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yaroslaw [1]
3 years ago
7

Marta can clean a house in 1 hours. It takes her daughter 1 hr and 30 mins to vacum the house. How long would it take if they wo

rled together?
Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Easy! 1 hour - 1 hour and 30 minutes = 30 minutes(together)

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Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value u
Alenkasestr [34]

Answer:

The  value is  1.75 \  and  \   -1.75

Step-by-step explanation:

From the question we are told that

     The null hypothesis is  H_1 :  \mu \ne 3.24

     The level of significance is  \alpha = 0.08

From the z table  the critical value of  \alpha considering the two tails of the normal  curve( This is because this a two tailed test ) is

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Hence the critical value is  

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5 0
3 years ago
Plz help me with this question
irga5000 [103]

Answer:

122

Step-by-step explanation:

x^6+y^2

Plug in 1 for x and 11 for y

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I hope this helps!

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8 0
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