The weekly earnings of students in one age group are normally distributed with a standard deviation of $110. A researcher wishes to estimate the mean weekly earnings of students in this age group. Find the sample size needed to assure with 99 percent confidence that the sample mean will not differ from the population mean by more than $10.
Answer: 806
Step-by-step explanation:
Given that:
Standard deviation (s) = $110
Error = $10
Zcritical ; Zα/2 at 99% confidence interval = 2.58
Using the relation :
[(Zα/2 * s) / sqrt(n)] < 10
[(2.58 * 110) /sqrt(n)] = 10
283.8 / sqrt(n) = 10
283.8 = 10 * sqrt(n)
Sqrt(n) = 283.8/ 10
Sqrt(n) = 28.38
Square both sides
n = 28.38^2
n = 805.4244
n = 806
Hence, sample size = 806
Which common construction is lee performing?
Answer: I believe the answer is C. All of the other options dont have anything to do with lee and her construction
What annual simple interest rate must Jana Ewing earn to have $70,000 increase to $82,000 in two years?
Answer:
8.5%
Step-by-step explanation:
Answer:
8.5 %
Step-by-step explanation:
A sea bird is 28 meters above surface of the ocean. What is the elevation
Answer:
28 meters
Step-by-step explanation:
Calculate the sum. 23.3 + 12 + 36.7
Answer:
72
Step-by-step explanation:
You line up the decimal places (and remember 12 can look like 12.0)
Answer:
Your final answer should equal the sum of 72.
Step-by-step explanation:
23.3+12=(23+12=35)(35+.3=35.3) 35.3
35+36=71
.3+.7(from 36.7)=1
71+1=72
Simplify the expression: -5(4 – 2t) = Submit
6+12s is the answer for the expression on the picture.
-20+10t for the written expression.
4(x +y) use Use the distributive property to write the following expressions in expanded form.
Answer:
4x+4y
Step-by-step explanation:
PLZZZZ HELP MEEE WIL GIVE BRAINLEST
Point Q is plotted on the coordinate grid. Point P is at (40, −20). Point R is vertically above point Q. It is at the same distance from point Q as point P is from point Q. Which of these shows the coordinates of point R and its distance from point Q?
(5 points)
Question 12 options:
1)
Point R is at (−10, −10), a distance of 30 units from point Q
2)
Point R is at (−10, −30), a distance of 50 units from point Q
3)
Point R is at (−10, 30), a distance of 50 units from point Q
4)
Point R is at (−10, 10), a distance of 30 units from point Q
Answer:
3 is your answer im pretty sure:)))
Step-by-step explanation:
if z= 3 + 4i, what is the value of |z| ?
Answer:
5
Step-by-step explanation:
[tex]z= 3 + 4i \\ \\ |z| = \sqrt{ {3}^{2} + {4}^{2} } \\ \\ = \sqrt{9 + 16} \\ \\ = \sqrt{25} \\ \\ |z| = 5[/tex]
Is (-3,2) a solution of the equation x + y = 3?
Answer:
no
Step-by-step explanation:
plug the numbers in.
(‐3) + (2) = 3
-1 is not equal to 3.
Please help I’ll give brainiest if you’re correct
Jennifer wants to buy a new television set that regularly sells for $900. Because she works at the store, Jennifer
will receive an employee discount of 30% off the regular price, but she will have to pay 6% sales tax on the
adjusted price.
What will be Jennifer's final cost to buy the television?
A. $286.20
B. $667.80
C. $684.00
D. $1008.00
Answer:
B. $667.80
Step-by-step explanation:
Before Tax Price: $900.00
Sale Tax: 6.00% or $54.00
After Tax Price: $954.00
$954.00 - 30% = $667.80
Is there a proportional relationship between the X and Y value in this table?
Answer:
Step-by-step explanation:
No
All of the equations below are equivalent to 2x+3=x+1. Which transformation would not be justified using the commutative property
A. 2x+3=12x+4
B. 2x+3=4(1+3x)
C. x•2x=4(3x+1)
D. 3+2x=(3x+1)•4
Answer:
I think the answer is C
Step-by-step explanation: It could also be B
but then again it could be
The admission fee at an amusement park is $1.50 for children and $4 for adults. On a certain day,
276 people entered the park, and the admission fees collected totaled 664.00 dollars. How many
children and how many adults were admitted?
Your answer is
number of children equals____
number of adults equals____
Solve for x: x/-9=3 x=___
Answer:
2
Step-by-step explanation:
mdjzjsjmdmxjsjjshd
i need halp asap
give two different ratios with a description of the ratio relationship using the following information:
there are 15 male teachers in the school. there are 35 female teachers in the school.
do i make the two ratios up or like????? waaaaaaaat?????
no 15:35 and 35:15
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ___
Which of the following can be a common denominator for the fractions 3/5 and 4/9?
A. 45
B. 40
C. 9
D. 5
Answer:
A
Step-by-step explanation:
The common denominator for the fractions 3/5 and 4/9 is 45
What is the lowest common multiple?The smallest number or quantity that is exactly divisible by each member of a set of numbers is called LCM.
Given two fractions, 3/5 and 4/9
The LCM of the denominators 5 and 9 is 45.
Hence, the common denominator for the fractions 3/5 and 4/9 is 45
For more references on lowest common multiple, click;
https://brainly.com/question/26505288
#SPJ3
7*6+12+5=?? i will mark as brainliest
Answer:
[tex]59[/tex]
Step-by-step explanation:
[tex]--------------------------------------------[/tex]
[tex]7\cdot6+12+5[/tex] = [tex]?[/tex]
[tex]42+12+5[/tex] = [tex]?[/tex]
[tex]54+5[/tex] = [tex]?[/tex]
[tex]59[/tex]
[tex]--------------------------------------------[/tex]
Hope this helps! <3
[tex]--------------------------------------------[/tex]
良い日をお過ごしください！:D
[tex]--------------------------------------------[/tex]
Selma spent
9
10
of her allowance on a new backpack. What percent of her allowance did she spend?
square root 25a^2. help me pls its a emergency
Bob has a recipe for salad dressing. The recipe says to mix 14 c lemon juice, 18 c mustard, and 14 c vinegar. How much lemon juice does he need to make 4 c of salad dressing? Show your work.
1. First, think about how much salad dressing the recipe makes if you mix together 14 c lemon juice, 18 c mustard, and 14 c vinegar:
2. Next, think about how much lemon juice you will need for 1 cup of salad dressing:
3. Finally, use what you found in part 2 to find out how much lemon juice you will need for 4 cups of salad dressing:
Answer:
He needs 56c of lemon juice to make 4 salad dressings.
Step-by-step explanation:
We only need to look at how much lemon juice to make one salad dressing which would be 14c so we have to make 4 so we would do 14x4 to get how much lemon juice you need to make 4 dressings so you would need 56c of lemon juice to make 4 dressings
Answer:
He needs 56c of lemon juice to make 4 salad dressings.
Step-by-step explanation:
Please Help!! 10 points!!
Answer: This is true. For example, 3 is a multiple of 3. And zero is not a multiple of 3. When added together, 3 is still a multiple of 3.
Step-by-step explanation:
A student has a penny, nickel, dime, and a quarter. She flips them all simultaneously and checks for heads or tails. What is the probability that all four coins will come up heads
Answer:
1/ 16
Step-by-step explanation:
Flipping a coin = HT ( 2 possibilities)
Hence, total possibility (n) of flipping 4 coins
n = 2^4 = 2 * 2 * 2 * 2 = 16 possible outcomes
(HHHH, THHH, HHHT, THHT, HHTH, THTH, HHTT, THTT, HTHH, TTHH, HTHT, TTHT, HTTH TTTH, HTTT, TTTT
Probability (A) = required outcomes of A / total possible outcomes
Hence, probability that all coins comes up head :
Number of required outcome = 1
Total possible outcomes = 16
Hence,
P(all heads) = 1/16
Using the binomial distribution, it is found that there is a 0.0625 = 6.25% probability that all four coins will come up heads.
For each coin, there are only two possible outcomes, either it is heads, or tails. The outcome of each coin is independent of other coins, hence, the binomial distribution is used to solve this question.
What is the binomial probability distribution formula?The formula is:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters are:
x is the number of successes.n is the number of trials.p is the probability of a success on a single trial.In this problem:
A coin is equally as likely to come heads or tails, hence [tex]p = 0.5[/tex].The student has 4 coins, hence [tex]n = 4[/tex].The probability that all four coins will come up heads is P(X = 4), hence:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 4) = C_{4,4}.(0.5)^{4}.(0.5)^{0} = 0.0625[/tex]
0.0625 = 6.25% probability that all four coins will come up heads.
You can learn more about the binomial distribution at https://brainly.com/question/24863377
James makes $15 per hour. He works 40
hours per week. He gets paid every week. If
he has to pay 10% for FICA, 7.5% for Social
Security, and 2.9% for Medicare, what is his
take home pay or his Net Income?
Answer:
i got 485!
Step-by-step explanation:
multiply 40 by $15 = 600 then subtract 10% = 540 then subtract 7.5% = 499.5 lastly subtract 2.9% = 485 and that's his take home money :)
For a treasure hunt game, 300 balls are hidden. Of the balls that are hidden, 40% of them are yellow and the rest are white. Sally’s team finds 20% of the yellow balls and 80% of the white balls. How many balls did Sally’s team find?
Answer: sorry im useless here
Step-by-step explanation:
Answer:
poopo
Step-by-step explanation:
Answer this fast pls
Answer:
Risheeta: The sticks won’t form any triangle.
Step-by-step explanation:
Risheeta is correct. Since 2+3=5, the three sticks put together would form a line, not a triangle. The sum of the two smaller legs HAVE TO equal more than the third leg in order to make a triangle.
(It won’t let me spell her name correctly because it “contains a swear word”!
I need to find the area of these if you do it I will give you a 5-star rating and share you with other people brainiest included
Answer:
help me first plz
Step-by-step explanation:
Answer:
1. 28
2. 161
A=LxW
(Length x Width= Area)
pleaseeee help :( need answer asap please try your best
Hello!
[tex]\large\boxed{x = 3}[/tex]
Looking at the graph, we can see that both of the lines intersect at a single point.
Looking at the intersection point, we get an x value of x = 3.
*This can also be proven algebraically by setting the two equations equal to each other:
x + 3 = 4x - 6
3 = 3x - 6
9 = 3x
9/3 = 3x/3
x = 3
A customer has $10 to insert in a jukebox that plays songs for $1 each. When x represents whole numbers less than 10, the function f (x) = 10 – 2
represents the amount of money remaining after x songs are played on the jukebox
What is the value of f (7), in dollars and cents?
PLEASE HELP I WILL GIVE BRAINLIST!!!!!!!!!!!!
Change to the fractional equivalent. 0.7777777... Be sure to simplify your
answer.
Answer:
7/9
Step-by-step explanation:
7 divided by 9 is .7777777777....
