# emma

Popular questions and responses by emma-
## math

you invest $4000 in an account that pays simple interest of 6% for 30 years. calculate the amount of money you'll have at the end of the indicated time period.

*asked on May 16, 2013* -
## MATH

One light flashes every 2 minutes and another light flashes every 3.5 minutes. Suppose both lights flash together at noon. What is the first time after 1 PM that both lights will flash together ?

*asked on June 26, 2012* -
## Economics

What is true of education spending? A. It is a significant expense of state governments. B. It costs the federal government more than Social Security benefits. C. It has increased at a greater rate than health care spending. D. It is the largest part of

*asked on October 10, 2019* -
## Economics

Read the statement. Economists note that personal income rose by 5 percent last year. What impact will the change in personal income have on-demand? A. It will cause the demand curve to shift down. B. It will cause the demand curve to shift right. C. It

*asked on October 30, 2019* -
## Chemistry

What would the net ionic equation be for : HBr (aq) + KOH (aq) = KBr + H2O

*asked on October 15, 2017* -
## maths

each of the students in a class writes a dirrerent 2 digit number on the whiteboard. the teacher claims that no matter what the students write, there will be at least three numbers on the whiteboard whose digits have the same sum. what is the smallest

*asked on July 7, 2007* -
## calculus

If 800 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? Answer to the nearest square foot without commas. For example, if the answer is 1,000, write 1000.

*asked on April 22, 2015* -
## Chemistry

The complex ion, [Ni(NH3)6]2+, has a maximum absorption near 580 nm. Calculate the crystal field splitting energy (in kJ/mol) for this ion.

*asked on December 6, 2012* -
## Chemistry

What element is undergoing oxidation (if any) in the following reaction? CH4(g) + 2 O2(g) ¨ CO2(g) + 2 H2O(g)

*asked on December 6, 2012* -
## Economics

What prevents a monopolistic competition from being perfectly competitive? A. Consumers are not knowledgeable. B. The market is dominated by one firm. C. Products are not identical. D. The barriers to entry are significant. Is it A?

*asked on October 7, 2019* -
## Algebra

1. Three times the width of a certain rectangle exceeds twice its length by two inches. Four times its length is twelve more than its perimeter. Write a system of equations that could be used to solve this problem. (hint: P = 2L + 2W) 2. Your mother has

*asked on July 15, 2020* -
## Chemistry

combustion analysis of 63.8 mg of C,H, and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O. What is the empirical formula for the compound?

*asked on December 6, 2012* -
## Economics

Which best describes Robert Owen’s political ideology and its impact on business? He was a Communist who believed business could only flourish if the government owned it. He believed in a laissez-faire political system and the absence of government in

*asked on September 26, 2019* -
## Chemistry

Which of the following is NOT true for ΔGrxn? A.) If ΔG°rxn > 0, the reaction is spontaneous in the forward direction. B.) If Q = 1, then ΔGrxn = ΔG°rxn.If ΔG°rxn = 0, the reaction is spontaneous in the reverse direction. C.) If ΔG°rxn > 0, the

*asked on November 16, 2014* -
## Trigonometry

Given that sin^2x = 4/13, what is the cos^2x? I am so lost. I need to show my work. Please help. THANK YOU!

*asked on August 30, 2017* -
## Psychology

5.Regarding the trichromatic theory of color vision, which statement is most accurate? A. The theory maintains that receptor cells are grouped in pairs, such as black-white. B. Specialized cells in the retina engage in a process called feature detection.

*asked on May 4, 2016* -
## Urgent math

The initial size of a culture of bacteria is 1000. After one hour the bacteria count is 4000. (a) Find a function n(t) = n0ert that models the population after t hours. n(t) = b)Find the population after 1.5 hours. (Round your answer to the nearest whole

*asked on August 3, 2015* -
## Calculus

A cylindrical tank is to have a capacity of 1000 m³. It is to fit into a foundry that is 12 m wide with a height of 11 m. The base of the tank will cost half as much as the top. The metal for the side of the tank will cost four fifths as much as the top.

*asked on June 10, 2019* -
## Chemistry

A chemistry student needs to standardize a fresh solution of sodium hydroxide. She carefully weighs out 338.mg of oxalic acid H2C2O4 , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in 250.mL of distilled water. The

*asked on November 7, 2018* -
## AP calc

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = 8x − x^2, y = 12; about x = 2

*asked on February 19, 2015* -
## calculus

An oil pipeline will connect points A and B which are 3 km apart and on opposite banks of a 1 km wide river. From point A to point C on the opposite bank, the pipeline will run under the water. From point C to point B the pipeline will run above ground.

*asked on June 10, 2019* -
## math

the perimeter of a rectangle with adjacent side lengths of x and y, where x>y, is 8 times as great as the shorter side to the rectangle. what is the ratio of y to x? a. 1:2 b. 1:3 c. 1:4 d. 2:3 is b the answer?

*asked on August 8, 2018* -
## History

Which explains why the Compromise of 1850 intensified the argument about slavery? A- People for and against slavery migrated to Western stats to influence laws. B~Free states in the West added more antislavery votes to Congress. C~The equal division of

*asked on April 27, 2015* -
## Chemistry

The temperature rises from 25.00 °C to 29.00 °C in a bomb calorimeter when 3.50 g of sucrose undergoes combustion in a bomb calorimeter. Calculate ÄErxn for the combustion of sucrose in kJ/mol sucrose. The heat capacity of the calorimeter is 4.90 kJ/°C

*asked on December 6, 2012* -
## history

How did feudal monarchs in the High Middle Ages centralize power? need explanation

*asked on October 11, 2016* -
## Chemistry

What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.40 L of an NaOH solution with a pH of 10.5?

*asked on March 17, 2013* -
## chemistry

Choose the bidentate ligand from the substances below. A) cyanide ion B) ammonia C) EDTA D) carbon monoxide E) ethylenediamine

*asked on December 6, 2012* -
## Chemistry

Determine the volume of H2S (at 375 K and 1.20 atm) needed to produce 55.0 g of S. Assume that there is excess SO2 present. 2 H2S(g) + SO2(g) ¨ 3 S(s) + 2 H2O(g)

*asked on December 6, 2012* -
## Math-Probability

A law firm has six senior and fourteen junior partners. A committee of 3 partners is selected at random to represent the firm at a conference. What is the probability that at least one of the junior partners is on the committee?

*asked on March 16, 2012* -
## Algebra 2(help please!!)

1. Tony decides to use observation. He visits 10 students and observes them doing schoolwork at home for 30 min. If a student looks at social media during that time, he notes it. (a) Provide an advantage of using observation. (b) Provide a disadvantage of

*asked on December 7, 2016* -
## calculus

The area A = πr2 of a circular water ripple changes with the radius. At what rate does the area change with respect to the radius when r = 4ft?

*asked on April 13, 2015* -
## Economics

Please help me. What are the primary reasons people choose to invest and trade stocks? (Select all that apply.) to earn capital gains*** to earn predictable quarterly interest to earn a dividend*** to earn liquid money

*asked on October 31, 2019* -
## Psychology

9.By means of introspection, Dr. Marsh attempts to determine the components of things like perception, thinking, and consciousness. By contrast, Dr. Smyth wants to understand what the mind does in producing different kinds of behavior. We can reasonably

*asked on May 4, 2016* -
## calculus

In the space below, provide the smaller of the two positive integers that add to 40 and have the largest possible product

*asked on April 22, 2015* -
## PHYSICS

a locomotive pulls 10 identical freight cars. the force between the locomotive and the first car is 100,000 Newtons, and the acceleration of the train is 2m/s^2. there is no friction to consider.what is the force between the ninth and tenth cars?

*asked on July 7, 2014* -
## Economics

What is true regarding taxes in a market economy? They tend to be high because the government is more efficient. They tend to be high so that the government can develop a budget surplus. They tend to be low in order to encourage work. They tend to be low

*asked on September 26, 2019* -
## physics

a delivery person pulls a 20.8 kg box across the floor. the force exerted on the box is 95.6n (35 above the horizontal). the force of kinetic friction on the box has a magnitude of 75.5n. the box starts from rest. using the work-energy theorem determine

*asked on March 18, 2019* -
## Math

If two cylinders are similar, find the scale factor of the smaller figure to the larger figure. The surface area of the smaller area is 20 pi yards squared. The surface area of the larger cylinder is 125 pi yards squared. No radius or height is given, and

*asked on March 26, 2017* -
## indiana Connections acadamy

i know that this isnt really a homework question but i do know alot of people from connexus are on here. If i want to unenroll from Indiana conenctions acadamy, can i unenroll in the next 9 weeks or do i have to wait until next semester. My parents wont

*asked on October 5, 2016* -
## History

1. How did new England's textile industry affect both children and women? a) It allowed them to earn a living wage until the age of 25. b) It gave them opportunities not available on family farms. c) It permitted them to complete their schooling. d) It

*asked on March 24, 2015* -
## physics help plz

One 3.5 kg paint bucket is hanging by a massless cord from another 3.5kg paint bucket, also hanging by a massless cord, as shown in the figure . Part a) If the buckets are at rest, what is the tension in lower and higher cord ? Part b)If the two buckets

*asked on May 6, 2012* -
## Economics

In what key area do the benefit principle of taxation and the ability-to-pay principle of taxation differ? A. how taxes should be collected B. which types of items should be taxed C. who should pay the taxes D. what percentage of income should be taxed Is

*asked on October 10, 2019* -
## Psychology

13.Within the cerebral cortex, the _______ area is found in the occipital lobe. A. visual B. association C. somatosensory D. main auditory 14.Dr. Lombard's research is focused on the capacity of the human mind to store and retrieve information. Her

*asked on May 4, 2016* -
## PHYSICS

a flywheel makes300.rpm. find the angular speed of any point on the wheel and the linear speed(tangential) of a point 5.00m from the center.

*asked on July 30, 2014* -
## physics

question : net force of 225 N accelerates a bike and rider at 2.65m/s^2. What is the mass of the bike and rider together ?

*asked on April 29, 2012* -
## Algebra

10. A moving van company charges a fee of 35.00 dollars for the truck rental and 25 cents for every mile the truck travels from the loading location. Let y be the cost in dollars for using the truck for x miles. Write the slope-intercept form of the

*asked on July 10, 2020* -
## PHYSICS

a 100kg street light is supported equally by two ropes. one rope pulls up and to the right 40 degrees above the horizontal; the other pulls up and to the left 40 degrees . what is the tension of the rope?

*asked on July 11, 2014* -
## Chemistry

Calculate the molar enthalpy for the following reaction. HCl(aq) + NH3 (aq) --> NH4Cl (aq). HCl = 50 ml (2.00M) NH3 = 50 ml (2.05 M) Delta T = 9.28 degrees Celsius. Ccal = 28.9J/g degrees celcius.

*asked on November 12, 2012* -
## ENGLISH

3. What is the rhyme scheme of the following Anne Bradstreet poem? To Her Father with Some Verses Most truly honored, and as truly dear, If worth in me or ought I do appear, Who can of right better demand the same Than may your worthy self from whom it

*asked on September 4, 2012* -
## Math

Hi! I just want someone to check my answers please! I cannot provide you with any pictures as I have gotten them off of my schools website. You cannot access these pictures because you have to be logged in. 1. Andrea drew triangle JKL as shown. A. The sum

*asked on February 16, 2017* -
## PHYSICS

two masses m1=400.g and m2 =600.g are connected with a light string which goes over a frictionless pulley of negligible mass. the two systems are released from rest. a) what is the acceleration of each mass? b) what is the tension force in the string? and

*asked on July 21, 2014* -
## Algebra

A population of ants is growing at a rate of 10% per month. What is the growth factor?

*asked on June 28, 2014* -
## physics- please help !

A box weighing 65.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end. Part a) Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley

*asked on May 6, 2012* -
## Math

find the greatest four-digit number that has exactly three positive factors.

*asked on October 14, 2010* -
## math

12. An electrician charges a 45.00 dollars travel fee plus 30.00 dollars per hour of labor. Let y be the cost in dollars for x hours of work. Write the slope-intercept form of the equation. 13. Using the equation from number 12, if the electrician works 3

*asked on July 10, 2020* -
## Chemistry

HA +H2O ---> A- +H3O+ In the equation is HA a strong acid?

*asked on April 24, 2020* -
## Math

1. Simplify. 3x^2+ 5x-5x^2-4x+5-2 A.-8x^2-9x+3 B.2x^2+x+3 C.-2x^2-9x+3*** D.-2x^2+x+3 2. Add or Subtract.(8x – 2y) + (3x – 4y) A.11x+8y B.4x-y C.11x-6y*** D.5x+2y 3.(5x^2-4x-1)-(-4x^2-4) A.-9x^2-8x-1 B.9x^2-4x+3*** C.x^2-4x-3 D.9x^2+4x-3 4.The distance

*asked on May 5, 2016* -
## Psychology

Dr. Jones is interested in how human behavior may be genetically inherited from remote ancestors, such as chimpanzees. Her field of interest is A. chemical psychobiology. B. evolutionary psychology. C. clinical neuropsychology. D. behavioral genetics. I

*asked on May 4, 2016* -
## math

A house plan is drawn to scale of 1cm to 2m what is the length of a window 2.5cm long on the plan

*asked on November 11, 2015* -
## History

1.Which answer best describes a reason why industries flourished in New England? A- The people in New England had more work experience. B- New England had more lakes to use for water in factories. C- The soil was better than in the South so they could grow

*asked on April 28, 2015* -
## Geometry

Which if the following is equivalent to 7pi/4? A.285 degrees B. 305 degrees C. 315 degrees D. 330 degrees E. 375 degrees

*asked on May 4, 2014* -
## chemistry

Liquid hexane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 3.45 g of hexane is mixed with 16.3 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Be

*asked on December 6, 2011* -
## algebra

Match the inequality to its graph. A. less than or equal to -1 B. less than 3 C. less than 1 D. less than or equal to -3 7. 4y + 3 *less than or equal to* y+6 8. -2y > 2 9. y over 3 < -1 10. 3y *less than or equal to* 2y +

*asked on September 30, 2016* -
## chemistry

Which statement describes a chemical reaction at equilibrium? A. The forward reaction happens slightly faster than the reverse reaction. B. The reaction has stopped because all reactants have been used up. C. The forward reaction happens at the same rate

*asked on September 10, 2016* -
## Algebra

Combine like terms and classify the polynomial by the number of terms. 7x + 3x – x Is monomial correct?

*asked on July 7, 2014* -
## Algebra

Which is an equivalent form of the expression 1800(1.2)–t? Is 1800(1/2)^t correct?

*asked on June 28, 2014* -
## Chemistry

How much water would I need to add in order to dilute 200mL of a 5 M solution down to 2 M?

*asked on February 21, 2014* -
## math

Assume you want to accumulate $125,000 for a long-range goal in 40 years. You have two choices. Plan A is an account with annual compounding and an APR of 5%. Plan B is an account with continuous compounding and an APR of 4.5%. How much of an investment

*asked on May 14, 2013* -
## Chemistry

Thyroxine, an important hormone that controls the rate of metabolism in the body can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution could be measured as 5.144°C. Pure

*asked on January 21, 2013* -
## AP Language & composition

What two pieces of information are necessary each time you cite a source in the text of your paper?

*asked on September 3, 2012* -
## history

what was the napoleonic code?

*asked on October 18, 2010* -
## Math

Lily is very happy with the fuel efficiency of her new car. She estimates that she can drive 14 km per litre of gas. What is the word equation?

*asked on March 24, 2020* -
## Algebra

A person invested $7000 for 1 year, part at 5%, part at 10%, and the remainder at 15%. The total annual income from these investments was $815. The amount of money invested at 15% was $200 more than the amount invested at 5% and 10% combined. Find the

*asked on November 24, 2015* -
## Honors English 11

Can someone check my answer please? Q: Read and analyze "When I heard the learn'd Astronomer" by Walt Whitman. What romantic ideas does it express, and how does the structure of the poem reinforce the meaning? -When i heard the learn'd astronomer; When the

*asked on October 29, 2015* -
## History

How were William Lloyd Garrison and the Rev. Elijah Lovejoy alike? Both lived in Boston and were Underground Railroad conductors. Both printed newspapers with antislavery messages in the North. Both used their houses as Underground Railroad stations and

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

The height of a cylinder with a fixed radius of 4 cm is increasing at the rate of 2 cm/min. Find the rate of change of the volume of the cylinder (with respect to time) when the height is 14cm.

*asked on April 13, 2015* -
## language / reading

I can't figure out what the climax of The Last Battle is? Is it this,the climax of The Last Battle is when Jill and Eustace go to the real Narnia.

*asked on October 27, 2014* -
## Algebra

Which special case is represented by x^2-121? A. the difference of two squares B. the difference of cubes C. the square of a binomial D. the sum of cubes

*asked on July 9, 2014* -
## BIOLOGY

undigested food enters the intestine called the ? chyme is this answers right ? PLEASE HELP ME

*asked on April 21, 2014* -
## physics

A car sits in an entrance ramp to a freeway, waiting for a break in the traffic. The driver sees a small gap between a van and an 18-wheel truck and accelerates with constant acceleration along the ramp and onto the freeway. The car starts from rest, moves

*asked on September 29, 2013* -
## word problem

a woman age and her son added to 45, 5 years ago the woman was 6 times as old as her son. how old was the woman when the son was born.

*asked on November 21, 2011* -
## Math

How many ways can a person select 3 movies to rent from the top ten rentals? Arrange them into a triple feature?

*asked on May 31, 2011* -
## Chemistry

How do I calculate the amount of heat needed to convert 96g of ice at -24 degrees celciua to water at 28 degrees celciua?

*asked on April 26, 2011* -
## PreCalculus

Cone Problem Beginning with a circular piece of paper with a 4- inch radius, as shown in (a), cut out a sector with an arc of length x. Join the two radial edges of the remaining portion of the paper to form a cone with radius r and height h, as shown in

*asked on January 1, 2011* -
## unscrambling word

Can you help me unscramble these words please! radmordey conshorier trinabac mecal minglem bobing lukarak its in spanish- srecmoro, and tsmnoamo- help please england antelope is the answer tyler! lafrpty=flytrap lafrpty=flytrap please help me to unscramble

*asked on June 14, 2005* -
## Economics

Help me with this, please. Read the statement. Economists note that personal income rose by 5 percent last year. What impact will the change in personal income have on-demand? It will cause the demand curve to shift down. It will cause the demand curve to

*asked on October 31, 2019* -
## Economics

Read the statement. A monopoly’s prices are determined by _[blank]_. Which most accurately completes the sentence? A. competing firms B. perfect competition C. the monopoly D. market equilibrium Is it A?

*asked on October 7, 2019* -
## Algebra

A regular pentagon and an equilateral triangle have the same perimeter. The perimeter of the pentagon is 5 (1/2x +2) inches. The perimeter of the triangle is 4(x-2) inches. What is the perimeter of each figure?

*asked on July 16, 2019* -
## Algebra

Simplify the rational expression. State any restrictions on the variable. t^2+4t-12/t^2-4

*asked on March 7, 2019* -
## Pre-Algebra A

A company reports $23,765 in income and $18,945 in expenses for February. What was the amount of profit or loss for the month? A. $4,820 profit B. $4,820 loss C. $5,220 profit

*asked on February 13, 2019* -
## science

How do the Sun, Earth, and Moon depend on each other?

*asked on February 11, 2018* -
## Biology

What would happen if the gametes forming a zygote is diploid?

*asked on July 18, 2017* -
## Algebra 2(help please!!)

Alisha bought a collection of 500 old pennies. She chose 20 pennies from the collection and recorded their dates. Seven pennies had dates earlier than 1980. What percent of the pennies in Alisha’s collection have dates earlier than 1980? How would I

*asked on December 7, 2016* -
## Psychology

3.If you adopt the _______ perspective, you'll reject an emphasis on what goes on in people's minds in favor of focusing on measurable behaviors that can be objectively measured. A. psychodynamic B. neuroscience C. cognitive D. behavioral 4.Agatha

*asked on May 4, 2016* -
## Math

the terminal side of an angle in standard position coincides with the line x-2y=0, what is the cosine to the nearest ten-thousandth??? I am completely lost with this one

*asked on January 6, 2016* -
## Algebra

x: 0, 2, 4, 6 ,8 y: 1, 49, 2401, 117,649 How do the y-values in the table grow? A. The y-values increase by a factor of 49 for each x increase of 1. B. The y-values increase by 49 for each x increase of 1. C. The y-values increase by a factor of 7 for each

*asked on July 6, 2014* -
## PHYSICS

a car is proceeding at a speed of 14.0m/s when it collides with a stationary car in front. during the collision the first car moves a distance of 0.300 m as it comes to a stop. the driver is wearing her seat belt, so she remains in her seat during the

*asked on July 5, 2014* -
## Trigonometry

Prove that tanx+cotx=2sec(2x) Thank you! :)

*asked on January 7, 2013* -
## algebra

for -(-3 + 4) distribute the negative outside the parentheses to both the -3 and the 4

*asked on May 15, 2020* -
## Chemistry

The reaction of hydrochloric acid (HCl) with ammonia (NH3) is described by the equation: HCl + NH3 → NH4Cl A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the ammonia? A. 6.4 mL

*asked on May 5, 2020*