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erik [133]
3 years ago
14

Fred is constructing a 95% confidence interval to estimate the average length (in minutes) of movies he watches. His random samp

le of 15 movies averaged 114 minutes long with a standard deviation of 11 minutes. What critical value and standard error of the mean should he use?
Mathematics
1 answer:
sergejj [24]3 years ago
5 0
Like what we suppose to do

like adding all together??????????
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Find u in terms of m,g and v in this equation E = m/2g(v²-u²)<br>​
igor_vitrenko [27]

Step-by-step explanation:

E = m/2g(v²-u²)

2g×E = 2g×m/2g(v²-u²)

2Eg = m(v²-u²)

2Eg = mv² - mu²

mu²= mv² -2Eg

mu²/m = mv² -2Eg /m

u²= v² -2Eg

u = √v²-√2Eg

3 0
3 years ago
Challenge to all the maths lover
RoseWind [281]
Point(-5,3) after the 2 reflections would become (3,-5)

point (4,-2) after the 2 reflections becomes (2,4)
6 0
3 years ago
-50 POINTS- please help
e-lub [12.9K]

Answer:

-13

-10

Step-by-step explanation:

A x = B

To find X

A ^ -1 A  x = A ^ -1 B

x = A^ -1 B

x = -3/2  -5/2      2

     -1       -2         4

Across times down

-3/2 * 2 + -5/2 *4 = -13

-1 *2 -2 * 4 = -10

The matrix is

-13

-10

7 0
4 years ago
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It costs $2.80 to make a sandwich at the local deli shop. To make a profit, the deli sells it at a price that is 170% of the cos
Natali [406]
I think the sandwich should sell for $7.56. 
5 0
3 years ago
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50 PTS! NEED HELP NOW!
nordsb [41]

Answer:

maybe its just me but I cant see it :( blurry

Step-by-step explanation:

4 0
3 years ago
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