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ehidna [41]
3 years ago
15

Evaluate 15k when k=3

Mathematics
2 answers:
seraphim [82]3 years ago
6 0
For this you simply plug in a 3 wherever you see k so it would be 15(3) which is 45. Hope this helps!
monitta3 years ago
3 0

if k=3 than 15k    (5 mutiple k) 5*3=45

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The General Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours
DerKrebs [107]

Answer:

Yes, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

Step-by-step explanation:

H0 : σ² = 2.66²

H1 : σ² < 2.66²

X²c = (n - 1)*s² ÷ σ²

sample size, n = 40

Sample standard deviation, s = 1.9

X²c = ((40 - 1) * 1.9²) ÷ 2.66²

X²c = 140.79 ÷ 7.0756

X²c = 19.897

Using a confidence level of 95%

Degree of freedom, df = n - 1 ; df = 40 - 1 = 39

The critical value using the chi distribution table is 25.6954

Comparing the test statistic with the critical value :

19.897 < 25.6954

Test statistic < Critical value ; Reject the Null

Hence, we can conclude that the population standard deviation of TV watching times for teenagers is less than 2.66

8 0
3 years ago
The radius of a circle is 7 cm what is the area
Anna007 [38]

Answer:

153.94 cm²

Step-by-step explanation:

Area of circle = πr² = π(7)² = 49π = 153.94 cm²

7 0
3 years ago
Read 2 more answers
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love history [14]

Answer:

What's the question for the options?

6 0
3 years ago
Helppppppppppppppppppp I’ll mark you brainlist don’t respond if you’re going to put something random I will report you :)
Basile [38]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
As a contestant on a televised game show, Daniel gets to spin the big prize wheel, which has a diameter of 4 meters. What is the
shusha [124]
Area of a circle = pir^2
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8 0
3 years ago
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