Answer:
-6
Step-by-step explanation:
Answer:
-6
Step-by-step explanation:
i simplafied.
Pls help I’ve been stuck on this for a while.
Answer:
The answer to this question your asking is b
"A waiter believes the distribution of his tips has a model that is slightly skewed to the left​, with a mean of ​$10.60 and a standard deviation of ​$6.60. He usually waits on about 50 parties over a weekend of work. ​a) Estimate the probability that he will earn at least ​$600. ​b) How much does he earn on the best 1​% of such​ weekends?"
Answer:
(a) 0.0668
(b) $638.74
Step-by-step explanation:
Let X denote the tips earned by a waiter.
It is provided that X follows a left-skewed distribution with mean, μ = $10.60 and standard deviation, σ = $6.60.
It is also provided that, the waiter usually waits on about n = 50 parties over a weekend of work.
According to the Central Limit Theorem if we have a population with mean μ and standard deviation σ and we take appropriately huge random samples (n ≥ 30) from the population with replacement, then the distribution of the sum of values of X, i.e ∑X, will be approximately normally distributed.
Then, the mean of the distribution of the sum of values of X is given by,
[tex]\mu_{S}=n\mu\\[/tex]
And the standard deviation of the distribution of the sum of values of X is given by,
[tex]\sigma_{S}=\sqrt{n}\sigma[/tex]
As the sample size is large, i.e. n = 50 > 30, the Central Limit Theorem can be used to approximate the sampling distribution of total tips by the normal distribution.
The mean and standard deviation are:
[tex]\mu_{S}=50\times 10.60=530\\\\\sigma_{S}=\sqrt{50}\times 6.60=46.67[/tex]
(a)
Compute the probability that he will earn at least $600 as follows:
[tex]P(S\geq 600)=P(\frac{S-\mu_{S}}{\sigma_{S}}\geq \frac{600-530}{46.67})\\\\=P(Z>1.50)\\\\=1-P(Z<1.50)\\\\=1-0.93319\\\\=0.06681\\\\\approx 0.0668[/tex]
Thus, the probability that he will earn at least $600 is 0.0668.
(b)
Let x represents his earnings on the best 1% of such weekends.
That is, P (X < x) = 0.99.
⇒ P (Z < z) = 0.99
The corresponding z-score is, 2.33.
Compute the value of x as follows:
[tex]z=\frac{S-\mu_{S}}{\sigma_{S}}\\\\2.33=\frac{x-530}{46.67}\\\\x=530+(2.33\times 46.67)\\\\x=638.7411\\\\x\approx 638.74[/tex]
Thus, on the best 1% of such weekends the waiter earned $638.74.
HELPP PLEASE WILL GIVE BRAINLIEST‼️‼️
I think that the correct answer is D
can someone please answer this for me
z=5x-11y
A study of 800 homeowners in a certain area showed that the average value of the homes was $82,000, and the standard deviation was $5000. How many of these homes have a value greater than $83,500.
Round to a whole number.
I got 62 it says that is wrong answer.
Answer:
400
Step-by-step explanation:
it says average which probably means 400
33.36% of these homes have a value greater than $83,500.
The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:
[tex]z=\frac{x-\mu}{\sigma} \\\\where\ x \ is\ raw\ score,\mu=mean,\sigma=standard\ deviation[/tex]
Given that μ = $82000, σ = $5000.
For x > 83500:
[tex]z=\frac{83500-82000}{5000} =0.43[/tex]
From the normal distribution table, P(x > 83500) = P(z > 0.43) = 1 - P(z < 0.43) = 1 - 0.6664 = 33.36%
33.36% of these homes have a value greater than $83,500.
Find out more at: https://brainly.com/question/15016913
Jimmy is trying to save money to buy a new IPhone. If the amount of money in his account after x weeks is
represented by the function(x) = 15x + 88. Explain the meaning of each part of the function in the context of the
problem.
Answer:
(x) = 15x + 88.
(x)= is the number of weeks
15x= the amount of money per x weeks
88= the amount of money after x weeks.
I am not totally sure my answer is correct though.
Step-by-step explanation:
The trail mix you are making calls for 3 cups of raisins for each cup of peanuts. How many cups of raisins do you need if you have 3 cups of peanuts?
*18 points*
Answer:
the answer is 9 cups of raisins
Need help asap! Complete the table below.
Answer:
Step-by-step explanation:
if the speed is 6 bracelets per hour then the table will go like this
2 12
5 30
7 42
11 66
16 and 2/3 hours is 100 bracelets
A construction company can remove 3/4 tons of dirt from a construction site each hour. how long will it take them to remove 36 tons of dirt from the site? (Answer needs to be in simplest form)
Answer:
48hours
Step-by-step explanation:
36÷(3/4)
36*(4/3)
144/3
48
factorize 20m2²-80mn²
Answer:
40m - 160m = 120m
Step-by-step explanation:
7 Given: -8(w + 1) = -5(w + 10); Prove: w = 14
Statements
Answer:
w=14
Step-by-step explanation:
-8(w + 1) = -5(w + 10)
Remove the parentheses
-8w-8+-5w-50
Move terms
-8w+5w=-50+8
Collect like terms and calculate
-3w=-42
Then divide on both sides
Given: a mod 7 = 5 and b mod 7 = 6 Find (a + b)mod 7. Do not use specific numbers for a and b. Consider a, b as generic particulars. Show steps but you do not need to provide reasons.(7 points)
Answer:
wouldn't it be 77
Step-by-step explanation:
If 7 = 5 is a and 7 = 6 is b and you add them you will get 11 then multiply it by 7 which would give you 77
or If you add 7 + 7 = 14 multiply 11
Or the answer is 154
I WILL GIVE BRAINLIEST TO FIRST RIGHT ANSWER
Answer:
5.7 m/sStep-by-step explanation:
Approximate rate of change:
(25.1 - 2.3)/(4 - 0) =22.8/4 = 5.7 m/sThe temperature of a cup of coffee changed by -54 Fahrenheit over 22 and 1/2 minutes. What was the change in temperature each minute?
Answer:
-2 2/5 F per minuteStep-by-step explanation:
Temperature change:
- 54 F over 22 1/2 minChange in 1 minute:
-54 / 22 1/2 = -54 / (45/2) =-54*2 / 45 =-108 / 45 =-2 18 / 45 =-2 2/5 F/minA line with greater slope is steeper than a line with a smaller slope true or false ?
Answer:
True
Step-by-step explanation:
Answer: True.
Step-by-step explanation: Because the greater the slope, the steeper the line.
how many solutions are there 14x + 6 = 2(5 + 7x) - 4
Answer:
infinitely many solutions
Step-by-step explanation:
14x + 6 = 2(5+7x)-4
14x + 6 = 10 + 14x - 4
14x + 6 = 14x + 6
infinitely many solutions because both sides of the equation are equal
what is the function of this graph?
Answer:
-2 X3
Step-by-step explanation:
Read this excerpt from “The Girl Who Silenced the World for Five Minutes.”
I'm only a child, yet I know we are all part of a family, five billion strong, in fact, thirty million species strong, and we all share the same air, water, and soil – borders and governments will never change that.
I'm only a child, yet I know we are all in this together and should act as one single world towards one single goal.
Why does Suzuki think people should “act as one single world”?
We all have different governments.
Borders separate our countries.
There are five billion people on Earth.
We all live on the same planet.
its d we all live on the same planet
Step-by-step explanation: trust me sorry if im wrong
Answer:
d
Step-by-step explanation:
What is the equation of a line that passes through the point (3, 11) and is parallel to the line y=2x-4
Answer:
The answer should be y=2x+5
Jimmy needs to save at least $30 to buy a new video game. Write an inequality that represents
this situation.
Answer:
About $10
Step-by-step explanation:
We know that Jimmy equally needs enough money to buy a new video game, which is $30.
Since more than 1 number equals 30, there might be multiple answers for this.
He might have about 10 dollars, hence 10 times 3 is 30.
I just need help with this please.
Answer:
-5/2 is located on the left of -1
Step-by-step explanation:
How many parts 3 percent milk and 40 percent cream would be needed to make 500 pounds of 5 percent milk
Answer:
ok i have this same question so what you are going to take the 3 and just maove it to the side and then you fail
Step-by-step explanation:
if Jazzy sells her old bike for $104 and some toys for 68 she uses the money for four month karate lessons the cost of lessons is the same each month which strip diagram shows how to find Jazzy's cost for one month of karate lessons.lend a hand please also this is 4th grade
Answer:
C
Step-by-step explanation:
She sells her bike for 104 dollars
She sells toys for 68 dollars
Total 172
The question is a bit ambiguous. There are 4 divisions. So I would assume that you need to divide 172 by 4. If you do that you get 43
I think that what they are getting at is the answer is C. There are 4 months shown. And 1 month would be 43 dollars. She has enough for 3 more months.
(2)
A bag contains red and blue cards. The probability of drawing a red card is 2/5
What is the probability of drawing a blue card?
Answer:
3/5 is the probability of drawing a blue card
Answer:
3/5
Step-by-step explanation:
total sum of probability is 1.
for the probability of drawing a red ball to be 2/5, then probability of drawing a blue ball is
1 - 2/5
What is 80% of the population?
a
b
c
d
e
f
Answer:
a) 817,600,000
b) 3,401,600,000
c) 585,600,000
d) 464,000,000
e) 280,800,000
f) 28,800,000
Step-by-step explanation:
Multiply each population by 0.8.
ex) 1,022,000,000 x 0.8 = 817,600,000
Write an equation to match this graph
Answer:
its y=x+7
Step-by-step explanation:
Is this rational or irrational I really need help ASAP! Will mark brainlist.
Answer:
Irrational
Step-by-step explanation:
Since 7 is a prime number, it has no square factors and its square root cannot be simplified. It is an irrational number, so cannot be exactly represented by pq for any integers p,q .
Answer: irrational
Step-by-step explanation: 7 is a prime number and its square root can not be simplified.
Hope this helps!
A cell phone company charges $40 per month plus a $35 activation fee.
Write a function, f(x), for the total cost for x, months.
a.
b.
Which portion of your function represents the one time fee?
C.
Which portion of the function represents the monthly cost?
d.
What does f(x) represents?
Answer:
a. y = 40x + 35
b. 35 represents the one time fee
c. The 40x represents the monthly fee
d. f(x) represents the amount you have paid after an amount of months
Step-by-step explanation:
12345678912345678991-12345678912345678912
50 POINTS!!!
Please I need fast and correct answer. I will award best answer with brainliest!!!
Answer:
[tex]measure angle 1 = 62 ------> given\\measure angle 4 = 62 --------> vertical angle theorem[/tex]
Step-by-step explanation:
vertical angle theorem states that the angle vertical from another angle has to be congruent
p.s. i found it