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
nlexa [21]
2 years ago
6

Cara is a high school student. On average, there are 26 students per class at her school, with a standard deviation of 3 student

s. What percentage of classes at Cara's high school will have between 20 students and 35 students?
A. 0.15%
B. 97%
C. 99%
D. 0.3%
Mathematics
1 answer:
aliina [53]2 years ago
8 0

Answer:

B. 97%

Step-by-step explanation:

20 students is -2 standard deviations away from the mean

35 is +3 standard deviations away from the mean

100 - 2.4 = 97.6

(2.4 is amount of data we are not using)

please refer to the standard deviation graph attached :)

You might be interested in
Find x and y. (4,3),(5,y); slope= 3
Delvig [45]
X could either be 4 or 5, depending on which x the question asks. If you have to chose one answer go with 5 because it's associated with the y.

5 0
3 years ago
What is the domain of the function 1x)= 2
Gnesinka [82]

Answer:

According to me, the answer is

Step-by-step explanation:

all real numbers

6 0
3 years ago
A pack of cinnamon-scented pencils sells for $5.00. What is the sales tax rate if the total cost of the pencils is $5.20?
Leya [2.2K]
Calculate the percentage increase,work out the difference (increase) between the two numbers you are comparing. Then divide the increase by the original number and multiply the answer by 100. 

520-500 = 20
20÷500 =.04
.04 ×100= 4%
3 0
3 years ago
AX + B = C what is X equal to?
elena-14-01-66 [18.8K]

Answer:

x is a variable

Step-by-step explanation:

what happens an squared plus B equals C and what I want to do is solve for a so again what we want to do is when we're taking solver a we want to isolate the variable get the variable by itself so the data that need to look at well what is happening on my variable a well you can see me as being multiplied by X and it's being added by B so I need to undo those but we got to make sure we undo them in a certain upper certain order which we call the reverse order of operations which is like the order of operations but the reverse method meaning I'm gonna undo addition or subtraction first so you can see that since my variable a is being added by B I need to undo that by subtracting B and I'll use my subtraction property of equality that's going to now subtract a 0 and then these C minus B are not like terms so I'm going to write ax is equal to C minus B now I need to solve for a so I need to look at and say alright my a is being x over X so the inverse operation of multiplying is dividing by X so therefore have a equals C minus B divided by X now sometimes you could say alright that's correct but we could also divide this X into both of these terms and I'm going to rewrite this in a different form I could say a equals C over X minus B over X alright so what I'm doing is are just dividing those through

hope this helps

5 0
3 years ago
Does the graph below represent a proportional relationship?
aleksklad [387]
The answer is A.
The reason being straight lines mean equal proportions, while curved lines are exponential or quadratic.
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the distance (in units) between points C and D? Round your answer to the nearest hundredth. 2.83 units
    14·1 answer
  • Use the net below to determine the surface area of the cylinder. (Use 3.14 for π.) 640.56 cm^2 339.12 cm^2 753.6 cm^2 512.56 cm^
    14·1 answer
  • Plz help i just started pretty confused
    13·1 answer
  • 05.06)Use a net to find the surface area of the right triangular prism shown below ​
    14·2 answers
  • I need help pleasee!!!!
    9·1 answer
  • I need help pls I’ll give the brain thing if u get right
    9·1 answer
  • Expressions that are equivalent to x5/8
    12·1 answer
  • 21. 2n= 53 <br><br> Explanation of the division please, and how you got the answer
    15·1 answer
  • X + y = 5 2x - y = 1 substitution method
    11·2 answers
  • Order the following expressions from least to greatest<br><br> (Quick Please)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!