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3 years ago

What is the answer to this problem

Mathematics

1 answer:

madam [21]3 years ago

4 0

Please take another photo of this problem sheet and share it, showing the problem statement right side up. Next, please do as much as you can on the first part of this problem. Then I'd gladly comment on your work. If you can't do that, then at least ask questions the answers to which might help you get started.

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The specification for the length of a bolt is 4.75 inches. A machinist makes a bolt that is 4.769 inches long. What is the perce

Serhud [2]

Answer:

0.4%.

Step-by-step explanation:

Given that,

The length of a bolt is 4.75 inches and a machinist makes a bolt that is 4.769 inches long.

We need to find the percent error of the bolt’s length. The percentage error in the any value is given by :

$\%=\dfrac{|\text{original value-calculated value}|}{\text{original value}}\times 100\\\\=\dfrac{4.75 -4.769 }{4.75}\times 100\\\\=0.4\%$

So, the percentage error of the bolt's length is 0.4%.

5 0

3 years ago

Mr. Taylor's 4th grade class uses Skittles to learn about probability. They open several randomly selected bags of Skittles and

kap26 [50]

Answer:

The skitties are not evenly distributed by colour

Step-by-step explanation:

Given that Mr. T aylor's 4th grade class uses Skittles to learn about probability. They open several randomly selected bags of Skittles and sort and count the different colors and want to determine if Skittles are evenly distributed by color.

$H_0: Skitties are equally distributed\\H_a: atleast two are not equally distributed$

(Two tailed chi square test)

If all are equally distributed then expected values would be equal to 420/5 =104

Observed Red Orange Yellow Purple Green Total

107 101 87 115 10 420

Expected 104 104 104 104 104 420

Chi square 0.0865 0.0865 2.7788 1.16345 84.9615 89.0769

Chi square is calculated as (obs-exp)^2/exp

Total chi square = 89.0769

df = 4

p value = <0.00001

Reject null hypothesis

The skitties are not evenly distributed by colour

3 0

3 years ago

Nadia built a robot to filter air and water efficiently. She expects the robot to filter more than 343 liters of air and water w

chubhunter [2.5K]

12A+8W > 343 represents the number of minutes the robot filters air A and water W to filter more than 343 liters of air and water.

If the robot filters air for 20 minutes and water for 15 minutes, plugging A as 20 and W as 15, let us check if the equation is true or not.

Checking left side:

12A + 8W = 12(20) +8(15)

240+ 120 = 360

Checking right side: 343

12A+8W > 343

360>343

True.

So the robot meets the first expectation.

Let us check for second equation:

3A+4W < 49

Left side : 3A +4W = 3(20) +4(15) = 60 +60 =120

Right side is 49

comparing left and right side:

3A+4W < 49

120<49

False.

So the robot does not meet the second expectation.

5 0

3 years ago

Read 2 more answers

At 4 p.m., the temperature started to change drastically. Each hour, for three hours, the temperature decreased by 7°F. Which wo

ivolga24 [154]

The answer is decreased. the statement "the temperature decreased by 7 degrees indicates that a negative interger should be used

6 0

3 years ago

Read 2 more answers

Badwater Basin, California, has the lowest elevation in North America. It is 279 feet below sea level. New Orleans, Louisiana, i

SVETLANKA909090 [29]

Answer:

272 feets

Step-by-step explanation:

Badwater Basin = 279 feets below sea level = - 279 feets (relative to sea level)

New Orleans = 7 feets below sea level = - 7 feets (relative to sea level)

Hence,

New Orleans is higher Than Badwater Basin by :

279 feets - 7 feets

= 272 feets

4 0

3 years ago