# Ariana

Popular questions and responses by Ariana-
## Maths!

Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: 8200 I do not know how to do this. Really do appreciate step by step workings and explanation. Thanks!

*asked on June 7, 2014* -
## Maths Vector Helpppp

The points A and B have position vectors, relative to the origin O, given by −−→OA = i+2j+3k and −−→OB = 2i+j+3k. The line l has vector equation r = (1−2t)i+ (5+t)j+ (2−t)k. (i) Show that l does not intersect the line passing through A and

*asked on January 19, 2015* -
## Physics

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad. What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an acceleration of 0.2g? A 1.2mg B mg C

*asked on July 1, 2014* -
## Chemistry

The relative molecular mass of a molecule of chlorine is 72. Which properties of the atoms in this molecule are the same? 1 radius 2 nucleon number 3 relative isotopic mass Answer: 1 only Can someone please explainnn! Thanks :)

*asked on August 26, 2014* -
## English

Choose a selection from the crossing borders unit. Write a short explanation of how one of the individuals in this selection is affected by a border crossing. Use specific examples or details to support your answer. I picked the story "Delfino II: Diez In

*asked on December 16, 2016* -
## Chem Help!

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

*asked on September 30, 2014* -
## Chemistry

Which process could be used to calculate the bond energy for the covalent bond X-Y by dividing its ∆H by n? A XYn(g) → X(g) + nY(g) B 2XYn (g) → 2XYn-1(g) + Y2(g) C Y(g) + XYn-1(g) → XYn(g) D nXY(g) → nX(g) + n/2 Y2(g)

*asked on September 21, 2014* -
## Chem help

Which reaction of ammonia does not involve the non-bonding pair of electrons on the nitrogen atom? A NH3(g) + CH3I(g) → CH3NH 3+ I –(s) B NH3(g) + HCl (g) → NH4Cl (s) C 2NH3(l) + 2Na(s) → 2NaNH2(s) + H2(g) D 2NH3(aq) + Ag+(aq) → [Ag(NH3)2]+(aq)

*asked on September 28, 2014* -
## Chen help!

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

*asked on September 19, 2014* -
## algebra 1

a roll of carpet 9 ft wide is 30 ft longer than a roll of carpet 15 ft wide. both rolls have the same area. make a sketch and find the dimensions of each.

*asked on October 28, 2010* -
## History

The Thirteenth, Fourteenth, and Fifteenth Amendments reflected the growing 19th century American trend of A) granting universal manhood suffrage. B) upholding rights of free speech and religion. C) decreasing the power of the Federal government.

*asked on October 5, 2016* -
## Chem Help!

Which pair of reagents will take part in a redox reaction? A CH3CH2OH + concentrated H2SO4 B CH3CHO + Tollens’ reagent C CH3CO2C2H5 + dilute H2SO4 D CH3COCH3 + Fehling’s solution Ans: B Someone please explain! Thanks! :)

*asked on September 30, 2014* -
## chemistry

What type of intermolecular forces would you expect to find between molecules of H2O? of BrCl? of hexane (C6H14)?

*asked on May 20, 2010* -
## math

Given that R = 3 x + 9 y Find x when y = 6 and R = 7 Give your answer as an improper fraction in its simplest form

*asked on May 13, 2017* -
## Math

what is the circumference of the circle round your answer to the nearest foot the circle is 28 ft. A.) 88 ft B.) 84 ft C.) 66 ft **** (ANSWER) D.) 44 ft

*asked on March 8, 2016* -
## algebra

the ratio of the weight of an object on jupiter to its weight on earth is 8 to 3. how much would a 100 pound person weigh on Jupiter? i`ll tell you the answer when am done solving so you can check if am right

*asked on November 22, 2014* -
## CHEM HELP!

A car burning lead-free fuel has a catalytic converter fitted to its exhaust. On analysis its exhaust gases are shown to contain small quantities of nitrogen oxides. Which modifications would result in lower exhaust concentrations of nitrogen oxides? 1 an

*asked on September 30, 2014* -
## Statistics

The registration numbers of vehicles in a certain country use digits 1-999. If a visitor has just entered the country. What is the probability that the first car he sees has at least 2 identical digits? Ans: 29/111

*asked on June 6, 2014* -
## finance

Terry makes $2400 per month in gross income. His net earnings are 80% of his gross. His utility bills total $150. What percentage of Terry's net earnings is he spending on utilities? Enter your answer as a percentage, such as: 1.5%.

*asked on June 2, 2020* -
## Science

Are euglena unicellular or multicellular? They are unicellular

*asked on February 21, 2017* -
## math

A farmer planted 3 2/3 acres of oats, 5 3/4 acres of wheat, and 2 5/6 acres of barley. Compute the total number of acres planted?

*asked on September 18, 2016* -
## Physics Capacitance

Three uncharged capacitors, X, Y, Z, each with capacitance of 12uF each are connected A---------[X]------[Y/Z]-----------B *Y&Z is parallel to each other* A potential difference of 9.0V is applied between points A and B. Explain why when the potential

*asked on April 25, 2015* -
## CHEM HELP PLEASE!

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and

*asked on September 20, 2014* -
## Chem

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

*asked on September 19, 2014* -
## Pure Maths

A container is in the shape of a right circular cone (inverted) with both height and diameter 2 meters. It is being filled with water at a rate of (pi)m^3 per minute. Fine the rate of change of height h of water when the container is 1/8th full(by volume).

*asked on August 16, 2014* -
## Math

The temperature at 6 a.m was 3° f. At noon it was it was 10° f. What was the change in the temperature ?

*asked on January 8, 2014* -
## math

DVD cases are 9/16" wide. If Juan has 60 DVDs, how many will fit on a 2 1/2 feet long shelf?

*asked on September 30, 2013* -
## Physics

A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 56° with the horizontal. The coefficient of static friction between the ladder and the ground is 0.36. If your mass is four times that of the ladder,

*asked on November 19, 2012* -
## Math

Alice has five shirts and three ties. How many possible outfits consisting of one shirt and one tie does he have?

*asked on September 16, 2009* -
## History

why did Mackenzie king and other world leaders like Chamberlain follow a policy of appeasement?

*asked on May 13, 2020* -
## algebra

solve the polynomial equation by finding all real roots thanks again x^3 + 6x^2 + 9x + 2 = 0

*asked on February 20, 2020* -
## Algebra

Solve the polynomial equation by factoring 18x^3 -15x^2 - 9x =0 I got as far as 3x(6x^2 - 5x - 3) = 0 Thanks

*asked on February 18, 2020* -
## math

19x^-2 why is this not a monomial?

*asked on January 7, 2020* -
## algebra

sketch the graph of f(x)= -x^2 (x+1) (x-2) thanks!

*asked on December 8, 2019* -
## chemistry

The half-life of radon-222 is about four days. After how many days is the amount of radon-222 equal to one-sixteenth of its original amount? I know the answer is 16,but why? Please steps...thank you!

*asked on October 22, 2019* -
## math

Find the x intercept and the y intercept: x – 5y = –5 I think the y intercept is 1 so do I just substitute?

*asked on October 6, 2017* -
## Maths(Surface integral/flux)

Let S be the funnel shaped surface defined by x^2 + y^2 = z^2 for 0

*asked on December 26, 2016* -
## Science PLEASE HELP

Explain how gravitational, electrical and magnetic force act on a maglev train?

*asked on December 6, 2016* -
## Math

The least common multiple of two numbers is 60 and one of the numbers is seven less than the other number what are the numbers? justify your answer

*asked on September 9, 2016* -
## Physics Helpppp

Q11 a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V. The frequency deviation of the carrier wave is 20 kHz V^–1 Describe, for the

*asked on May 2, 2015* -
## Chemistry

At 2000°C the equilibrium constant for the reaction is Kc = 2.4 ✕ 103. 2 NO(g) equilibrium reaction arrow N2(g) + O2(g) If the initial concentration of NO is 0.160 M, what are the equilibrium concentrations of NO, N2, and O2? I do not even know how to

*asked on November 28, 2014* -
## algebra

If it takes 4 ounces of insecticide to make 2/1/2 gallons of garden spray, how much spray can be made with 6 ounces of insecticide My answer was x=24 is it right???

*asked on November 23, 2014* -
## algebra

If there are 560 calories in 8 ounces of meat, how many calories are in 3 ounces of meat?

*asked on November 22, 2014* -
## Writing

In the other 6 groups there are 21 students in each of the 6 groups. *Does this sentence make sense.

*asked on October 26, 2014* -
## Math

10. Estimate 30% of the student population. You must show all of your work and provide an explanation. *There are 850 students.

*asked on October 26, 2014* -
## Chem AS

On addition of aqueous sodium hydroxide to an aqueous solution of salt R, a white precipitate is obtained, soluble in an excess of the hydroxide. A white ppt is also obtained when R is treated with aqueous ammonia , but it is insoluble in excess. Which of

*asked on October 6, 2014* -
## Chem

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

*asked on September 30, 2014* -
## CHEM HELP :(

The presence of 11-cis retinal, C20H28O, in cells in the eye is important for vision. The structure of retinal includes an aldehyde group, a cyclohexene ring and a long aliphatic side chain, in which a carbon-carbon double bond exists between carbons

*asked on September 20, 2014* -
## Chemistry Help!

Cyanohydrins can be made from carbonyl compounds by generating CN- ions from HCN in the presence of a weak base. In a similar reaction, -CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an Aldehyde and CH3CO2CH3?

*asked on September 19, 2014* -
## Maths

I have a diagram in which AB is a vertical cliff. BC is a vertical building 80m in height. P is a point on level ground 200m away from A. The angle of elevation of the bottom of the building from P is 44 degrees. What is the angle of elevation of the top

*asked on November 21, 2013* -
## social stody

what parts of canada are good for growing crops

*asked on October 23, 2012* -
## chemistry

If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?

*asked on October 23, 2012* -
## chem

Why do you think water is often called the universal solvent and what makes it such a good solvent?

*asked on May 29, 2010* -
## Business

A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer. Management charges higher nightly

*asked on May 17, 2010* -
## chemistry

Why is carbon dioxide gas that carbonates fountain drinks stored in sturdy canisters?

*asked on May 1, 2010* -
## Science! Plz help!

I can't figure this out. The questions are 1. A 25 letter word for a endoplasmic reticulum connected to the ribosomes. 2. 14 letter word for packaging of materials inside the cell. 3. 11 letter word for sinle- celled organism that can live on it's own 4. a

*asked on September 8, 2008* -
## Science

I can't figure this out. The questions are 1. A 25 letter word for a endoplasmic reticulum connected to the ribosomes. 2. 14 letter word for packaging of materials inside the cell. 3. 11 letter word for sinle- celled organism that can live on it's own 4. a

*asked on September 8, 2008* -
## Geography

I'm doing mapping and I need to put Bogota, Rio De Janeiro, and Buenos Aires on a map of the western hemisphere. I know if they're in north of south america, but I need exact location by Monday.

*asked on January 25, 2008* -
## economics

Which of the following are mentioned in the video as things to keep in mind, when picking the best life insurance option? Consider the non-numerical items, not just the numerical items Age matters Always pick the one with the lowest cost per year Dividends

*asked on June 1, 2020* -
## History

What is the significance of Hiroshima and Nagasaki (1945) ???

*asked on May 16, 2020* -
## History

what is Vj day : Victory Over Japan?

*asked on May 16, 2020* -
## math

a lock has a code of 5 numbers between 1 and 20 . If no numbers in the code are allowed to repeat, how many different codes could be made? so it is not 20C5 so can you tell me exactly what the answer is? I can try to figure out the other 9 questions from

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

a lock has a code of 5 numbers between 1 and 20 . If no numbers in the code are allowed to repeat, how many different codes could be made? so is the answer of 20C5 then 15,504?

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

A committee must be formed with 4 teachers and 4 students. If there are 6 teachers to choose from, and 12 students, how many different ways could the committee be made? so if the answer is (6,4) *(12,4) do i multiply these?

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

A committee must be formed with 4 teachers and 4 students. If there are 6 teachers to choose from, and 12 students, how many different ways could the committee be made? gracias

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

a lock has a code of 5 numbers between 1 and 20 . If no numbers in the code are allowed to repeat, how many different codes could be made? Thank you

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

How might the diversity of organisms in an area CHANGE after secondary succession has occurred. Give examples of producers and consumers that might be affected. Write in complete sentences.

*asked on May 13, 2020* -
## probaibility

There is a spinner with 9 equal areas, numbered 1 through 9. If the spinner is spun one time, what is the probability that the result is a multiple of 2 and a multiple of 3? thanks! is it 2/3?

*asked on May 11, 2020* -
## History

The Revolutionary War was fought on American soil. How do you think this fact influenced the role of women in the war?

*asked on April 29, 2020* -
## Writing

Does this intro sound good? Mental health is overlooked by millions every day. Mental health jobs are slowly declining and the ones who are available are always booked. Today we will be looking at the mental health pandemic that took the world by a storm.

*asked on March 17, 2020* -
## Algebra

Solve the polynomial by finding all roots x^3+3x^2+9x+27 =0 Thank you I got this so far X^2(x+3)+3(x+9)...????

*asked on February 21, 2020* -
## Algebra

Solve the polynomial by finding all roots 3x^3-8x^2+3x+2=0 I got so far 3x(x^2+1)-2(4x^2+1) Thank you!

*asked on February 21, 2020* -
## algebra

Solve the polynomial by finding all real roots G(x)= x^3 + 3x^2 +9x+ 27 I got x^2 (x+3) +3(x+9) so far Thank you

*asked on February 21, 2020* -
## Algebra

Solve polynomial equation by finding all real roots X^3+ 6x^2+9x+2=0 I get that the answer is x=-2 when you do synthetic division and that the equation is (x+2)(x^2+4x+1), BUT Where does the other answer . -2+/-√3 come from? Than you!

*asked on February 21, 2020* -
## algebra

oobleck thank you for trying to help me, but I don't get this (algebra) at all. It really is like Chinese to me. I have been studying using your help for hours and hours and I am so lost! When I ask the teacher she explains it the same way every time. I

*asked on February 20, 2020* -
## algebra

identify the number of zeros ....thank you 2x^4-250x=0

*asked on February 20, 2020* -
## algebra

Which of the following lists all of the roots of X^5 - 3x^4 + 3x^3 - x^2 =0 Why is the answer ( 0, 1) your answer was this: x^5 - 3x^4 + 3x^3 - x^2 = x^2(x^3-3x^2+3x-1) = x^2(x-1)^3 but i dont get the last part..(= x^2(x-1)^3)

*asked on February 20, 2020* -
## algebra

solve the polynomial by factoring (I know i can factor out 3x^3, but again idk what to do after that) thanks a bunch! -12x^5 -15x^4 + 21x^3=0

*asked on February 20, 2020* -
## algebra

solve by factoring (i know they are are divisible by 14, but I'm stuck) Thank you 210x^3 + 266x^2 + 14x - 42 = 0

*asked on February 20, 2020* -
## Algebra

SOLVE BY FACTORING...THANK YOU 2X^3 - 5X^2 - 3X=0

*asked on February 19, 2020* -
## Algebra

Which of the following lists all of the roots of X^5 - 3x^4 + 3x^3 - x^2 =0 Why is the answer ( 0, 1)

*asked on February 18, 2020* -
## Algebra

Solve the polynomial equation by factoring 2x^3 - 5x^2 - 3x = 0 Baby steps please...I believe answer is X= 0, 3, -1/2 But I don't know why Thank you!

*asked on February 18, 2020* -
## Algebra 2

find the greatest commom factor of the terms of the polynomial 48x^6 + 32X^2 - 26x^5 is the answer 2x^2? Thank you

*asked on January 28, 2020* -
## algebra

name the polynomial based on its degree and number of terms 5x^4 + 9x - 5 is it degree 4, terms 3, and quadratic trinomial? thank you

*asked on January 28, 2020* -
## social studies

How did the events in Mexico in 1910 and 1911 reveal the weakness of dollar diplomacy?

*asked on January 13, 2020* -
## math

19x^-2 why is this not a monomial? thank you

*asked on January 7, 2020* -
## math

why is 19x^-2 not a monomial thank you

*asked on January 7, 2020* -
## math

-7x^2+6x+3=0 how many real number solutions does the equation have can you explain it by doing it...i don't get it...baby steps please thank you

*asked on December 19, 2019* -
## algebra

solve the absolute value equation 3{2x-2} + 8 = 20 Help (with baby steps please) I know answer is x=-1 or x=3 ( I get the 3 but not the -1) thank you again

*asked on December 19, 2019* -
## algebra

-7x^2+6x+3=0 why are there 2 solutions for this one? Please and thank you so much

*asked on December 19, 2019* -
## algebra

how many real number solutions does the equation have? -8x^2-8x-2=0 the answer is 1, but why please and thank you

*asked on December 19, 2019* -
## Algebra

Why is (-5i) ( 6i) positive 30? Thank you

*asked on December 19, 2019* -
## BioMedicine

54) The suspension of virus has a concentration of 250 ng/uL. What would be the concentration in the third test tube? A. 25 ng/ul B. 2.5 ng/uL C. 0.25 ng/uL D. 0.025 ng/uL why is the answer C? thank you

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

Where would 18,0 be on a grid

*asked on December 12, 2019* -
## algebra

thank you in advance An x by x square is cut from each corner of a rectangular sheet of cardboard that is 13 inches wide and 17 inches long. The sides are then folded up to form a box. 1.Write an equation to represent the volume of the box. 2.To the

*asked on December 11, 2019* -
## algebra

I don't understand the answer: Identify the transformations of the graph of ƒ (x) = x 3 that produce the graph of the given function g (x). Then graph g (x) on the same coordinate plane as the graph of ƒ (x) by applying the transformations to the

*asked on December 10, 2019* -
## algebra

--I don't get the compression part ( I know it has to do with the first number/ term..the a part) Identify the transformations of the graph of ƒ (x) = x 3 that produce the graph of the given function g (x). Then graph g (x) on the same coordinate plane as

*asked on December 10, 2019* -
## algebra

Identify the transformations of the graph of ƒ (x) = x 3 that produce the graph of the given function g (x). Then graph g (x) on the same coordinate plane as the graph of ƒ (x) by applying the transformations to the reference points (-1, -1), (0, 0) ,

*asked on December 10, 2019* -
## algebra

I don't understand the answer..thank you How is the graph of g(x)= -(2x)^3 related to the graph pf f(x) = x^3 answer: the graph of g(x) is a horizontal compression of the graph of f(x) by a factor of 1/2 and a reflection across the x axis.

*asked on December 10, 2019* -
## algebra

Identify the transformations of the graph of ƒ (x) = x 3 that produce the graph of the given function g (x). Then graph g (x) on the same coordinate plane as the graph of ƒ (x) by applying the transformations to the reference points (-1, -1), (0, 0) ,

*asked on December 10, 2019*