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Posts by sharon

Total # Posts: 837

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

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 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 ...

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

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 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 (...

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 ...

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?

probability
These events are actually not independent. Instead they're also not mutually exclusive, but as I've thought for a while it is more likely to be a combination of two possible outcomes with nothing in common. Because, there is a condition stated at the first place.

probability
P(biased coin) = 1/2 = P(A) P(dice) = 1/16 = P(B) P(A U B) = 1/2 + 1/16 = 9/16 (work it out using the venn diagram is also possible)

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 and fringe benefits?

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

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

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

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

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

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

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.

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)

Life orientation
Impact on bad road use based on the physical aspect

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 negative.

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

life orientation
Explain the impact of bad road use based on the physical, emotional, social, economic aspects.?

pre-calculus
Thank you

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). f(x)=x/x^2-100 Sharon

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). f(x)=x/x^2-100

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

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 asymptotes are x=-10...

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

math
An architect designs a house that is 12m wide. The rafters holding up the roof are equal length and meet at an angle of 68 degrees. The rafters extend 0.6m beyond the supporting wall. How long are the rafters?

math
a cone has a height of 10 cm and a volume of 350 cm. what is the radius of the cone?

math
what is the total amount of edging that would be required to cover all edges of a rectangular prism measuring 10 cm by 30 cm by 15 cm?

MAth
Calculate the perimeter of a right triangle where the legs are 6 cm and 8 cm

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