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
Makovka662 [10]
3 years ago
10

Donations to an annual fundraiser are 15% greater than last year. Last year, donations were greater 10% than the year before. Th

e amount raised this year is $10,120. How much were raised 2 years ago?

Mathematics
1 answer:
jasenka [17]3 years ago
5 0
Here I try to help you. Hope you understand it.

You might be interested in
Paula has two fish tanks that are leaking. The first fish tank hold 50 gallons of water and is leaking at a rate of 5 gallons pe
sergey [27]

Answer:what is the question

Step-by-step explanation:

5 0
3 years ago
What is the perimeter, in terms of x, of the rectangle shown here?​
MaRussiya [10]
8x^2+10x-18
The explanation is in the picture below if needed

3 0
2 years ago
What is the answer 25b • (3a2 - 1)
Usimov [2.4K]

Answer:

Step-by-step explanation:

25b * (3a² - 1) = 25b * 3a² - 25b * 1

                     = 75ba² - 25b

Distributive law upon subtraction:

a(x - y) = ax - ay

4 0
3 years ago
Read 2 more answers
Because of safety considerations, in May 2003 the Federal Aviation Administration (FAA) changed its guidelines for how small com
Rasek [7]

Answer:

a) The 95% confidence interval for the mean summer weight (including carry-on luggage) of Frontier Airlines passengers is between 179 and 187 pounds. This means that we are 95% sure that the mean summer weight of all Frontier Airlines passengers is between these two values.

b)

The 95% confidence interval for the mean winter weight (including carry-on luggage) of Frontier Airlines passengers is between 185.4 pounds and 194.6 pounds. This means that we are 95% sure that the mean winter weight of all Frontier Airlines passengers is between these two values.

c) They are respected, as the upper bound of both intervals is below the new FAA recommendations.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve these questions.

Question a:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 100 - 1 = 99

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 99 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 1.9842

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.9842\frac{20}{\sqrt{100}} = 4

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 183 - 4 = 179 pounds.

The upper end of the interval is the sample mean added to M. So it is 183 + 4 = 187 pounds.

The 95% confidence interval for the mean summer weight (including carry-on luggage) of Frontier Airlines passengers is between 179 and 187 pounds. This means that we are 95% sure that the mean summer weight of all Frontier Airlines passengers is between these two values.

Question b:

Critical value is the same(same sample size and confidence level).

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.9842\frac{23}{\sqrt{100}} = 4.6

The lower end of the interval is the sample mean subtracted by M. So it is 190 - 4.6 = 185.4 pounds.

The upper end of the interval is the sample mean added to M. So it is 190 + 4.6 = 194.6 pounds.

The 95% confidence interval for the mean winter weight (including carry-on luggage) of Frontier Airlines passengers is between 185.4 pounds and 194.6 pounds. This means that we are 95% sure that the mean winter weight of all Frontier Airlines passengers is between these two values.

c. The new FAA recommendations are 190 pounds for summer and 195 pounds for winter. Comment on these recommendations in light of the confidence interval estimates from Parts (a) and (b).

They are respected, as the upper bound of both intervals is below the new FAA recommendations.

7 0
3 years ago
A seller buys an item from a manufacturer for $9,500. He increases the cost by 5 percent. What is the markup value?
Lynna [10]

5% of 9,500 is 475 so you would add them together. 9,500 + 475 = 9,975 so 9,975 is the answer

5 0
3 years ago
Read 2 more answers
Other questions:
  • 5(8x-4)-10=40x-20-10
    6·2 answers
  • Equation of the line that passes through the point (-8,-1) and is parallel to the line x-4y=4x−4y=4?
    11·1 answer
  • Find the difference 18-15
    14·2 answers
  • write the equation that describes the line in slope-intercept form. slope = 4, point (3, −2) is on the line y = 4x 14 y = 4x − 2
    11·1 answer
  • Find an equation of the circle that has center (1, -1) and passes through (5, -6).
    14·1 answer
  • This is part b thx for the help on the others im tryna mark u ppl
    10·2 answers
  • HELP ME PLEASE NOBODY IS ACTUALLY HELPING THIS OS SO HARD AND IM STUCK 7TH GRADE MATH
    8·2 answers
  • Rational functions v and w both have a point of discontinuity at x = 7. Which equation could represent function w?
    5·1 answer
  • Write the linear equation that gives the rule for this table.
    15·1 answer
  • I need to know what it is
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!