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Tasya [4]
2 years ago
5

Marcus gathered data on the average time it takes for students to get to school each morning. Of all the responses, 10 people sa

id 15 minutes, 18 people said 30 minutes, and 12 people said 25 minutes.
If the standard deviation of the population is 5.64 minutes, what is the 95% confidence interval for the population mean?
Mathematics
1 answer:
sveticcg [70]2 years ago
5 0

Answer:

24.75, 1.75

Step-by-step explanation:

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If I have 3 shoes, 9 Blouses, 8 pants, 11 belts. How many different kind of outfits can I make
Oduvanchick [21]
Well you can make more than 8
6 0
3 years ago
Restrict the domain of the quadratic function and find its inverse. Confirm the inverse relationship using composition. f(x) = 0
ANTONII [103]

The given function is

f(x)= 0.2 x²

Since f(x) will be defined for all real values of x.

So, Domain of f(x) will be ( x| x is a real number.)→This is set builder notation.

Finding the inverse of f(x):

y = 0.2 x²

→ x²= 5 y

→x = \pm\sqrt{5 y}→ → Inverse of f(x)

Replacing x by y and y by x,we get inverse of the given function

y = \pm\sqrt{5 x}→ →Domain x ≥ 0, x∈[0,∞]

Graph of function and its inverse are shown below.

8 0
3 years ago
Read 2 more answers
se vendieron 144 boletos. 2 pesos por adulto y un peso por niño, si se gastaron 207 pesos cuantos boletos de adulto se vendieron
natulia [17]

Answer:

Se vendieron 81 boletos de niños y 63 boletos de adultos.

Step-by-step explanation:

La cantidad de boletos vendidos es igual a:

144 = a + n   (1)

En donde <em>a </em>es por adultos y <em>n</em> por niños

A su vez, el dinero gastado equivale:

207 = 2*a + 1*n   (2)

Resolviendo la ecuación (1) para <em>a:</em>

a = 144 - n   (3)

Introduciendo (3) en la ecuación (2) tenemos:

207 = 2*(144 - n) + n

n = 81

Ahora podemos calcular el numero de boletos de adultos vendidos introduciendo <em>n</em> en la ecuación (3):

a = 144 - n = 144 - 81 = 63

Entonces, se vendieron 81 boletos de niños y 63 boletos de adultos.  

Espero que te sea de utilidad!      

5 0
2 years ago
How many fourths are in two wholes? Use a fraction model to help you. Show two whole divided into four equal pieces. 2 dived by
Nata [24]
There are 8 fourths in 2 wholes. 
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3 years ago
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What are the steps to simplify (5-7i)(-4-3i)?
vekshin1
Add the like terms so (1)(-10i)
3 0
3 years ago
Read 2 more answers
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