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Post New Question
All Questions
+0
229306 Questions
+1
972
1
+10
Help plz
The lengths of turtles in a park are normally distributed with a mean of 23.2 inches and a standard deviation of 5.6 inches. What is the percentile rank of a turtle whose length is 15 inches?
4%
7%
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Bigtruss
Feb 17, 2020
+1
901
1
+10
Need help on this please
In a standard normal distribution, above which Z score do approximately 59% of the Data lie?
1.74
0.23
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Bigtruss
Feb 17, 2020
0
870
1
+509
question
Scores on a standardized test are normally distributed with a mean of 550 and a standard deviation of 45.
Approximately what percent of students scored between 560 and 580?
16%
25%
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kikidylm
Feb 17, 2020
0
989
1
+509
need help
Heights of certain plants at a nursery are normally distributed with a mean of 60.7 centimeters and a standard deviation of 8.3 centimeters. If their z-scores are greater than 2.75, the plants are displayed in the main lobby.
To the nearest centimeter,
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kikidylm
Feb 17, 2020
-1
468
1
help its due rn
The midpoints of a regular hexagon are connected to form a smaller hexagon. The small hexagon has perimeter $2\sqrt{3}.$ What is the perimeter of the large hexagon?
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Guest
Feb 17, 2020
0
1
511
1
help
A picture 8 inches by 12 inches is placed in a frame of uniform width. If the area of the frame equals the area of the picture, find the width of the frame
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Guest
Feb 17, 2020
-1
993
1
+155
help
The number of peanuts in bags is normally distributed with a mean of 193.8 peanuts and a standard deviation of 4.1 peanuts.
What is the z-score of a bag containing 185 peanuts?
−2.47
−2.15
−1.90
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jj88778
Feb 17, 2020
-1
736
4
+155
help please
For the probability distribution shown, what
is p(3 < x < 6) ?
0.25
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jj88778
Feb 17, 2020
0
653
1
help
A bag contains 7 red, 5 orange, and 6 green jellybeans. What is the probability of reaching into the bag and randomly withdrawing 12 jellybeans such that the number of red ones is 6, the number of orange ones is 4, and the number of green ones is 2?
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Guest
Feb 17, 2020
0
1218
1
+509
Which variable has a binomial distribution?
Which variable has a binomial distribution?
When grapes are drawn, with replacement, from a mixed bag of seeded and seedless grapes, X is the number of seedless grapes in 3 draws.
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kikidylm
Feb 17, 2020
0
803
1
What is the expected value of X?
What is the expected value of X?
X 0 4 8 12 16
P 0.15 0.25
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geno3141
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Guest
Feb 17, 2020
0
1160
1
question
The probability distribution histogram shows the number of trees in yards in a certain neighborhood.
What is the probability that a randomly selected yard will have 6 or more trees?
read more ..
geno3141
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Guest
Feb 17, 2020
+1
1296
1
+509
need help
Which table shows the probability distribution for spinning the spinner one time?
X 0 1
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kikidylm
Feb 17, 2020
0
1534
1
Anna uses 15 cups of orange juice when she makes fruit punch. Each pitcher of punch contains 15/4 cups of orange juice. How many
Anna uses 15 cups of orange juice when she makes fruit punch.
Each pitcher of punch contains 15/4 cups of orange juice.
How many pitchers of punch does she make?
AnimalMaster
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Guest
Feb 17, 2020
0
1586
1
please help
A man standing on the roof of a building 56.0 feet high looks down to the building next door. He finds the angle of depression to the roof of that building from the roof of his building to be 34.6°, while the angle of depression from the roof of his building
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Guest
Feb 17, 2020
-1
670
1
+208
parts of speech
Creatures that are very sensitive to the changes in the air before a storm can “predict” a change in the weather. Birds, for example, sense the pressure change and fly lower. Low-flying birds, then, indicate that rain is coming. Similarly, houseflies detect
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monkeyree1124
Feb 17, 2020
0
626
1
help me with it!!!
In an arithmetic sequence, the 7th term is 30, and the 11th term is 60. What is the 21st term of this sequence?
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Guest
Feb 17, 2020
0
2204
1
help
Quadrilateral PQRS is a square whos side length is 10. Let X and Y be points outside the square so that XQ = YS = 6 and XP = YR = 8. Find XY^2.
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Guest
Feb 17, 2020
0
679
1
help
Medical researchers believe that the probability of getting lung cancer if a person smokes is 0.34. The probability that a nonsmoker will get lung cancer is 0.03. It is also known that 11% of the population smokes. What is the probability that a person
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Guest
Feb 17, 2020
0
706
2
+296
Polynomial Help, thanks :D
Find a monic polynomial of degree in with rational coefficients such that is a root of the polynomial.
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EpicWater
Feb 17, 2020
0
681
4
help plzzzzz
Eighty cards are numbered with a different number from 1 to 80. One card is removed and the numbers on the remaining cards are added. The result is a multiple of 32. Find the sum of the possible numbers that could have been on the removed card.
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Guest
Feb 17, 2020
0
784
1
+448
Need help with this word problem(Calculate percentage) PLzZ!!
Nina is a small business owner who took over their family store in 2003. The store, which was originally opened in 1993, sells all types of clothes and apparel in her hometown. Later, in 2008, Nina joined Shopify as an online merchant. She began selling
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bioplant
Feb 17, 2020
0
908
1
help
On the average, only 1 person in 1000 has a particular rare blood type.
a) Find the probability that, in a city of 10,000 people, no one has this blood type.
b) How many people would have to be tested to give a probability greater than 1/2
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Guest
Feb 17, 2020
0
717
1
need help
A cabin cruiser traveling with the current went 12 mi in 1 h. Traveling against the current, it took 2 h to go the same distance. Find the rate of the cabin cruiser in calm water and the rate of the current
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Guest
Feb 17, 2020
0
766
1
probability
Bowl A contains three red and two white chips, and bowl B contains four red and three white chips. A chip is drawn at random from bowl A and transferred to bowl B. Compute the probability of then drawing a red chip from bowl B.
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Guest
Feb 17, 2020
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