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FromTheMoon [43]
2 years ago
7

Twelve different video games showing drug use were observed. The duration times of drug use were​ recorded, with the times​ (sec

onds) listed below. What requirements must be satisfied to test the claim that the sample is from a population with a mean greater than 75 ​sec? Are the requirements all​ satisfied?
86 13 623 50 0 53 198 45 172 0 2 59

What requirements must be​ satisfied? Select all that apply.

A. Either the population is normally​ distributed, or ngreater than​30, or both.

B. The conditions for a binomial distribution must be satisfied.

C. At least one observation must be above or below 75 sec.

D. The sample observations must be a simple random sample.
Mathematics
1 answer:
Amanda [17]2 years ago
4 0

the answer to the question will be c

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I want to purchase a pair of sneakers for the summer. Champs and Footlocker
SCORPION-xisa [38]

Answer:

Champs is 64.8, Footlocker is 64. Footlocker is selling them for cheaper. You would go to Footlocker, as it's .8 off.

7 0
3 years ago
F(x) = 2x^2 − 3x − 5 Part
riadik2000 [5.3K]

Answer:  Answer  is in the steps..

Step-by-step explanation:

f(x)= 2x^{2} - 3x -5        

A) To find the x intercepts of a parabola we have to set the whole equation equal zero because the x intercept is when y equal zero in other words where f(x) equal zero.

 2x^{2}  - 3x - 5 = 0     Now solve using quadratic formula.

  x = -b±\frac{\sqrt{b^2 -4ac } }{2a}    

  x = 3 ± \sqrt{9+40} /2a  

   x = 3 ± \sqrt{49}  / 2a

   x= 3 ± 7 /4

   x= -1   or x = 5/2  

The x intercepts are  (5/2,0)  and (-1,0)

   

B)  The graph vertex of the graph of f(x)  is going to be at a minimum because the leading coefficient of the function has a positive integer which means the parabola will open up and its vertex will be at the minimum point.

 Using the  x coordinates  we could find their average and find the x coordinate of the   vertex.

\frac{5}{2} + -\frac{1}{1}  =  \frac{3}{2} / \frac{2}{1} = 3/4  

The x coordinate of the vertex  is 3/4 so we will input that into the equation and solve for the y coordinate  

2(\frac{3}{4})^2 - 3 (\frac{3}{4}) - 5   = 18/16 - 9/4 -5  =  -49/8

The y coordinate of the vertex  is  -49/8

So the vertex is (3/4, -49/8)  

C)   First  I will graph the vertex and then graph he two x intercepts and connect then like a U shape.

5 0
3 years ago
Which statement about the rates of changes of Functions A and B as shown is true?
Phoenix [80]

Answer: function b has a greater rate of change

7 0
3 years ago
20 points!! I need help
zaharov [31]

Answer:

11.33 * 16.33 meters to the nearest hundredth.

Step-by-step explanation:

Let the width of the pool be x meters, then the length is x+5 meters.

The length of whole area = x + 5 + 2(3)  = x + 11 meters and the width is

x + 2(3) = x + 6 meters.

So we have the equation (x + 6)(x + 11) = 387.

x^2 + 17x + 66 = 387

x^2 + 17x - 321 = 0

x =  [-17 +/- sqrt (17^2 - 4*1*-321)] / 2

x = 11.33 meters

So the width is 11.3 m and the length is 16.33 meters.

4 0
3 years ago
Ramon earns $1,640 each month and pays $53.60 on electricity. To the nearest tenth of a percent, what percent of Ramon's earning
Pavel [41]

Answer:

I need points sorry for this

4 0
2 years ago
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