# Sharon

Newest questions and responses by Sharon-
## 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.

*asked on May 2, 2018* -
## statistics

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

*asked on May 1, 2018* -
## Math

What are the general formula for the sequence 1,4,9,16

*asked on March 13, 2018* -
## Physics

Types of thermometer

*asked on February 27, 2018* -
## 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

*asked on February 20, 2018* -
## 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,

*asked on February 19, 2018* -
## 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.

*asked on January 19, 2018* -
## statistics

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

*asked on January 18, 2018* -
## 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?

*asked on January 16, 2018* -
## 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

*asked on January 16, 2018* -
## 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?

*asked on January 12, 2018* -
## 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

*asked on January 2, 2018* -
## 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

*asked on December 29, 2017* -
## 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

*asked on December 26, 2017* -
## 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

*asked on December 22, 2017* -
## 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.

*asked on December 15, 2017* -
## 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

*asked on December 15, 2017* -
## statistics

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

*asked on September 20, 2017* -
## 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

*asked on September 4, 2017* -
## 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

*asked on June 27, 2017* -
## Math

Differentiate y=3secxtanx

*asked on June 8, 2017* -
## 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

*asked on May 11, 2017* -
## Statistics

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

*asked on February 19, 2017* -
## Statistics

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

*asked on February 17, 2017* -
## 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!!!!

*asked on February 11, 2017* -
## 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: •

*asked on February 4, 2017* -
## 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

*asked on February 4, 2017* -
## Algebra

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

*asked on January 22, 2017* -
## Geometry

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

*asked on January 19, 2017* -
## Math

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

*asked on January 19, 2017* -
## algebra

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

*asked on January 19, 2017* -
## 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

*asked on January 11, 2017* -
## 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.

*asked on December 7, 2016* -
## Algebra 2

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

*asked on November 29, 2016* -
## 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

*asked on November 10, 2016* -
## 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?

*asked on November 2, 2016* -
## 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.

*asked on October 20, 2016* -
## 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.

*asked on October 17, 2016* -
## Math

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

*asked on October 16, 2016* -
## 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.

*asked on October 16, 2016* -
## 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

*asked on October 13, 2016* -
## 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

*asked on October 12, 2016* -
## 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!

*asked on September 26, 2016* -
## 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

*asked on September 11, 2016* -
## 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

*asked on July 17, 2016* -
## 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

*asked on May 29, 2016* -
## science

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

*asked on May 10, 2016* -
## Chemistry

How many grams of NO2 are needed to form 100.0g of HNO3?

*asked on April 15, 2016* -
## Chemistry

How many moles of O2 must react with 0.550 mole ofMethanol?

*asked on April 15, 2016* -
## Chemistry

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

*asked on April 15, 2016* -
## Rebus

Hot BB water

*asked on March 31, 2016* -
## math

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

*asked on February 18, 2016* -
## Biology

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

*asked on February 18, 2016* -
## 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

*asked on February 18, 2016* -
## biology

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

*asked on February 18, 2016* -
## 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

*asked on February 18, 2016* -
## chemistry

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

*asked on February 18, 2016* -
## 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

*asked on February 18, 2016* -
## 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?

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## English

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

*asked on February 17, 2016* -
## chemistry

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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## Science

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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## 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

*asked on February 17, 2016* -
## 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.

*asked on February 13, 2016* -
## 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.

*asked on February 13, 2016* -
## 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

*asked on February 13, 2016* -
## 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

*asked on February 13, 2016* -
## 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

*asked on February 12, 2016* -
## 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

*asked on February 8, 2016* -
## mathematical Literacy, Economics and Business Stud

What career(s) can I pursue with these subjects? Please help. I am very lost.

*asked on February 6, 2016* -
## 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

*asked on November 29, 2015* -
## 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

*asked on November 29, 2015* -
## Statistics

Create a null hypothesis or the following research questions: (a) What are the differences between emergency room shifts on medication errors? (b) On a clinical trail of a new drug, what will be the effects over a currently used drug?

*asked on November 13, 2015* -
## Statistics

The same supervisor in the scenario above agreed to increase the salary of the employee to $15.00 per hour once she passed her RHIT exam. Three months after beginning her employment , the employee passed her RHI exam. What will the new budget be for salary

*asked on October 23, 2015* -
## chemistry

The complete combustion of ethanol, C2H5OH (FW = 46.0 g/mol), proceeds as follows: C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l) ΔH = −555 kJ What is the enthalpy change for combustion of 15.0 g of ethanol

*asked on October 22, 2015* -
## programing in basic

the computer will accept what statement, if four statements are entered with the same number?

*asked on October 13, 2015* -
## Chemistry

glycine + valine-->glycine - valine+H2O What happens with this reaction and where does water molecule come from

*asked on October 12, 2015* -
## Grammar English

How would you change this sentence- The infant was handed to the pediatrician, who then cried spontaneously.

*asked on October 4, 2015* -
## ratios

emily recipe calls for 5 parts pineapple juice to 3 parts orange sherbert. james calls for 8parts pineapple to 6 parts orange sherbert.

*asked on October 1, 2015* -
## chem

If 20g of CaCo3is treated with 20gm of HCl how many grams of CO2 can be generated CaCO3+2HCl gives CaCl+H2O+CO2

*asked on September 29, 2015* -
## chem

CaCo3 reacts with aq HCl to give CaCl2+CO2. What mass of CaCo3 is required to react completely with 50cm^3 of 0.60M HCl. Calculate volume of CO2 produced at STP.

*asked on September 29, 2015* -
## chem

Calculate the mass of anhydrous sodium carbonate Na2Co3 required to prepare 2.5 litres of 0.50M aqueous solution.(Na=23,C=12,O=16)

*asked on September 29, 2015* -
## phyics

Four cars undergo acceleration as described by the data in the following table. Car Initial Velocity (m/s) Final Velocity (m/s) Time period (s) A 2.0 11.0 3.0 B -5.0 3.0 2.0 C 1.0 -5.0 2.0 D 0.0 25.0 10.0 Rank the accelerations from most positive to most

*asked on September 12, 2015* -
## Life orientation

Assess the extent to which bad road use has a direct impact on physical,emotional,social ,economic aspect to family,community,country

*asked on August 27, 2015* -
## pre-calculus

Steve, The following rational function describes concentration in blood of a certain medicine taken once depending on time, find: A. the horizontal asymptote B. the vertical asymptote C. describe their possible meaning ( I only need help with C).

*asked on June 20, 2015* -
## pre-calculus

The following rational function describes concentration in blood of a certain medicine taken once depending on time, find: A. the horizontal asymptote B. the vertical asymptote C. describe their possible meaning ( I only need help with C

*asked on June 20, 2015* -
## calculus

The following rational function describes concentration in blood of a certain medicine taken once depending on time, find: A.the horizontal asymptote(s) B.the vertical asymptote(s) C. describe their possible meanings Horizontal asymptote is y=-100 vertical

*asked on June 18, 2015* -
## math

Given the points A(0,0), B(4,3), and C(2,9), what is the measure of ABC?

*asked on May 14, 2015*