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DedPeter [7]
3 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]3 years ago
5 0

Answer:

B

Step-by-step explanation:

Edge 2022

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Find the number of squares given in the picture below.
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Answer:

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Step-by-step explanation:

7 0
3 years ago
Using technology, determine the quarterly payment on a 4 year loan of $16,231 at 5.1% compounded quarterly. Round your answer to
pishuonlain [190]

Answer:

  $1,127.86

Step-by-step explanation:

The amortization formula is ...

  A = Pr/(1 -(1+r)^-n)

where A is the payment amount, P is the principal amount, r is the interest rate per period, and n is the number of periods.

Here, we have P=$16,231, r=0.051/4=0.01275, n=4·4=16.

So, the payment is ...

  A = $16,231·0.01275/(1 -1.01275^-16) = $1,127.86

The quarterly payment amount is $1,127.86.

8 0
3 years ago
Read 2 more answers
A) 4230 can be divided evenly by 2, 5, and 10. How do you know?
Naily [24]

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i farted in class (thanks for the free clout tho)

Step-by-step explanation:

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8 0
3 years ago
Find the values of x,y,z. This diagram is not a scale.
Serjik [45]

Important:
                             The sum of the three angles inside
                              every triangle is always 180°.


First, look at the left triangle alone.
Two of its angles are 46° and 58° .  (46° + 58° ) = 104°
That leaves (180° - 104° ) = 76° degrees for the third angle.
The third angle in that triangle is 'x'. 
                                                         x = 76° .

At the point where 'x' and 'z' come together:
'x' and 'z' are a "linear pair".
Placed side-by-side, they form a straight line.
So (x + z) = 180° .
But  x = 76°.
So z = (180° - 76°).              z = 104° .

Now look at the the skinny triangle on the right alone.
The angle at the top is 13°, and  z = 104°. 
(13° + 104°) = 117° . 
That leaves (180° - 117°) = 63° for the third angle.
'y' is the third angle.
                                                 y = 63° .

3 0
3 years ago
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Step c makes the most sense
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