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
Nikitich [7]
3 years ago
8

If Melanie jogs 12.8 miles in 4 days, what is her mileage per day?

Mathematics
1 answer:
diamong [38]3 years ago
3 0
3.2

divide 12.8 and 4
You might be interested in
Graph a line that contains the point (-5, -6) and has a slope of 2/3.
OlgaM077 [116]

Answer:

I think this will help

Step-by-step explanation:

Make a point at(-5,-6) then go up two boxes and right three boxes.

4 0
3 years ago
Read 2 more answers
Could I have the answer to factorise 16a+12b
Tanzania [10]
Factor out the GCF, which is 4.... 4(4a+3b)
6 0
3 years ago
Read 2 more answers
What is the area of this circle? (Express your answer using π.)<br> (Note: The diameter is 6 m.)
Irina-Kira [14]


TT = 3.14


The answer is 37.68 if TT is 3.14

8 0
3 years ago
Read 2 more answers
1 - 121000<br> What is the slope of a line that is parallel to the line y = 3/4x + 2
OleMash [197]

Answer:

3/4

Step-by-step explanation:

Parallel lines have same slopes.

8 0
3 years ago
The speeds of vehicles traveling on a highway are normally distributed with an unkown population mean and standard deviation. A
Maksim231197 [3]

Answer:

The 90% confidence interval would be given by (60.09;69.91)    

We are 90% confident that the true mean for the speeds of vehicles traveling on a highway is between 60.09 and 69.91 miles per hour.

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X =65 represent the sample mean for the sample  

\mu population mean (variable of interest)

s=9 represent the sample standard deviation

n=11 represent the sample size  

2) Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n-1=11-1=10

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,10)".And we see that t_{\alpha/2}=1.81

Now we have everything in order to replace into formula (1):

65-1.81\frac{9}{\sqrt{11}}=60.09    

65+1.81\frac{9}{\sqrt{11}}=69.91

So on this case the 90% confidence interval would be given by (60.09;69.91)    

We are 90% confident that the true mean for the speeds of vehicles traveling on a highway is between 60.09 and 69.91 miles per hour.

3 0
3 years ago
Other questions:
  • I can’t solve this. Please explain!
    14·2 answers
  • 0.38 is ten times as much as
    6·1 answer
  • How do the ratios of lengths, areas, and volumes compare in similar solids?
    15·1 answer
  • finding the amplitude, period, asymptotes, reflections, vertical shifts, and phase shifts of trig equations
    9·1 answer
  • Katie walks 1/2 mile in 1/6 hour. what is her unit rate of speed
    6·2 answers
  • What is the domain of this function?
    6·1 answer
  • Rectangle perimeter please
    10·2 answers
  • The circular base of a cone has a radius of 5 centimeters. The height of the cone is 12 centimeters, and the slant height is 13
    12·1 answer
  • -5(1 - r) - 2<br> Find r
    7·1 answer
  • Which pair of angles are the alternate exterior angles?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!