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
blondinia [14]
3 years ago
8

To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. The sample mean i

s $850 and the sample standard deviation is $54. A 99% confidence interval for the population mean is:_______.A) $823.72 to $876.28.
B) $832.36 to $867.64.
C) $826.82 to $873.18.
D) $825.48 to $874.52.
Mathematics
1 answer:
rewona [7]3 years ago
6 0

Answer:

its C i think

Step-by-step explanation:

You might be interested in
Need help with this! Due in 10 mins please
svetlana [45]
True for some cases
7 0
3 years ago
Read 2 more answers
The length of a rectangle is 8 feet more than its width. If the width is increased by 4 feet and the length is decreased by 5 fe
alexgriva [62]
Let the width be x.

Length is 8 feet more than width. Length = x + 8

Area = x(x + 8)

width increased by 4, that is,  (x + 4)
Length decreased by 5,    (x + 8 - 5) = (x + 3)

Area  = (x + 4)(x +3)

Area remains the same

x(x + 8) = (x+4)(x +3)

x² + 8x =   x(x +3) + 4(x +3)

 x² + 8x =   x² +3x + 4x +12

x² + 8x =   x² +7x +12        Eliminate x² from both sides

8x = 7x + 12

8x - 7x = 12

x = 12

Dimensions of original rectangle :  x,  x + 8

12, 12 +8 =   12, 20

Original rectangle is   20 feet   by 12 feet 
5 0
3 years ago
Read 2 more answers
Please Help, 35 Points.
Andrei [34K]

To answer this question, we have the start-up costs of $ 52,000

A monthly inflation of $ 0 is assumed

Operating costs  are $680

The daily gain  is $960

For the Part A.

The inequality that this situation represents

 960d-680d>52000

So:

d(960-680)>52000

Where d represents the number of days.

For the Part B.

To start earning, you must replace all the initial investment and cover the expenses per day. The time that must pass for this to happen is obtained by clearing "d" from the inequality.


 d>\frac{52000}{960-680}

d> 185.71 days

Then, the sum of the net profits will be greater than the initial investment after 186 days of starting the business.

4 0
3 years ago
7.89 greater or less than 7.189<br><br> 6.030 greater less or equal 6.03
NemiM [27]
7.89 is greater than 7.189,  6.03 is equal to 6.030, because that last zero doesn't really change anything it cancels itself out
5 0
3 years ago
Read 2 more answers
When filled, a particular round balloon has a diameter of 14 inches (in.).
icang [17]

Answer:

1436.76 in.^3

Step-by-step explanation:

This question means to find the volume of a sphere with a diameter of 14 inches. The formula for the volume of a sphere is 4/3πr^3, so we need to find the radius, which is half the diameter. Half of the diameter is 7 inches, so now we can plug in our values to find the volume is about 1436.76 cubic inches.

4 0
3 years ago
Other questions:
  • A group of students are standing in rows. There are as many students in a row as there are rows. If there are 64 students in the
    5·1 answer
  • Find the product. (4m^2 – 5)(4m^2 + 5)
    11·1 answer
  • Solve the system of equations below -3xy+6y=9
    12·2 answers
  • What is the slope and y intercept of 4×+2y=-6
    8·1 answer
  • -47=x+15 solve the equation
    11·2 answers
  • What is a number that makes an equation true
    9·1 answer
  • On April 1st, Bob the Builder entered into a contract of one-month duration to build a barn for Nolan. Bob is guaranteed to rece
    13·1 answer
  • I need help with this pls ASAP
    10·2 answers
  • Someone please answer!!
    8·2 answers
  • I am confused about ii) help please
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!