Posts by sharon
Total # Posts: 868

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. 
statistics
I am unsure. This is how the question was worded. 
statistics
In the formula ? (x – µ)^2/n for the variance, in what cases would we divide by n1 instead of n? 
Math
What are the general formula for the sequence 1,4,9,16 
Physics
Types of thermometer 
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 
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 ... 
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. 
statistics
If the critical values of a hypothesis test are +2.58 and 2.58, what would be the critical regions? 
Microbiology
. If you counted 20 colonies from a 0.01ml inoculum of a 1:10 dilution of urine, how many organisms per milliliter of specimen would you report? Is this number significant? 
statistics
if you counted 20 colonies from 0.01ml inoculum of a 1:10 diulation of urine, how many organisms per milliliter of speciman would you report? Is this number significant 
statistics
The Maximum Error of Estimate is exactly equal to half of the width of the confidence interval. TF, and why or why not? 
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 zvalues. ? z = 0 to z = 2.10 ? X 
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 zvalues. z = 0 ... 
statistics
A box contains 10 items, of which 3 are defective and 7 are nondefective. 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 ... 
statistics
A box contains 10 items, of which 3 are defective and 7 are nondefective. 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 
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. 
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 ... 
statistics
If we wish to have a 90% confidence interval, what would be the value of ?/2? Show how you arrived at this answer. 
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 
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... 
Math
Differentiate y=3secxtanx 
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 
floral
September 
Statistics
Find the area under the standard normal curve between z = 0 and z = 1.37. 
Statistics
Find the area under the standard normal curve between z = 0 and z = 1.37. 
Statistics
Find the area under the standard normal curve between z = 0 and z = 1.37. 
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!!!! 
statistics
You are responsible for planning the parking needed for a new 256unit 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 ... 
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 
Algebra
The quotient of A number and 2, decreased by 5, is equal to 35. Find the number 
Geometry
The segment joining p1(4,7)and p2(6,9)is divided in to four equal parts find the points of division 
Math
The segment joining p1(4,7)and p2(6,9)is divided in to four equal parts find the points of division 
algebra
The segment joining p1(4,7)and p2(6,9)is divided in to four equal parts find the points of division 
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 
American Government
3 was wrong 
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. 
Algebra 2
the sum of two numbers is 74. one number is 11 more than half the other. find both numbers 
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 
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? 
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. 
Geometry
they are alternate interior 
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. 
Math
order these numbers from least to greatest. 3/20, 45%, 1/5, 7.5%, 27.5% 
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. 
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... 
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... 
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! 
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 
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 
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 
science
What is the pathaway and processes of ingestion involved when a person has eaten a buttered polony sandwish? 
life orientation
Housing 
Life orientation
Identity 4 hu rights violation and give two examples of such violation 
Chemistry
How many grams of NO2 are needed to form 100.0g of HNO3? 
Chemistry
How many moles of O2 must react with 0.550 mole ofMethanol? 
Chemistry
How many grams of carbon dioxide ctsare produced when 78.0 grams of Methanol rea 
Rebus
Hot BB water 
math
which is the least? 3/7, 2/5, 1/2, 1/3 I have no idea! 
Biology
bond that holds atoms together in a molecule are... A.radiation energy B. kinetic energy C. thermal energy D. potential energy 
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 
biology
Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A! 
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 
chemistry
chlorine atoms have larger radii than fluorine A. True B. false I am unsure Answer Th 
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 
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? 
Science
Thanks! 
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 
English
Thanks! 
English
Wow, she did great today. Wow is what part of speech in the sentence? I think a preposition but not sure? 
chemistry
What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A 
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 
Science
chlorine atoms have larger radii than fluorine A. True B. false I am unsure 
Science
Genetic Information is found where? A. nuclei B. ribosome I think A 
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 
Science
Pepsin is... A. enzyme B. lipid C. carbohydrate D. nucleic acid I think A! 
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 
Science
What cell stimulates immune cells to attack? A. Helper T cells B. Cytotoxic T cells 
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 
Science
What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A 
Science
Lifelong protection after exposure such as the chicken pox is which type of immunity A. Active immunity B. innate immunity I think B 
Science
function of smooth ER A. synthesis lipids B. form ribosomes C generate energy D phagocytose bacteria I think A 
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 
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 
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 
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 ... 
english
A? 
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 ... 
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 ... 
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, ... 
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 
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 
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 
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 
mathematical Literacy, Economics and Business Stud
What career(s) can I pursue with these subjects? Please help. I am very lost. 
Chemistry
Second one same way as first you will get C1 H2 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 (... 
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. ... 
science
so the answer would be A 
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... 
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 ...