1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alexeev081 [22]
3 years ago
9

The length of a screw produced by a machine is normally distributed with a mean of 0.75 inches and a standard deviation of 0.01

inches. what percent of screws are between 0.72 and 0.78 inches? (1 point 68% 75% 99.7% 100%
Mathematics
2 answers:
Soloha48 [4]3 years ago
7 0

Answer: There is 99.7% of screws are between 0.72 and 0.78 inches.

Step-by-step explanation:

Since we have given that

Mean = 0.75 inches

Standard deviation = 0.01 inches

Since the length of a screw produced by a machine is normally distributed.

So, We need to find the percent of screws are between 0.72 and 0.78 inches.

Since we have that

P(0.72

And we know that

z=\frac{X-\mu}{\sigma}

So, it becomes,

P(\frac{0.72-0.75}{0.01}

Hence, there is 99.7% of screws are between 0.72 and 0.78 inches.

White raven [17]3 years ago
6 0
99.7%
You can use normalCdf(.72,.78,.75,.01) to find the answer or if you standardize your numbers (z scores) normalCdf(-3,3,0,1).
You might be interested in
What ratios are equivalent to 5/9
NNADVOKAT [17]

Answer:

10/18 and 20/36

Step-by-step explanation:

5 0
2 years ago
ASAP GUYS PLEASE I NEED UR HELP THIS IS SO HARD<br> Solve: 5 − 7 ( z + 1 ) = 7 ( − 9 − 3 z )
pantera1 [17]

Answer:

-\frac{61}{14}

Step-by-step explanation:

Question: 5 - 7(z+1) = 7(-9-3z)

We multiply the number in front of the bracket first, since that is multiplication.

--> 5 -7z -7 = -63 - 21z

--> -7z -2 = -63 - 21z

Now, we move all the z and all the numbers to each side.

--> -7z +21z = -63 +2

--> 14z = -61

--> z = -61/14

This cannot be simplified further, so z is -61/14.

6 0
1 year ago
Read 2 more answers
The picture shows the footprints of a man walking. The pace length P is the distance between the rear of two consecutive footpri
Rina8888 [55]

Bernard’s walking speed is 140 meters per minute

Bernard’s walking speed is 8.4 kilometers per hour

Step-by-step explanation:

The pace length P is the distance between the rear of two consecutive footprints

The formula, n P = 140, gives an approximate relationship between n and P where,

  • n = number of steps per minute
  • P = pace length in meters
  • Bernard knows his pace length is 0.80 meters
  • The formula applies to Bernard’s walking

We need to calculate Bernard’s walking speed in meters per minute and in kilometers per hour

∵ n = number of steps per minute

∴ n unit is number / minute

∵ P = pace length in meters

∴ P unit is meter

- That means n P unit is meters/minute

∴ n P represents the speed in meters per second

∵ The formula applies to Bernard’s walking

∵ His pace length is 0.80 meters

∵ n P = 140

∴ n(0.8) = 140

- Divide both sides by 0.8

∴ n = 175

- That means he moves 175 steps per minute

∵ The distance he walks in minute = 175 × 0.8 = 140 meters/minute

∴ His speed is 140 meters per minute

Bernard’s walking speed is 140 meters per minute

∵ 1 km = 1000 m

∵ 1 hour = 60 minutes

- Divide the meters by 1000 and the minute by 60 to change

   from meters per minute to kilometers per hour

∴ His walking speed = \frac{140}{1000} ÷ \frac{1}{60}

- Change ÷ to × and reciprocal the fraction after the division sign

∴ His walking speed =  \frac{140}{1000} × \frac{60}{1} = 8.4 km/h

Bernard’s walking speed is 8.4 kilometers per hour

Learn more:

You can learn more about the speed in brainly.com/question/5461619

#LearnwithBrainly

7 0
3 years ago
Which set of ordered pairs could be generated by an exponential function?
Leya [2.2K]

Answer:

(3,1) +(1,6)

Step-by-step explanation:

first yiu

3 0
3 years ago
Read 2 more answers
To earn an A in an algebra course, a student must have a test average of at least 90. Mary has grades of 95, 82, 88 on her first
Fofino [41]

Answer: Mary need to make at-least 95 on her fourth test to earn an A in her algebra course.

Step-by-step explanation:

Let x be the grades scored by Mary in the fourth algebra test.

Mary has grades of 95, 82, 88 on her first three algebra tests.

Then, the combined scores in four test will become = 95+82+88+x =  265+x

Average score = (Sum of all scores) ÷ (Number of tests)

=\dfrac{265+x}{4}

As per given ,

To earn an A in an algebra course, a student must have a test average of at least 90.

i.e. Average score ≥ 90

\Rightarrow\ \dfrac{265+x}{4}\geq90\\\\\Rightarrow\ 265+x\geq 90\times4=360\\\\\Rightarrow\ x\geq360-265 =95\\\\\Rightarrow\ x\geq90

Hence, Mary need to make at-least 95 on her fourth test to earn an A in her algebra course.

5 0
3 years ago
Other questions:
  • Jose wanted to make a graph to show his budget for the month. What type of graph would be the most appropriate to graph for Jose
    14·1 answer
  • What is the place and the value of 2.195
    5·1 answer
  • Which equation represents the data shown in the table below?
    5·1 answer
  • Eliminate the parameter.<br><br> x = 7t, y = t + 4
    11·2 answers
  • I really need this pls helppp
    13·2 answers
  • The Williams family goes shopping, and spend $95.00. They have a coupon for 20% off and the sales tax is 8%. What is the total c
    9·1 answer
  • A system of equations is shown below.
    14·1 answer
  • Suppose you are interested in investigating the wage gender gap using data on earnings of men and women. Which of the following
    14·1 answer
  • How many 6 digit pin numbers are possible if the digits are repeated?
    5·2 answers
  • The length of a rectangle is 1 cm more than three times its width. If the perimeter is 38 cm, what are the dimensions of the rec
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!