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saw5 [17]
3 years ago
12

The rectangular floor of a classroom is 40 feet in length and 32 feet in width. A scale

Mathematics
1 answer:
m_a_m_a [10]3 years ago
5 0

Answer:

82 inches

Step-by-step explanation:

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Problem 1.(32 points) A random sample of 100 Uber rides in Chicago has on average 5.4miles per ride. Assume the distribution of
marshall27 [118]

Answer:

a) CI = ( 5,1 ; 5,7 )

b) SE =  0,1  

Step-by-step explanation:

a) Sample random     n  = 100

Mean  =  μ = 5,4

Standard deviation   s = 1,3

CI = 99 %    α = 1 %   α = 0,01     α/2 =  0,005

z(c) for  0,005 is from z-table    z(c)  = 2,575

z(c)  =  ( X - μ ) /s/√n          CI  =  μ ± z(c) * s/√n

CI =  5,4 ± 2,575* 1,3/10

CI = 5,4 ± 0,334

CI = ( 5,1 ; 5,7 )

b) SE = Standard deviation / √n

SE = 1,3 /10       SE =  0,1  

We can support that with 99 % of probability our random variable will be in the CI.

6 0
3 years ago
J is located at (2,7) , q is located at (5,12) and m is located at ((x,y)
Flauer [41]

Answer:

don't know how to do sorry for that but i can tell me how to.do

Step-by-step explanation:

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5 0
3 years ago
If x and y satisfy both 9x+2y=8 and 7x+2y=4, then y=?
Alex

Answer:

The value of y is -5

Step-by-step explanation:

we have

9x+2y=8 ------> equation A

7x+2y=4 ------> equation B

we know that

If x and y satisfy both equations, then (x,y) is the solution of the system of equations

Using a graphing tool

Remember that

The solution of the systems of equations is the intersection point both graphs

The intersection point is (2,-5)

therefore

The solution of the system of equations is the point (2,-5)

The value of y is -5

7 0
3 years ago
Really need help
Ket [755]
3n - 80 = 5n + 8\\3n=5n + 88\\ -2n = 88\\\\ n = -44
4 0
3 years ago
Which choice shows that “What was the purpose of the Inca’s strange strings?” Is a persuasive text?
podryga [215]

Answer:

c

Step-by-step explanation:

6 0
3 years ago
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