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garik1379 [7]
3 years ago
8

A bird flew 60 miles in 5 hours. What was its speed?Answer

Mathematics
2 answers:
lord [1]3 years ago
8 0

Answer:

12 miles per hour

Step-by-step explanation:

First do 60/5 then

60/5 = ?

So do the math:

60/5 = 12

Hence 12 miles per hour.

Anton [14]3 years ago
7 0

Answer:

12 mph

Step-by-step explanation:

Speed = distance/time

Speed = 60/5 = 12 mph

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A study of the effect of smoking on sleep patterns is conducted. The measure observed is the time, in minutes, that it takes to
nordsb [41]

Answer:

The group that has greater value of relative dispersion is the smokers group, as the coefficient of variationof their data is bigger than the coefficient of variation of the non-smokers group data.

CV smokers: 0.387

CV non-smokers: 0.234

Step-by-step explanation:

We will calculate the relative dispersion of each data set with its coefficient of variation (ratio of the standard deviation to the arithmetic mean).

Then, first we calculate the mean and standard deviation for the smokers data:

Mean: 43.7

Standard deviation: 286.5

M_s=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M_s=\dfrac{1}{12}(69.3+56+22.1+47.6+53.2+. . .+13.8)\\\\\\M_s=\dfrac{524.4}{12}\\\\\\M_s=43.7\\\\\\s_s=\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M_s)^2\\\\\\s_s=\dfrac{1}{11}((69.3-43.7)^2+. . . +(13.8-43.7)^2)\\\\\\s_s=\dfrac{3152}{11}\\\\\\s_s=286.5\\\\\\

The mean and standard deviation for the non-smokers is:

Mean: 30.3

Standard deviation: 50.9

M_n=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M_n=\dfrac{1}{15}(28.6+25.1+26.4+34.9+28.8+. . .+13.9)\\\\\\M_n=\dfrac{453.8}{15}\\\\\\M_n=30.3\\\\\\s_n=\dfrac{1}{n-1}\sum_{i=1}^n\,(x_i-M_n)^2\\\\\\s_n=\dfrac{1}{14}((28.6-30.3)^2+. . . +(13.9-30.3)^2)\\\\\\s_n=\dfrac{713.3}{14}\\\\\\s_n=50.9\\\\\\

Now, we can calculate the coefficient of variation:

CV smokers:

CV_s=\dfrac{s_s}{M_s}=\dfrac{16.9}{43.7}=0.387

CV non-smokers:

CV_n=\dfrac{s_n}{M_n}=\dfrac{7.1}{30.3}=0.234

3 0
4 years ago
The number part of a term is called?
mafiozo [28]

Answer: The number part of a term is called the coefficient.

Step-by-step explanation: I assume you’re referring to a number like this: 3x. In that case, 3 is the coefficient.

6 0
3 years ago
Read 2 more answers
Write the polynomial in standard form.<br> - 4 + 3x - 522
Tatiana [17]

Answer:

3x-526

Step-by-step explanation:

the 3x would go in the beginning. then you subtract (-4-522)= -526.

4 0
3 years ago
HELP ASAP!!! Giving brainliest to whoever answers first!!!
Lady_Fox [76]

Answer:

basically do 23+35+27+48+18+35= 186 then divide it by how many there are (6) = 31 so the answer is 31

7 0
3 years ago
Read 2 more answers
A second-order linear differential equation for y(t) is said to be homogeneous if... every term involve either y or its derivati
swat32

Answer: Hello!

A second order differential equation has the next shape:

y''(t) + p(t)y'(t) + q(t)y(t) = g(t)

where p(t), q(t) and g(t) are functions of t, that can be constant numbers for example.

And is called homogeneus when g(t) = 0, so you have:

y''(t) + p(t)y'(t) + q(t)y(t) = 0

Then a second order differential equation is homogeneus ef every term involve either y or the derivatives of y.

4 0
4 years ago
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