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
ASHA 777 [7]
3 years ago
13

Construct and interpret a 95% confidence interval estimate for the difference in the mean number of cell phone calls per month f

or 18-24-year-olds and 45-54-year-olds.
Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

25 per month

Step-by-step explanation:

You might be interested in
The graph below could be the graph of which exponential function
Irina-Kira [14]
The correct answer is C. F(x)=2 * (0.7)^x
4 0
3 years ago
Read 2 more answers
A train accelerates at an average rate of 0.33 meter per second squared, and the
ANTONII [103]

Answer:

I don't know

Step-by-step explanation:

please mark me as the brainlist

3 0
3 years ago
81 is 37.5% of what number?
laila [671]

Hi,

81 is 37.5% of 216.

"1. We assume, that the number 37.5 is 100% - because it's the output value of the task.  

2. We assume, that x is the value we are looking for.  

3. If 100% equals 37.5, so we can write it down as 100%=37.5.  

4. We know, that x% equals 81 of the output value, so we can write it down as x%=81.  

5. Now we have two simple equations:

1) 100%=37.5

2) x%=81

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=37.5/81

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 81 is what percent of 37.5

100%/x%=37.5/81

(100/x)*x=(37.5/81)*x       - we multiply both sides of the equation by x

100=0.46296296296296*x       - we divide both sides of the equation by (0.46296296296296) to get x

100/0.46296296296296=x  

216=x  

x=216                          "

Have a great day!

3 0
3 years ago
Dave rented a limousine for his wife's birthday. The hourly rate is $70. They used the limousine for 5 hours, plus Dave gave the
denis-greek [22]

Answer:

i think that in total, he spent $385

Step-by-step explanation:

70 times 5, and then find 10% of that

7 0
3 years ago
A large concrete water pipe is being laid underground. The pipe has a diameter of 24 inches and is laid in 40 foot sections. How
Dvinal [7]
Volume=hpir^2
d/2=r, 24/2=12=r
h=40

v=40pi12²
v=40pi144
v=5760pi cubic inches per section
5 0
3 years ago
Other questions:
  • Find the sum of an infinite geometric series where a1 = 180, and the common ratio is r = 3∕4 ? Question 9 options: A) 240 B) 360
    15·1 answer
  • If 7x+3=24, find the value of -5 - 6x.<br><br> a)-23<br> b)-7<br> c)1<br> d)17
    14·1 answer
  • Which of the following figures could have six equal sides?
    12·2 answers
  • A boat is 75 miles west and 60 miles north from the nearest port. What bearing should be taken to sail directly to port? S 39° E
    11·1 answer
  • Benny bought six new baseball trading cards to add to his collection . The next day his dog ate half of his collection. There ar
    9·1 answer
  • Can someone tell me the area of this, please
    11·2 answers
  • A college radio station sponsors a contest once a week. One resident from a dormitory calls in and tries to answer ten questions
    5·1 answer
  • What is the first step in solving this equation? 2(3x - 4) = 3x + 1 a combine like terms b move x to the other side c distributi
    13·1 answer
  • Vertical Angles
    14·1 answer
  • Find the equation of the line through point (−5,5) and perpendicular to y=59x−4
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!