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Triss [41]
3 years ago
15

Suppose that a company claims that its air fresheners last 23 days, on average. You take many large samples, and find, each time

, that the mean number of days of the sample is outside the 95% confidence interval. Based on this information alone, which of the following is probably not the mean number of days that the company's air fresheners last?
A. 19
B. 21
C. 17
D. 23
Mathematics
2 answers:
dlinn [17]3 years ago
5 0

Answer:

23

Step-by-step explanation:


Snowcat [4.5K]3 years ago
5 0

Answer:

Option D is the answer.

Explanation:

A company claims that its air fresheners last 23 days, on average. Many large samples are taken each time it is found that the mean number of days of the sample is outside the 95% confidence interval.

This implies:

23\times0.95=21.85

So, below 21.85 is the probable mean number of days that the company's air fresheners last.

Therefore, 23 is not the mean number of days that the company's air fresheners last.

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Use a calculator to evaluate sec 85°. a:-1.016. b:-5.679. c:1.004. d:11.474
KatRina [158]
The correct answer to this question is this one: "D. 11.474"

your calculator probably doesn't do "secant". But sec is 1/cos
so do cos(85) (in degree mode, not radian mode) then "invert it": 1 / ANS or x^-1 if you have that key

or type
1/cos(85 degrees)= <span>11.4737</span>
7 0
3 years ago
Greta bought three 15-pounds bags of dry dog food.Her dog eats 10 ounces of dry dog food each day.After how many days will Greta
sdas [7]
72 days

there are 720 ounces total (convert 45 pounds to 720 ounces)
divide that by the 10 ounces per day and get 72 days
8 0
3 years ago
Read 2 more answers
Please help the picture is there!
givi [52]

Answer: A

Step-by-step explanation:

r = j + 3

We subtitube r to find j,

r = 9          j = 9 + 3 = 12

r = 15         j = 15 + 3 =18

r = 21         j = 21 + 3 = 24    

And we found A as answes.

7 0
3 years ago
Read 2 more answers
Write the quadratic equation in factored form. Be sure to write the entire equation. x2 - 5x - 24 = 0
Vitek1552 [10]

​x² - 5x - 24 = 0

First, we have to solve the quadratic equation and find the two values of x that fit the equation.​

x =  \frac{5+- \sqrt{5^{2} + 4*1*24 } }{2*1}  =  \frac{5+- \sqrt{25 + 96} }{2} =  \frac{5+- \sqrt{121} }{2}  =  \frac{5+-11}{2}​

There are two values of x that fit:​

x₁ = (5+11)/2 = 16/2 = 8​

x₂ = (5-11)/2 = -6/2 = -3​

Now I can restate the original equation in terms of a product of factors, with this product being equal to zero:​

(x - x₁) * (x - x₂) = 0​

ANSWER ​(x-8) * (x+3) = 0

Now I can solve each factor by setting each one equal to zero and solving the resulting linear equations:​

x - 8 = 0 or x + 3 = 0​

x = 8 or x = -3​

We can check that these two values are the solution to the original quadratic equation.​

x² - 5x - 24 = 0​

​First value

​8² -5*8 -24 = 0

64 - 40 -24 = 0​

0 = 0 ¡Checked!​

Second value​

(-3)² -5(-3) -24 = 0​

9 + 15 -24 = 0​

0 = 0 ¡Checked!​

​Hope this helps!

​\textit{\textbf{Spymore}}​​​

8 0
3 years ago
Create your own story problem ill give 100 points
Viktor [21]

Answer:

Step-by-step explanation:

8 0
3 years ago
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