# Posts by sharon

Total # Posts: 868

1. ### statistics

According to Chebyshev's theorem, what proportion of a distribution will be within k = 4 standard deviations of the mean? Show all work as to how to find this.
2. ### statistics

I am unsure. This is how the question was worded.
3. ### statistics

In the formula ? (x – µ)^2/n for the variance, in what cases would we divide by n-1 instead of n?
4. ### Math

What are the general formula for the sequence 1,4,9,16
5. ### Physics

Types of thermometer
6. ### statistics

You have been asked to do a survey of student satisfaction with MyMathLab courses at South University. Describe how you would obtain a sample of these types: stratified and simple random
7. ### statistics

A cereal manufacturer seeks to test their newest product against a competitor’s. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the technicians serving them, were aware of the ...
8. ### statistics

When a parachute is inspected, the inspector is looking for anything that might indicate the parachute might not open. - State the null and alternative hypotheses for this situation.
9. ### statistics

If the critical values of a hypothesis test are +2.58 and -2.58, what would be the critical regions?
10. ### Microbiology

. If you counted 20 colonies from a 0.01-ml inoculum of a 1:10 dilution of urine, how many organisms per milliliter of specimen would you report? Is this number significant?
11. ### statistics

if you counted 20 colonies from 0.01-ml inoculum of a 1:10 diulation of urine, how many organisms per milliliter of speciman would you report? Is this number significant
12. ### statistics

The Maximum Error of Estimate is exactly equal to half of the width of the confidence interval. T-F, and why or why not?
13. ### statistics

? Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following pairs of z-values. ? z = 0 to z = 2.10 ? X
14. ### statistics

Please help. I have no idea what I am doing Use the standard normal (z score) table to find: P(-1.00 ? z) & Find the probability that a data value picked at random from a normal population will have a standard score (z) that lies between the following pairs of z-values. z = 0 ...
15. ### statistics

A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two. Explain why x is a binomial random variable. & For the first question about the ...
16. ### statistics

A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two. Explain why x is a binomial random variable
17. ### statistics

You have been asked to do a survey of student satisfaction with MyMathLab courses at South University. Describe how you would obtain a sample of these types: stratified and simple random.
18. ### statistics

Please help. I have no idea how to do thisA cereal manufacturer seeks to test their newest product against a competitor’s. A group of 100 children was asked to evaluate each brand, and then to express a preference. To guard against bias, neither the children, nor the ...
19. ### statistics

If we wish to have a 90% confidence interval, what would be the value of ?/2? Show how you arrived at this answer.
20. ### statistics

According to Chebyshev’s theorem, what proportion of a distribution will be with k=4 standard deviations of the mean? Show all work as to how to find this
21. ### Law

Write a paragraph on the sources of law in which you have to address the following aspects: The kinds of sources of law; examples of sources that belong to each kind; the differences between the kinds of sources of law; the source of law which you have to use; to which kind of...
22. ### Math

Differentiate y=3secxtanx
23. ### physics

a force of 0.8N stretches an elastic spring by 2cm. find the force constant. f e = k=? f=ke 0.8=0.02 * k k=0.8/0.02 k=40N/m

September
25. ### Statistics

Find the area under the standard normal curve between z = 0 and z = 1.37.
26. ### Statistics

Find the area under the standard normal curve between z = 0 and z = 1.37.
27. ### Statistics

Find the area under the standard normal curve between z = 0 and z = 1.37.
28. ### Statistics

According to Chebyshev’s theorem, what proportion of a distribution will be with k=4 standard deviations of the mean? Show all work as to how to find this. I have no idea on how to do this. HELP!!!!
29. ### statistics

You are responsible for planning the parking needed for a new 256-unit apartment complex, and you are told to base the needs on the statistic “average number of vehicles per household is 1.9.” Which average (mean, median, mode) would be best if: • You wanted to ...
30. ### statistics

Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. * The nurses on the 5th floor record the medicines administered every day and report results to the doctors. don't understand at all
31. ### Algebra

The quotient of A number and 2, decreased by 5, is equal to 35. Find the number
32. ### Geometry

The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
33. ### Math

The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
34. ### algebra

The segment joining p1(-4,-7)and p2(6,9)is divided in to four equal parts find the points of division
35. ### maths

Gary can get two loan, \$12,000 at 8% simple interest for 9 months or a \$12000 9- month discounted loan at 7% discount. based on the actual interest paid and the true rate on the discounted loan, which of the two loan offers will Gary choose

3 was wrong
37. ### Statistics

Construct a 99% confidence interval for life expectancy of a new GE light bulb. 64 bulbs are randomly selected and a mean of 750 hours and a standard deviation of 20 hours is found. Assume the distribution of life expectancy is normally distributed.
38. ### Algebra 2

the sum of two numbers is 74. one number is 11 more than half the other. find both numbers
39. ### physics

a car with a mass of 1.50 x 10^3 kg starts from rest and acceleration to a speed of 18.0 m/s in 12.0 s. Assume that the force of resistance remains constant at 400.0 N during this time. What is the average power developed by the cars engine
40. ### Math

The Blue Jays won 17 more games than they lost. They played 52 games in all and had 3 ties. How many games did they lose?
41. ### Algebra

What is the slope Gas cost 3.29 per gallon. A function can be used to describe the cost to fill up a car.
42. ### Geometry

they are alternate interior
43. ### Geometry

Write a two column proof for: Given t is parallel s; angle 5 is congruent to angle 6. Prove: l is parallel m. Statements Reasons 1. t is parallel 1. Given to s 2.
44. ### Math

order these numbers from least to greatest. 3/20, 45%, 1/5, 7.5%, 27.5%
45. ### MATH

Allyne said that she had 8/5 of pizza left from the party. Billy said that she had 1.3 pizzas left. Explain if Billys answer is correct or not.
46. ### Maths

You wonder what altitude the plane reached when it was directly above the end of the runway and how far it travelled to get to that point. You know the runway tarmac is 5500 metres long and approximate that when the plane left the ground, it took off at an angle of 40 degrees...
47. ### Math

You are skier A, the first skier in a skiing event with three other skiers. Compared to your time, skier B is slower, by a time of +00:28. Skier C has a time of +2:13, and skier D has a time of -01:24. 1. Who is the fastest skier? 2. Since all times are compared to yours, what...
48. ### Math/algebra

The scale on a map is 2 cm : 7km. If two cities are 12 cm apart on the map what is the actual distance in km between the two cities? " this is NOT a homework question" i don't understand any of this!
49. ### Math

Mask put 130trading cards in protector sheet he fills 7 sheet and put the remaining 4 cards and 8 sheets each of the sheets has the same number of cards how many cards are in each filled sheet
50. ### life sciences

Describe how the products of the light phase of photosynthesis are used to form a glucose molecule and how this molecule is then broken down in the cell of a plant to release energy
51. ### Algebra

General tickets sell for \$6 and adult \$9. Sell at least 300 student and at least 500 adult. Costs \$1 to advertise for adult and \$.50 to advertise student. Have at most \$400 for advertising. What is most profit that can be made? algebra inequalities
52. ### science

What is the pathaway and processes of ingestion involved when a person has eaten a buttered polony sandwish?

Housing
54. ### Life orientation

Identity 4 hu rights violation and give two examples of such violation
55. ### Chemistry

How many grams of NO2 are needed to form 100.0g of HNO3?
56. ### Chemistry

How many moles of O2 must react with 0.550 mole ofMethanol?
57. ### Chemistry

How many grams of carbon dioxide ctsare produced when 78.0 grams of Methanol rea

Hot BB water
59. ### math

which is the least? 3/7, 2/5, 1/2, 1/3 I have no idea!
60. ### Biology

bond that holds atoms together in a molecule are... A.radiation energy B. kinetic energy C. thermal energy D. potential energy
61. ### Biology

which nucleic acid statement is true? A. mRNA codes for DNA B. mRNA codes for protein C. tRNA makes amino acids D. tRNA makes lipids I think B
62. ### biology

Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A!
63. ### Biology

key factor driving cellular differentiation in the body? A. rate of transcription B. cell nutrience C. expression of genetic coding D. chemical gradients in a cell environment I think A
64. ### chemistry

chlorine atoms have larger radii than fluorine A. True B. false I am unsure Answer Th
65. ### Biology

DNA can copy itself easier than RNA because? A. its a double helix B. polymer of nucleotide C. its confined to nucleus D.its supported by histone proteins I have no idea
66. ### Science

RNA is thought to have proceeded proteins and DNA, why? A. more types of RNA than DNA B. single stranded RNA is less complex than DNA Not sure if either are correct?

Thanks!
68. ### Science

Sustained increase in the population that makes up all the trophic levels requires an increase in A. primary producers B. primary herbivores C. primary carnivores D. keystone predators

Thanks!
70. ### English

Wow, she did great today. Wow is what part of speech in the sentence? I think a preposition but not sure?
71. ### chemistry

What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A
72. ### Science

DNA can copy itself easier than RNA because? A. its a double helix B. polymer of nucleotide C. its confined to nucleus D.its supported by histone proteins I have no idea
73. ### Science

chlorine atoms have larger radii than fluorine A. True B. false I am unsure
74. ### Science

Genetic Information is found where? A. nuclei B. ribosome I think A
75. ### Science

key factor driving cellular differentiation in the body? A. rate of transcription B. cell nutrience C. expression of genetic coding D. chemical gradients in a cell environment I think A
76. ### Science

Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A!
77. ### chemistry

S and O share chemical properties, but H2S is gas at room temp. and H2O is a liquid, why? A. H2O has stronger intermolecular bond B. H2S has a stronger intermolecular bond C. H2S has a stronger ionic bond D. H2O has a stronger ionic bond
78. ### Science

What cell stimulates immune cells to attack? A. Helper T cells B. Cytotoxic T cells
79. ### Science

Bond that holds atoms together in a molecule are? A. radiation energy B. kinetic energy C. thermal energy D. potential energy I think B
80. ### Science

What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A
81. ### Science

Lifelong protection after exposure such as the chicken pox is which type of immunity A. Active immunity B. innate immunity I think B
82. ### Science

function of smooth ER A. synthesis lipids B. form ribosomes C generate energy D phagocytose bacteria I think A
83. ### Science

Which example is an example of natural selection A.prairie dogs build an underground tunnel B. fish omit odor to avoid sea lions C. cats with better nutrition play more D. lizards absorb vitamin D to help digest food. I think B
84. ### Biology

Which nucleic acid statement is true A. mRNA codes for DNA B. mRNA codes for proteins C. tRNA makes amino acids D. tRNA makes lipids I think B
85. ### chemistry

The hands on a battery clock are which type of energy? A. chemical to kinetic B. potential to chemical C. kinetic to potential D. thermal to kinetic I think C
86. ### english

Jimmy you must leave the room shut the door and be quiet. Which of the following options correctly punctuates the sentence above? A Jimmy, you must leave the room, shut the door, and be quiet. B. Jimmy; you must leave the room, shut the door and be quiet. C. Jimmy you must ...

A?
88. ### english

Jimmy you must leave the room shut the door and be quiet. Which of the following options correctly punctuates the sentence above? A Jimmy, you must leave the room, shut the door, and be quiet. B. Jimmy; you must leave the room, shut the door and be quiet. C. Jimmy you must ...
89. ### english

Which of the following sentences is written correctly? A When properly designed, an automobile can achieve great fuel efficiency. B. When properly designed an automobile can achieve great fuel efficiency. C. When properly designed, great fuel efficiency can be achieved by an ...
90. ### english

Which of the following sentences is punctuated correctly? A. After you sign the agreement it is too late of course, to change your mind. B. After you sign the agreement, it is too late of course to change your mind. C. After you sign the agreement, it is too late, of course, ...
91. ### Physics

A pulley system has a velocity ratio of 4 and an efficiency of 80%.calculate the value of the effort required to raise the load of 480N
92. ### Science (Physics)

S=ut + 1\2at*2 S=0×5 + 1\2×30×5×5 Divide through 2 by 30 S=0 + 6×5×5 Multiply together S= 0 + 150 S=150m
93. ### Science (Physics)

S=ut + 1\2at*2 S=0×5 + 1\2 30×5×5 Divide through 2 by 30 S=0 + 6×5×5 Multiply together S= 0 + 150 S=150m
94. ### Math

finding the missing measurement: A rectangular prism has a volume of 195 cubic units. The length of the prism is 13 units and the width of the prism is 3 units, what is the height

96. ### Chemistry

Second one same way as first you will get C-1 H-2 Empirical formula is CH2 Empirical formula mass is 14u Molar mass is 42.08u Divide molar mass by empirical formula mass and you'll get n value. N=3 Multiply N to empirical formula to get molecular formula which is C3H6 (...
97. ### Chemistry

First one , 1- percentage of cerium (Z=58) 1.67/6.21 * 100% = 26.89% 2- percentage of iodine is 100- 26.89= 73.10% Divide each of the percentage by its mass then we get Cerium- 26.89/140=0.192 Iodine - 73.10/126.9=0.576 Out of those two numbers divide both by the lowest no. ...
98. ### science

so the answer would be A
99. ### science

Predict how the range of the projectile will change when you change the angle from 45∘, keeping the speed constant. Predict how the range of the projectile will change when you change the angle from , keeping the speed constant. A. It increases with either an increase or...
100. ### science

First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is given by y(t)=y0+v0t−(1/2)gt2, where y0=0 is the initial position (which is 1.2 m above the ground due to the wheels of the cannon), v0 is the ...
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