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DedPeter [7]
2 years ago
8

David conducts his own study. He selects a random sample of 50 students and asks if they are getting 9 hours of sleep per night.

Thirty of the 50 students are not getting enough sleep.
Does David’s sample result provide convincing evidence that more than 50% of all students at the school are not getting enough sleep?

Mathematics
1 answer:
mrs_skeptik [129]2 years ago
5 0

Answer:

B

Step-by-step explanation:

Edge 2022

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I’ve been trying to figure out this question on my homework and I’ve been confused for days now.
dsp73

Answer:

18m^12n^3

Hope this helps!!

Step-by-step explanation:

4 0
2 years ago
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Solve |3k-2|=2|k+12|
Stella [2.4K]

Answer:

k = 26   or   k = -\dfrac{22}{5}

Step-by-step explanation:

|3k - 2| = 2|k + 12|

\dfrac{|3k - 2|}{|k + 12|} = 2

|\dfrac{3k - 2}{k + 12}| = 2

3k - 2 = 2(k + 12)   or   3k - 2 = -2(k + 12)

3k - 2 = 2k + 24   or   3k - 2 = -2k - 24

k = 26   or   5k = -22

k = 26   or   k = -\dfrac{22}{5}

7 0
3 years ago
Can you please help me solve thanks step by step
shusha [124]

Answer:

40 degrees

Step-by-step explanation:

We know the entire angle of ABD is 70 and CBD and ABC are in it.

Since we know one of them (CBD) is 30, we can subtract 30 from 70 to find ABC. This is because the angle of ABC and CBD equal ABD.

30 + x = 70

-30 from both sides

x = 40

6 0
3 years ago
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Nathaniel was given a large box of 24 chocolates for his birthday. If he
Alik [6]
24 - (2 x 8)
24 - 16 = 8
7 0
2 years ago
The function f(x)=30+0.25x/x yields the average cost in dollars per cup of lemonade made by Lincoln at his lemonade stand when h
trapecia [35]

The answer is C: Lincoln uses 25 cents worth of supplies per cup.

8 0
3 years ago
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