulfur dioxide, SO2, in pounds per megawatt-
baherus [9]

Answer:Transcribed image text: on 54 of 54 8 Review Constants 1 Periodic Table On its website, the EPA claims that sulfur dioxide levels have fallen by 85% between 1990 and 2016. Calculate the percent decrease between these two years to determine whether this claim accurate. Express your answer as a percentage. View Available Hint(s) ? ΑΣφ percent decrease % Submit Part B The EPA air quality standard for SO2 is 75 ppb. In what year did the average U.S. SO2 concentration begin to meet this standard? Express your answer as a year, in the format YYYY. View Available Hint(s) first year 75 ppb standard met: Submit Part C 54 of 54 Review Constants 1 Periodic Table Part What is the percent by mass of S in SO2? Express your answer as a percentage to four significant figures. View Available Hint(s) IVO AE ? % Submit Part D A 100 m room with an SO2 concentration of 75 ppb contains about 0.017 g SO2. How many sulfur atoms does it contain? Express your answer to two significant figures. View Available Hint(s) VE] ΑΣφ ? atoms Submit Sulfur dioxide is a pollutant emitted primarily by coal-burning power plants and industrial smelters. Sulfur dioxide in air affects the respiratory system in humans and is the main cause of acid rain. Thanks to the Clean Air Act and its amendments, sulfur dioxide levels in the United States have dramatically fallen over the past 30 years. The graph below shows the mean sulfur dioxide levels from 136 measuring sites in the United States for the period 1990 to 2016. Examine the graph and answer the questions that follow. Sulfur Dioxide Mean Concentration 140 120 100 80 SO, Concentration (ppb) 60 40 20 0 1990 1995 2000 2005 2010 2015 Year 2020

Step-by-step explanation:

Transcribed image text: on 54 of 54 8 Review Constants 1 Periodic Table On its website, the EPA claims that sulfur dioxide levels have fallen by 85% between 1990 and 2016. Calculate the percent decrease between these two years to determine whether this claim accurate. Express your answer as a percentage. View Available Hint(s) ? ΑΣφ percent decrease % Submit Part B The EPA air quality standard for SO2 is 75 ppb. In what year did the average U.S. SO2 concentration begin to meet this standard? Express your answer as a year, in the format YYYY. View Available Hint(s) first year 75 ppb standard met: Submit Part C 54 of 54 Review Constants 1 Periodic Table Part What is the percent by mass of S in SO2? Express your answer as a percentage to four significant figures. View Available Hint(s) IVO AE ? % Submit Part D A 100 m room with an SO2 concentration of 75 ppb contains about 0.017 g SO2. How many sulfur atoms does it contain? Express your answer to two significant figures. View Available Hint(s) VE] ΑΣφ ? atoms Submit Sulfur dioxide is a pollutant emitted primarily by coal-burning power plants and industrial smelters. Sulfur dioxide in air affects the respiratory system in humans and is the main cause of acid rain. Thanks to the Clean Air Act and its amendments, sulfur dioxide levels in the United States have dramatically fallen over the past 30 years. The graph below shows the mean sulfur dioxide levels from 136 measuring sites in the United States for the period 1990 to 2016. Examine the graph and answer the questions that follow. Sulfur Dioxide Mean Concentration 140 120 100 80 SO, Concentration (ppb) 60 40 20 0 1990 1995 2000 2005 2010 2015 Year 2020

7 0
2 years ago
Which of the following does not have the same value as the others?
maxonik [38]

Answer:

b 9/15 don't have the same

8 0
3 years ago
WILL MARK AS THE BRAINLIEST!! The volume of a cube depends on the length of its sides. This can be written in function notation
andre [41]
The answer is D. 

"A cube with the side lengths of 4 feet has a volume of 64 cubic feet." 
5 0
3 years ago
A rectangular rug measures 9 feet by 6 feet. The rug has two nooverlapping yellow circles that each have a diameter of 3 feet. T
adelina 88 [10]

Answer:

54%

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the surface area of the given figure? and how did you find the answer?
Westkost [7]
2280 cm2, 2*((24*10)/2)+24*34+10*34+34*26=2280
4 0
3 years ago
Other questions:
  • Given f(x) = 2 / x-3 , find f(4)
    10·1 answer
  • How do you draw 1/2 of 1/4
    10·2 answers
  • the distance between cincinnati ohio and charlotte north carolina is about 336 miles the distance between cincinnati and chicago
    9·1 answer
  • Plzz Help!! WIll Upvote!!
    9·1 answer
  • Lucas had 18 markers. He lent 1/6 of them to Isaac and 1/9 of them to Abby. In total, how many markers did he lend?
    10·1 answer
  • During the winter of 2012-2013, Buffalo, New York received 22 inches of snow in 12 hours. Oswego, New York received 31 inches of
    13·1 answer
  • I need help plz help me what’s the slope
    9·2 answers
  • Please help i will give extra points
    10·1 answer
  • 3. A BMW convertible travels at a speed of 50 miles per hour (mph) for 2.5 hours. What
    5·1 answer
  • -1 + 6(-1 - 3x) &gt; -39 - 2x.<br> -<br> A.X&lt;2<br> B. x &lt; 3<br> C. x &lt;-3<br> D. x &lt; -10
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!