In the workbench​ drawer, the ratio of hex bolts to all bolts is 0.26. Write the ratio as a fraction in simplest form. As a​ fraction, the ratio of hex bolts to all bolts is

Answers

Answer 1
Answer:

Answer:

  13/50

Step-by-step explanation:

0.26=(26)/(100)=(2\cdot 13)/(2\cdot 50)=(13)/(50)


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What is the height of this cone?

Answers

Answer:

height is = 3/2 ft

Step-by-step explanation:

a cones volume can be represented by 1/3(h)(pi)(r^2)

we must go backwards to find this question out

if the diameter is 2/3 then the radius is 1/3

then you must square that

that is 1/3 * 1/3 which is 1/9

1/9(1/3)(pi)(h) is 1/18(pi)

we can remove pi from both sides and multiply the 1/9 and the 1/3

1/27(h) = 1/18

we must find the lcm or least common multiple to figure this out

the lcm is 54

1/27 is essentially 2/54 and 1/18 is 3/54

2/54(h) = 3/54

we can multiply each side by 54

2h = 3

divide 2 on both sides

h is 3/2

4. You have a deck of 40 number cards: five of each number 2 to 9. You shuffle the deck, pick a card, look at it, return it to the deck, and then repeat for a second card. Determine each theoretical probability. a) sum is 12 b) difference is less than 5 c) product is odd​

Answers

To determine the theoretical probabilities, we'll analyze the different possible outcomes for each case.

Total number of cards = 40 (5 cards for each number from 2 to 9)

a) Sum is 12:

There are several combinations of cards that can result in a sum of 12:

  • 3 and 9
  • 4 and 8
  • 5 and 7
  • 7 and 5
  • 8 and 4
  • 9 and 3

Total favorable outcomes = 6 (since there are 6 possible combinations)

Total possible outcomes (since you're drawing two cards) = 40 * 40 = 1600

Probability (sum is 12) = (Number of favorable outcomes) / (Total possible outcomes)

Probability (sum is 12) = 6 / 1600 = 0.00375

b) Difference is less than 5:

There are several combinations of cards that can result in a difference less than 5:

  • 2 and 3
  • 3 and 2
  • 3 and 4
  • 4 and 3
  • 4 and 5
  • 5 and 4
  • 5 and 6
  • 6 and 5
  • 6 and 7
  • 7 and 6
  • 7 and 8
  • 8 and 7
  • 8 and 9
  • 9 and 8

Total favorable outcomes = 14

Total possible outcomes = 1600

Probability (difference is less than 5) = 14 / 1600 = 0.00875

c) Product is odd:

For the product to be odd, one or both of the numbers drawn must be odd. Since there are five odd numbers (3, 5, 7, 7, 9), and each number has five cards, the total number of favorable outcomes is 5 + 5 + 5 + 5 + 5 = 25.

Total possible outcomes = 1600

Probability (product is odd) = 25 / 1600 = 0.015625

To summarize:

  • a) Probability (sum is 12) ≈ 0.00375
  • b) Probability (difference is less than 5) ≈ 0.00875
  • c) Probability (product is odd) ≈ 0.015625

Suppose you buy a new car whose advertised mileage is 23 miles per gallon​ (mpg). After driving your car for several​ months, you find that its mileage is 19.4 mpg. You telephone the manufacturer and learn that the standard deviation of gas mileages for all cars of the model you bought is 1.07 mpg. A. Find the​ z-score for the gas mileage of your​ car, assuming the advertised claim is correct.
B. Does it appear that your car is getting unusually low gas​mileage?

Answers

Answer:

B.

Step-by-step explanation:

A.

mu = population mean = advertised mean = 23

x = raw score = 19.4

sigma = population standard deviation = 1.07

z = (x - mu)/sigma

z = (19.4 - 23)/1.07

z = -3.36448598130841

z = -3.36

=======================================

B.

The general rule is that if -2 \le z \le 2, then the z score is not unusual. Otherwise, it is unusual.

Since z = -3.36 falls outside the range, the car is getting unusually low gas mileage.

Can somebody PLEASE help meIn a SRS of 80 teenagers, the average number of text messages received per day is found to 50. If the standard deviation of number of texts received is known to be σ = 12, find the 95% confidence interval for the number of text messages received.

Answers

To solve this problem you have to find out what the value of +/- Z is that encloses 95% of the area under the normal distribution curve. For this you can use this formula: Please see the attached image.

Find the upper and lower limits of x, corresponding to +Z and -Z respective.

I hope this helps, Regards.

What is artificial intelligence

Answers

exhibited by machines or other softwares.

It's a man made intelligence

Two studies were completed in California. One study in northern California involved 1,000 patients; 74% of them experienced flulike symptoms during the month of December. The other study, in southern California, involved 500 patients; 34% of them experienced flulike symptoms during the same month. Which study has the smallest margin of error for a 98% confidence interval?The northern California study with a margin of error of 3.2%.
The southern California study with a margin of error of 3.2%.
The northern California study with a margin of error of 4.9%.
The southern California study with a margin of error of 4.9%.

Answers

The right answer for the question that is being asked and shown above is that: "The southern California study with a margin of error of 4.9%." the study has the smallest margin of error for a 98% confidence interval is that The southern California study with a margin of error of 4.9%.