Answer:
-12,-9,-3
MARK ME BRAINLIEST PLEASE
What is the range of y = -3sin(x)?
THE ANSWER
B) -3 (less than or equal to) y (less than or equal to) 3
Answer:
its b
Step-by-step explanation:
the man said so
Answer:
b
Step-by-step explanation:
1. Taylor drinks 2 liters of water during
every concert. How many milliliters did
she drink during two concerts?
Answer:
4000 Milliliters......
Lyndy conducted a survey of the 300 students in her school. She found that 60 students own dogs, while only 30 students own cats. What percent of the students own cats?
give me direct answer
Answer:
390
Step-by-step explanation:
u add all together
NO LINKS OR FILES
mFill in the y values of the t-table for the function y=3Vx
Answer:
1
Step-by-step explanation:
https://brainly.com/question/23396982?answering=true&answeringSource=greatJob%2FquestionPage%2F1
PLEASE HELP I DONT GET THIS AT ALL I BEG U! helppp!! pleaseeee!!
The probability of winning a game is 20% how many times should you expect to win if you play 36 times
wallet #1 has 5 $100 bills and 10 $20 bills.
Answer:
Wallet #1 = $500 and Wallet #2 = $200
Step-by-step explanation:
I dont know if that was the answer you were looking for?
sorry if its not... :(
Help, can anyone help? I’ve been stuck on this question :( I’ll make sure to give Brainly.
Answer:
1,524
Step-by-step explanation:
2,000 x 2%= 40
6,999 x 5%=349.95
20,999 x 5.4% = 1,133.95
40+349.95+1133.95=1,523.90
A math professor notices that scores from a recent exam are normally distributed with a mean of 61 and a standard deviation of 8. Answer the following questions using integer values.
(a) What score do 25% of the students exam scores fall below?
And, the professor decides to grade on a curve. If he wants .15% of the students to get an A, what is the minimum score required.
I have tried a "calculator" I found online and the answers it provided gave me 50% credit and I don't know which answer is correct as I don't know how to do the actual calculation.
I would appreciate referral to any valid resources as it has been many, many years since I took a math class.
(b) Suppose the professor decides to grade on a curve. If the professor wants 0.15% of the students to get an A, what is the minimum score for an A?
Answer:
a) 25% of the students exam scores fall below 55.6.
b) The minimum score for an A is 84.68.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Mean of 61 and a standard deviation of 8.
This means that [tex]\mu = 61, \sigma = 8[/tex]
(a) What score do 25% of the students exam scores fall below?
Below the 25th percentile, which is X when Z has a p-value of 0.25, that is, X when Z = -0.675.
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]-0.675 = \frac{X - 61}{8}[/tex]
[tex]X - 61 = -0.675*8[/tex]
[tex]X = 55.6[/tex]
25% of the students exam scores fall below 55.6.
(b) Suppose the professor decides to grade on a curve. If the professor wants 0.15% of the students to get an A, what is the minimum score for an A?
This is the 100 - 0.15 = 99.85th percentile, which is X when Z has a p-value of 0.9985. So X when Z = 2.96.
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]2.96 = \frac{X - 61}{8}[/tex]
[tex]X - 61 = 2.96*8[/tex]
[tex]X = 84.68[/tex]
The minimum score for an A is 84.68.
PLEASE DONT SEND LINKS OR I WILL REPORT! Emily buys meat for a charity event in her community. Chicken costs 4 AED per kg and beef burger 3 AED per kg. How much will she spend on 3.6 kg of chicken and 2.2 kg of beef burger?
Answer:
21 AED
Step-by-step explanation:
W know the cost of each kind of meat
Chicken = 4 AED
Beef = 3 AED
We also know how much of each we will be buying
Chicken = 3.6 kg
Beef = 2.2 kg
Multiply each price of meat by its respective weight, then add the products together for you final answer.
4(3.6) + 3(2.2) = 21
Please answer CORRECTLY for brainliest guarantee. If your answer is not correct or does not have a explanation I will report you!
Answer:
c. 45.34ft
Step-by-step explanation:
When leg one of the triangle is 15ft and leg two is 17 ft you would take 17^2 + 15^2 and then you find the square root of that (514) to get the hypotenuse of the triangle. After that you multiply by two to account for the 2/2 sqaure foot per each unit
A reproductive clinic had a success rate of 25% of patients with live births in 2008. They want to update their success rate (the proportion of live births) for 2020. If they want their estimate to be within 2.5%, how many patient's results should they sample if they plan to use a 99% confidence interval? Round your answer up to the nearest integer.
Answer:
They should sample the results of 1990 patient results.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the z-score that has a p-value of [tex]1 - \frac{\alpha}{2}[/tex].
The margin of error is of:
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
A reproductive clinic had a success rate of 25% of patients with live births in 2008.
This means that [tex]\pi = 0.25[/tex]
99% confidence level
So [tex]\alpha = 0.01[/tex], z is the value of Z that has a p-value of [tex]1 - \frac{0.01}{2} = 0.995[/tex], so [tex]Z = 2.575[/tex].
If they want their estimate to be within 2.5%, how many patient's results should they sample if they plan to use a 99% confidence interval?
They should sample n patients.
n is found for [tex]M = 0.025[/tex]. So
[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
[tex]0.025 = 2.575\sqrt{\frac{0.25*0.75}{n}}[/tex]
[tex]0.025\sqrt{n} = 2.575\sqrt{0.25*0.75}[/tex]
[tex]\sqrt{n} = \frac{2.575\sqrt{0.25*0.75}}{0.025}[/tex]
[tex](\sqrt{n})^2 = (\frac{2.575\sqrt{0.25*0.75}}{0.025})^2[/tex]
[tex]n = 1989.2[/tex]
Rounding up:
They should sample the results of 1990 patient results.
What fraction is equivalent to. —-
0.45?
Answer:
E. 9/20
Step-by-step explanation:
0.45=45/100=9/20
Answer:
E. 9/20
Step-by-step explanation:
0.45= 45/100
45/100 divided by 5 is 9/20
Which of the following is equivalent to ^5sqrt13^3
Answer:
The last one 13^3/5
Step-by-step explanation:
13^3/5
Round each number to the nearest thousand.
6,029
6,000
8,104
2,90
4,978
978
1,032
Answer:
6.029
6
8.104
2.9 or .29
4.978
.978
1.032
Step-by-step explanation:
Answer:
6029=6000
6000=600
8104=8000
290=0
4978=5000
978=1000
1032=1000
Noah picks a card at random from a stack that has cards numbered 5 through 20. List the sample space and tell how many outcomes there are.
Answer:
6
Step-by-step explanation:
6
Ronald runs 6,000 meters in 2 hours. He is thinking of running an 18 kilometers race. How much time will he take in the race if he maintains the same speed?
Answer:
6 hours
Step-by-step explanation:
speed = distance/ time
6000meters to km = 6000/1000= 6km
speed for the first race = 6/2
speed = 3km/hr
for the second race
speed = distance/time
3 = 18/time
cross multiply
3* t = 18
divide both sides by 3
t = 18/3
t = 6 hours
Answer:
Ronald will take 6 hours to complete the 18 km race if he maintains this speed.
Step-by-step explanation:
6000m in 2h = 6km in 2h
multiply by 3:
18km in 6h
Have a nice day!
Help! Can anyone help? It’s not 3,850 :( and I don’t know what to do,,, I’ll give Brainly!!
Answer:
tax $ 3400
Step-by-step explanation:
[tex]\left\begin{array}{ccc}10,000&3&300\\40,0000&5&2000\\20,000&5.5&1100\end{array}\right[/tex]
so, tax= $= 3400
----------------------------
hope it helps...
have a great day!!
work out the size angle of x. Give reasons for your answer
Evaluate the expression for b = 7
6b + 8 – 5b
Answer:
For b = 7, the expression equals 15.
Step-by-step explanation:
6b + 8 - 5b
Substitute the variable b = 7.
6(7) + 8 - 5(7)
Multiply.
42 + 8 - 35
Add.
50 - 35
Subtract.
15.
Answer:
15
Step-by-step explanation:
6 × 7 = 42
5 × 7 = 35
42 + 8 - 35 = 15
A researcher surveyed 220 residents of a city about the number of hours they
spend watching news on television each day. The mean of the sample was
1.8 with a standard deviation of 0.35.
The researcher can be 95% confident that the mean number of hours all the
residents of the city are watching news on television is 1.8 with what margin
of error?
Margin of error is 4.645% with 95% confidence that the mean number of hours all the residents of the city are watching news on television is 1.8 .
Data given :
A researcher surveyed 220 residents of a city about the number of hours they spend watching news on television each day. The mean of the sample was 1.8 with a standard deviation of 0.35 .
The researcher can be 95% confident that the mean number of hours all the residents of the city are watching news on television is 1.8 with what margin of error,
By formula of margin of error = [tex]M = 1.96 \times S / \sqrt{N} ,[/tex]
[tex]Margin \ of \ error, \ M = z \times \frac{s}{\sqrt{N}}[/tex]
z - represents the z-value for the required confidence level .
s - represents the standard deviation of the sample .
N - represents the sample size .
Now, using the above information, compute the margin of error as -
[tex]\therefore \ Margin \ of \ error, \ M = z \times \frac{s}{\sqrt{N}} \\= 1.96 \times \frac{0.35}{\sqrt{220}}[/tex]
[tex]=0.04625 (rounded \ to \ 5\ decimal\ places) \\\\ =4.625\%[/tex]
Thus, the margin of error, M, is approximately 4.625% .
Know more about margin of error,
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Nine less than the product of a number n and 1/4 is no more than 93
Answer:
n < 408
Step-by-step explanation:
(n/4) - 9 < 93
n - 36 < 372
n < 372 + 36
n < 408
Correct me if I'm wrong. I hope it helps
(3x^2+2y^2+3xy)-(x^2+y^2+2xy)
Answer:
6x+4y+3xy-2x+2y+2xy
4x+2y+xy
this is the answer
Step-by-step explanation:
4x+2y+xy answer
hope this will help you
Find the inverse of f(x) = 6x.
The inverse is
g(x) =
Graph the function and its inverse
Given:
The function is:
[tex]f(x)=6x[/tex]
To find:
The inverse of the given function, then draw the graphs of function and its inverse.
Solution:
We have,
[tex]f(x)=6x[/tex]
Step 1: Substitute [tex]f(x)=y[/tex].
[tex]y=6x[/tex]
Step 2: Interchange x and y.
[tex]x=6y[/tex]
Step 3: Isolate variable y.
[tex]\dfrac{x}{6}=y[/tex]
Step 4: Substitute [tex]y=f^{-1}(x)[/tex].
[tex]\dfrac{x}{6}=f^{-1}(x)[/tex]
Therefore, the inverse of the given function is [tex]f^{-1}(x)=\dfrac{x}{6}[/tex] and the graphs of these functions are shown below.
Note: The inverse function is [tex]g(x)=f^{-1}(x)[/tex].
A new bank customer with $5,000 wants to open a money market account. The bank is offering a simple interest rate of 1.4%. a. How much interest will the customer earn in 10 years? b. What will the account balance be after 10 years?
Answer:
2,745
Step-by-step explanation:
Answers:
a. The customer will earn $700 after 10 years.
b. The bank balance will be $5,700 after 10 years,
.
8
10
12
14
16
Girls
8
10
12
14
16
Boys
What is the difference between the medians for the two data sets?
O tickets
0 2 tickets
4 tickets
O 6 tickets
the following box plot shows the number of years during which 20 schools have participated in an inter-school swimming meet at least how many schools have participated for 6 years or more?
A: 4
B: 5
C: 10
D: 11
Answer:
4 schools
Step-by-step explanation:
Based on the box plot you have given above, the answer would be 20% of the total schools participated for 6 years or more. This is because the part of the box plot wherein it hits 6 years and above is 20%. Thus, if there are 20 schools, then the 20% of it would be 4. In conclusion, there are 4 schools that participated for 6 years or more.
The sides of a quadrilateral are in ratio 1:2:3:4 if the perimeter is 40cm. find the length of each sides
can anyone please help me with this I am struggling
Answer:
B, D
Step-by-step explanation:
for it to be symmetrical, you have to rotate it so it matches the other triangle.
What number is rational, less than 0, greater than -4 but is not an integer?