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Stella [2.4K]
2 years ago
13

23 The value in dollars, y, of a carx years after it was purchased can be modeled by

Mathematics
1 answer:
frozen [14]2 years ago
8 0
A because the y intercept is the staring point
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A cookie factory monitored the number of broken cookies per pack yesterday.
trapecia [35]

Answer:

Confidence Interval - 2.290 < S < 2.965

Step-by-step explanation:

Complete question

A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of 50 cookies. The mean is 23.33 and the standard deviation is 2.6. Construct a 80% confidence interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies.

Solution

Given  

n=50

x=23.33

s=2.6

Alpha = 1-0.80 = 0.20  

X^2(a/2,n-1) = X^2(0.10, 49) = 63.17

sqrt(63.17) = 7.948

X^2(1 - a/2,n-1) = X^2(0.90, 49) = 37.69

sqrt(37.69) = 6.139

s*sqrt(n-1) = 18.2

s\sqrt{\frac{n-1}{X^2 _{(n-1), \frac{\alpha }{2} } } \leq \sigma \leq s\sqrt{\frac{n-1}{X^2 _{(n-1), 1-\frac{\alpha }{2} } }

confidence interval:

(18.2/7.948) < S < (18.2/6.139)

2.290 < S < 2.965

8 0
3 years ago
What is the equation of the line through (-6, -5) and (-4, -4)?
Norma-Jean [14]

Answer:

  y = 1/2x -2

Step-by-step explanation:

The 2-point form of the equation for a line is useful for answering questions like this.

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1 . . equation of a line through (x1, y1) and (x2, y2)

Filling in the given points, the equation becomes ...

  y = (-4 -(-5))/(-4 -(-6))/(x -(-6)) -5

  y = 1/2(x +6) -5

  y = 1/2x -2

3 0
3 years ago
What is the value of x if x squared = 37/81
HACTEHA [7]

Answer:

x = ±√37/9

Step-by-step explanation:

x² = 37/81

√(x²) = √(37/81)

x = ± √(37)/√(81)

x = ± √37/9

4 0
3 years ago
Sally is selling pies. She wants to earn at least $200 a day. It costs her $50 for materials and the booth rental. She is going
-Dominant- [34]
200-50=150
150/6=25
Sally will have to sell 25 pies to reach her goal.
5 0
3 years ago
a plane left chicago at 8 AM. at 1 PM the plane landed in Los Angles, which is 1500 miles away. what was the average speed of th
zlopas [31]

Answer:300 miles gor every 1 hour

Step-by-step explanation:

Okay so first ot gives you 3 numbers see how many hours is from 8am to 1pm then once you get that number divided it by your miles you will get how many miles will you go per 1 hour

6 0
2 years ago
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