Answer:
a) We need a sample size of at least 2401.
b) We need a sample size of at least 1936.
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 margin of error is:
95% confidence level
So , z is the value of Z that has a pvalue of , so .
(a) you are unwilling to predict the proportion value at your school and
We use , which is when we are going to need the largest sample size.
So we need to find We need a sample size of at least 2401.
(b) you use the results from the surveyed school as a guideline.
Now the same calculation, just with . So
We need a sample size of at least 1936.
Erica, James, Stella, and Kim all did an experiment involving an electrically charged object. Who did repeated trials of his or her experiment?
Answer:
D, (Stella)
Step-by-step explanation:
I did the exam and option D was correct! :D
Plz help!!!!!!!!!!!!!!! 100 points! any links or wrong answers will be flaged
Part A: The Sun produces 3.9 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the Sun produce in 1.55 ⋅ 107 seconds? Express your answer in scientific notation and show your work. (5 points)
Part B: Which is the more reasonable measurement of the distance between the tracks on a CD:
1.6 ⋅ 10−3 mm or 1.6 ⋅ 103 mm? Justify your answer. (5 points)
Answer:
Part A: 431070.9 ergs
Part B: 1.6 x 103mm
Step-by-step explanation
Find the annual interest rate.
I = $24, P = $400, t = 2 years
The annual interest rate is _% ?
Answer:rate = 24*100/(400*2) = 3%
Step-by-step explanation:
Figure AA is a scale image of figure BB
Figure A maps to figure B with a scale factor of 1 1/2
Answer: x=3
Step-by-step explanation:
We know that the triangle got smaller. When you dilate by a scale factor of something, you multiply to make a number bigger or smaller. So x÷1.5= 2
x= 2x1.5
x= 3
WX intersects YW at point Q.
What is the value of x in degrees?
Answer:
x = 25
Step-by-step explanation:
the 2 angles are vertical angles which means they are equal so basically you do 4x-12=88, 4x=88+12, 4x=100, x=100/4, x=25
A scientist collected data on the flight of a beetle. The data was then used to create the graph below.
Based on the graph, what was the beetle's average flight speed?
Answer:
1 meter per second, or 1m/s
Step-by-step explanation:
The average speed would be the total distance over the total time, 5/5 = 1, so the average flight speed is 1 meter per second, 1m/s
help me with this please
Answer:
you have to add all of them first
Step-by-step explanation:
Which is the solution set for the following inequality
A + 2 1/2 <6
Answer:
Step-by-step explanation:
A can be anything more than 3 1/2
Hope that helps! :)
-Aphrodite
Help me please with this math question! giving brainliest to the correct answer
Answer:
Step-by-step explanation:
PLS HELP ME!
Mr. Henry has a basket full of fruit. He does not
know how many pieces of fruit are in the basket
or the types of fruit. Each of the 20 students in
his class selects one piece of fruit from the basket
without looking, notes its fruit type, and then puts
it back in the basket. Based on the results shown
in the table, what can the students conclude
about the probability of selecting an apple?
Answer:
[tex]\frac{5}{20}[/tex] OR [tex]\frac{1}{4}[/tex]
Step-by-step explanation:
Simply put, the total amount of fruits in the basket is 20. Since there are only 5 apples, this makes you only have a 5/20 chance of picking an apple. If you simplify that ratio, you get 1/4.
Good Luck!!!!
brainlist
Which formulas will you use to find the area of this irregular figure? Select all that apply.
A = one-half b h
A=b+h
A=bh
A=2bh
A=2(b+h)
Here, two formulas we will use to find the area of this irregular figure.
A = one-half b × h
A=b + h
What is the area of a right-angle triangle?
The area of a right-angle triangle is = one-half × base × height = one-half b h.
What is the area of a parallelogram?
The area of a parallelogram = base × height = b h.
We can easily divide this irregular figure into a right-angle triangle and a parallelogram.
Hence, A = one-half b × h and A=b + h; two formulas will be required to find the area of this irregular figure.
Learn more about the area of an irregular figure here: https://brainly.com/question/23449437
#Tag #SPJ2
Help! please help me quick
Answer:
2/9
Step-by-step explanation:
If we changed the 3 to a 0 in the equation, what would happen to the graph?
Answer:
The graph will be three units lower
Step-by-step explanation:
The graph will be three units lower
The position of the graph will shift 3 units lower on the y axis.
If we changed the 3 to 0
What is the equation?
Equation, is values of two expression that are equal.
now,
y = -.14x
y=-0.14x passes through origin as shown in the graph attached below.
Learn more about equation here:
https://brainly.com/question/10413253
#SPJ2
"select the graph that does not represent 2 quantities in a proportional relationships" thx <3
In the image, shape is similar to shape . Find the measure of side .
Free brainliest if correct
Answer:
the answer is c
Step-by-step explanation:
A city park in the shape of a rectangle measures 90 yards by 120 yards. A rectangular playground inside the park measures 18 yards by 24
yards. What is the area of the city park around the playground?
Answer:
wouldn't the answer be 10800 yards
Step-by-step explanation:
because the formula of the area of a rectangle is l x w. so 90 x 120 is 10800
What is the area of this shape?
PLSSS HELPPP THIS IS MY LAST QUESTIONS
Answer: C
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
A cylinder is made up of two parallel congruent circles and a rectangle which base is the circumference of the circle.
I need help includes brainliest to the right answer
HELP!!! PLEAAAAAAAAAAAAAAAAAAAASE
How was purple triangle transformed into the orange triangle
shifted 1 unit right and then 5 units up
shifted 1 unit left and then 5 units up
shifted 1 unit right and then 5 units down
shifted 1 unit left and then 5 units down
I'm not understanding this can you help me
Answer:
gawin mo pag isipan mo wag puro brainly
I need help ASAPP!! includes brainliest
Answer:
80 gallons
Step-by-step explanation:
looking at t=0 the graph is at 80, unless there is more info I would say that the inital value was 80 gallons.
Answer: It is 80
Step-by-step explanation: The initial value, or y-intercept, is the output value when the input of a linear function is zero. It is the y-value of the point at which the line crosses the y-axis.
What is a function? Why is domain (input) and range (output) important when defining a function?
Answer:
A function is a relationship in mathematics where for each input, there is one and ONLY one output.
Help please this is making me lose braincells- Giving brainliest
Answer:
d - costa - number of attendeesIf budget is $99, then the equation is:
99 = a + 96a = 99 - 96a = 3Maximum number of attendees is 3
1. Two of the angles of a triangle measure 20° and 140°. Classify the triangle.
A. Scalene
B. Isosceles
C. Equilateral
Answer:
B
Step-by-step explanation:
if two sides are equal but one side is different it is called an isosceles triangle.
Find the value of z: 1/2 Z=8
This is 6th grade math
Answer:
Step-by-step explanation:
4
Help me please..??????
Answer:
C is correct :)
Step-by-step explanation:
Select the correct answer.
Which equation could be solved using this application of the quadratic formula?
x=-8±√8²-4(3)(-2) / 2(3)
Answer choices are:
A. -2x² − 8 = 10x − 3
B. 3x² − 8x − 10 = 4
C. 3x² + 8x − 10 = -8
D. -2x² + 8x − 3 = 4