# samantha

Popular questions and responses by samantha-
## chemistry

what volume (in ML) of a 0.150 M HNO3 solution is required to completely react wtih 35.7 mL of a 0.108 M Na2CO3 solution according to the following balanced chemical equation? Na2CO3(aq) + 2 HNO3(aq) --> 2NaNO3(aq) + H2O(l) then, in the reaction above,

*asked on June 21, 2010* -
## Math

Sue left her home at 6 A.M. driving her car at the rate of 50 miles per hour. At 8 A.M. her brother Kevin drove after her along the same highway, traveling at the rate of 60 miles per hour, in how many hours did Kevin pass Sue? I got 10 hours but that is

*asked on July 24, 2018* -
## Trig Help Please

A smokestack is 200 ft high. A guy wire must be fastened to the stack 30.0 ft from the top. The guy wire makes an angle of 42.0° with the ground. Find the length of the guy wire.

*asked on May 7, 2017* -
## math

Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?

*asked on June 25, 2011* -
## english

Snow skiing is a very exciting sport. what type if sentence pattern is this? S-v,s-v-io, s-v-io-do,e-v-s,s-lv-pn,s-lv-pa, s-v-do-oc, question pattern

*asked on July 10, 2012* -
## science

Calculate the density of sulfur hexafluoride gas at 703 torr and 23°C. density is mass/volume so how do i get those from what i am given? also ) Calculate the molar mass of a vapor that has a density of 6.735 g/L at 11°C and 743 torr.

*asked on December 15, 2012* -
## CALCULUS. Check my answers, please! :)

The domain of f(x)=(1)/(sqrt(x^2-6x-7)) is (1, 7) [-1, 7] x > -1 or x < 7 ***{x < -1}U{x > 7} (-∞, -1]U[7, ∞) 2. In which of the following is y a function of x? I. y^2=9-x^2 II. |y|=x III. y=(sqrt(x^2))^3 I only II only III only ***I and III only I, II

*asked on October 5, 2013* -
## Calculus, check my answers, please? :)

Okay, so I think these are right, but I would appreciate if someone could check them and tell me if something is wrong and what the right answer is. I'd also appreciate an explanation if possible. :)Thank you! 7. Given that f(x)={x^3 if x ≥ 0 {x if x < 0

*asked on October 2, 2013* -
## Calculus, check my answers, please! 3

Did I get these practice questions right? 1. Suppose that f is an even function whose domain is the set of all real numbers. Then which of the following can we claim to be true? ***The function f has an inverse f –1 that is even. The function f has an

*asked on October 2, 2013* -
## Pre calc

An equation is given. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. Find All solutions of the equation 2sin(theta/3)+ square root three =0

*asked on April 19, 2017* -
## Mathematics

A drug response curve describes the level of medication in the bloodstream after a drug is administered. A surge function S(t) = At^(p)e^(−kt) (where t > 0) is often used to model the response curve, reflecting an initial surge in the drug level and then

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

what volume (in L) of 0.150 M KCl solution is required to completely react with 0.150 L of a 0.175 M Pb(NO3)2 solution according to the following balanced chemical equation? 2KCl (aq) + Pb(NO3)2 (aq) --> PbCl2 (s) + 2 KNO3 (aq)

*asked on June 21, 2010* -
## Math

A football team lost 9 yards on each of three consecutive plays. What was the team's total change in position for the three plays?

*asked on September 14, 2017* -
## English

1. All of the following quotes from "The Swimming Contest" are intended to foreshadow the future conflict between the narrator and Abdul-Karim EXCEPT A. "But it's not true that we're driving the Arabs out. We are out for peace, not war."***** B.

*asked on May 12, 2017* -
## mat222

Suppose that the function h is defined, for all real numbers, as follows. =hx −4 if x2 Find h0 , h2 , and h5 .

*asked on March 15, 2017* -
## Check my CALCULUS answers please!

Any short explanation for things I got wrong would be great, too, if possible! Thanks in advanced! :) 8. Which of the following functions grows the fastest? ***b(t)=t^4-3t+9 f(t)=2^t-t^3 h(t)=5^t+t^5 c(t)=sqrt(t^2-5t) d(t)=(1.1)^t 9. Which of the following

*asked on October 7, 2013* -
## Math

The illumination of an object by a light source is directly proportional to the strength of the source and inversely proportional to the square of the distance from the source. If two light sources, one four times as strong as the other, are placed 11 ft

*asked on November 14, 2011* -
## US Government

What language is used to describe the role of the Senate in Supreme Court nominations

*asked on August 21, 2009* -
## Writing Skills Part 4

2.which of the following would most likely be an entry in a topic outline? A.Toys can be gender - neutral. *B.Toys children love C.Quality toys should require some imagination D.It's possible for toys to be both educational and entertaining. Thank you for

*asked on March 2, 2015* -
## Calculus - Limits. Check my answer, please! :)

Suppose that h(x)={x^2-x+5 if x2 Which of the following is equal to 7? I. lim h(x) x->2- II. lim h(x) x->2+ III. lim h(x) x->2 I only II only ***III only I and II only I, II, and III

*asked on October 6, 2013* -
## Genetics

If a man with blood type B, one whose parents had blood type O, marries a woman with blood type AB, what will be the theoretical percentage of their children with blood type B?

*asked on May 8, 2019* -
## College Chemistry

Calculate the unknown of Ag+ if the potential of the following concentration cell is 300 mV at 25.0 C. Ag|Ag+(unknown)||Ag+(0.100M)|Ag I think I have to use Nernst Equation of Ecell=E0-.0592/nlogQ And at 25C is at 298K so i don't have to change anything. I

*asked on May 6, 2015* -
## Calculus, check my answers, please!

Could someone tell me if I'm right, and if not what the correct answer is? Thank you! I'd appreciate an explanation, too, if you could. :) 1. Suppose you're given the following table of values for the function f(x),and you're told that the function is

*asked on October 2, 2013* -
## Chemistry

Ethanol, C2H5OH, is mixed with gasoline and sold as gasohol. Use the following to calculate the grams of ethanol needed to provide 367 kJ of heat. C2H5OH(l) + 3 O2(g) ¨ 2 CO2(g) + 3 H2O(g) ƒ¢H = −1235 kJ

*asked on November 21, 2011* -
## college chemistry

What is the entropy change for the vaporization of 2.6 mol H2O(§¤) at 100◦C and 1 atm? dH= 40700 J/mol Answer in units of J/K

*asked on November 19, 2010* -
## Finance

Newdex has net income of $2,500,000 and 1,000,000 shares outstanding. It needs to raise $3,610,000 in funds for a new asset. Its investment banker plans to sell an issue of common stock to the public for $40 per share, less a spread of 5%. How much must

*asked on May 14, 2010* -
## science

Five lines in the H atom spectrum have the following wavelengths in Ǻ: a). 1212.7, b). 4340.5, c). 4861.3 d). 6562.8 and e). 10938. Three lines result from transitions to the nf = 2. The other two result from transitions in different series, one with nf =

*asked on April 1, 2010* -
## Genetics

Suppose that gene b is sex-linked, recessive, and lethal. A man marries a woman who is heterozygous for this gene. If this couple had many normal children, what would be he predicted sex ratio of these children?

*asked on May 8, 2019* -
## Physical education

What are the branches of physical education?

*asked on September 14, 2018* -
## Algebra

a theater wants to take in at least $2000 for a certain matinee. children's tickets cost $5 each and adult tickets cost $10 each. the theatre can seat up to 350 people. find five combinations of children and adult tickets that will make their goal.

*asked on January 4, 2016* -
## chemistry

Write a balanced equation for the reaction between perchloric acid and lithium carbonate.

*asked on April 14, 2015* -
## Math (Algebra/Pre-Algebra)

What is the 23rd term in the arithmetic sequence: 11, 14, 17, 20...? All I need is the formula to find the it because I have to show work. Thanks.

*asked on June 4, 2009* -
## Pre calc

Find all primary solutions (i.e. 0 ≤ θ < 2π ) of the equation cos(2θ ) = 4 − 3 cos(θ ). Find all primary solutions (i.e. 0 ≤ θ < 2π ) of the equation cos(2θ )cos(θ ) = sin(2θ )sin(θ ). Please can somone help and show all work Thank you

*asked on April 20, 2017* -
## Writing Skills Part 4

1.When creating a writing plan,which of the following should come first? *A.Material that will capture the reader's interest B.The first section of the body of the essay C.A brief summary of the conclusion 2.Which two things must be accomplished by the

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

What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?

*asked on February 2, 2015* -
## Geometry

Name all of the possible different rays that can be formed from the three points below: A B C

*asked on November 21, 2013* -
## Calculus - #6

If the following function is continuous, then what is the value of b? g(f)={2t^2+2t-24 if f≠3 {b if f=3 0 3 7 14 None of these If the following function is continuous, then what is the value of a? h(f)={2t+b if f(pi/2) 0 1 2 4

*asked on November 6, 2013* -
## English

1. Read the following passage from "The Swimming Contest." With a sigh my mother replies, "My husband's no longer alive, either. But his house and his father's house aren't here; everything remained over there, abroad, and I live in a rented apartment

*asked on May 12, 2017* -
## math

Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. how many strips does she make?

*asked on June 25, 2011* -
## Physics

What is the magnitude of the force per meter of length on a straight wire carrying an 8.50 -A current when perpendicular to a 0.55 -T uniform magnetic field?

*asked on April 6, 2011* -
## Math

Solve the system of equations using Row Operations x + y - z = 6 3x - 2y + z = -5 x + 3y - 2z = 14

*asked on May 9, 2018* -
## math

Name the property of real numbers illustrated by the equation -3(x+4)=-3x-12

*asked on January 24, 2018* -
## English

1. Identify the correctly punctuated sentence. A. Monarch butterflies migrate long distances each year—other butterflies live in southern climates throughout the year. B. Monarch butterflies migrate long distances each year, other butterflies live in

*asked on May 12, 2017* -
## social studys

what was the purpose of the war production board A. to tell factories how many planes or tanks each factory had to produce. B. to help factories shift from making consumer goods to making war materials.****** C. to ship war materials over to the allies D.

*asked on March 6, 2017* -
## College algerba

The half-life of a certain radioactive element is about 1500 years. After 2800 years, what percentage P of a sample of this element remains?

*asked on November 14, 2016* -
## algebra

If x2 = 20, what is the value of x? ±square root of 10 ±square root of 20 ±10 ±40

*asked on October 7, 2015* -
## algebra

A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, "How many gold coins do you have?" After pausing a moment, he replied, "Well! If I divide the coins into two unequal numbers, then 25 times

*asked on September 9, 2015* -
## maths

express 40% of right angle into radian measure. express two third of straight angle into radian. express sum of angles of a quadrilateral intoradian.

*asked on March 17, 2015* -
## Biology

1.Which of the following is a renewable resource? A.wind B.fossil fuel C.minerals (D.land) 2.The goal of -------is to use cells and tissues to treat human illnesses or injuries. A.clone therapy B.therapeutic cloning (C.reproductive cloning ) D.gene therapy

*asked on March 4, 2015* -
## Writing Skills Part 3

1.Under the Library of Congress system,where would you begin to research for books on the legal system of Greece? A.E B.k C.U [ D.G] 2. You've located three books on a topic you're researching for an essay.The first thing you should do in determining if

*asked on March 2, 2015* -
## Geometry

Three vertices of a kite are (1,8), (1,0), and (4,6). What is the fourth vertex?

*asked on November 24, 2013* -
## Physics

A 61-kg snow skier is being pulled up a 14 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.0 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.1 x 10-4 m. A

*asked on November 23, 2013* -
## Statistics

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Identify the design of the study. A) Paired t-test

*asked on November 21, 2013* -
## chem

Which member in each pair has the stronger intermolecular dispersion forces? CH3CH2CH2I or CH3CH2I or neither? how do you know this

*asked on January 9, 2013* -
## chemistry

Arrange the following oxides in order of increasing acidity: P2O5, As2O5, N2O5, SnO2, SeO3, and BaO. (Use the appropriate symbol to separate substances in the list.) I have no idea how to do this! please help!

*asked on November 25, 2012* -
## algebra

The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.

*asked on November 7, 2012* -
## elements of design

1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans serif type C. Bold italic sans serif type(my answer) D. Bold roman serifed type 2. Which one of the

*asked on February 7, 2012* -
## statistic help

Z score for worlds tallest man- Bao Xishun is the worlds tallest man with a height of 92.95 inch(or 7ft,8.95 inch).men have heights with a mean of 69.6 in. And a standard deviation of 2.8 in. 1. Convert Boa's height to a z score? 2. Does Boa's height meet

*asked on September 18, 2011* -
## world history

which kingdom controlled caravan trade routes in A.D.900?

*asked on June 29, 2011* -
## chemistry help!

A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?

*asked on December 1, 2010* -
## Chemistry

When ammonium chloride is dissolved in water, the solution becomes colder. What can you say about the relative magnitudes of the lattice energy of ammonium chloride and its heat of hydration? Why does the solution form? What drives the process?

*asked on September 20, 2010* -
## Chem

Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to

*asked on February 24, 2009* -
## Physical education

What are the branches of physical education?

*asked on September 14, 2018* -
## math

Use the quadratic formula to solve the equation -x^2 + 7x = 8

*asked on January 24, 2018* -
## social studys

Compare and contrast the rise and fall of Germany and japan during the period of world war Il Please help me with this.

*asked on March 20, 2017* -
## biochemistry

Which statements about hydrogen bonds are correct? 1) Hydrogen bonds are the interaction between a hydrogen atom bonded to an electronegative element and the lone pair of electrons on a nearby electronegative atom. 2) The atom to which the hydrogen atom is

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

a wire is bent to form four semicircles all with diameters of 32 cm, how long is the wire? round to the nearest hundredth

*asked on May 7, 2016* -
## Math

Hi y’all, me again. Can you help me on this? I got some answers, and I hope they are all right. Please let me know! Thanks! :) 1.2(y + 1) for y = 2 A. 6 B. 5 C. 7 D. 8 Is it “A”? 2. The cost in dollars of a school banquet is 74 + 12n, where n is the

*asked on December 7, 2015* -
## Math

Why does Zara have a good driving record?

*asked on September 1, 2014* -
## Calculus

Which of the following is a separable, first-order differential equation? A) dy/dx= x+y/2x B) dy/dx=x+y/x-y C) dy/dx=sinx

*asked on May 8, 2014* -
## Math

A rose garden is designed by joining a rectangle and a semicircle, as shown below. The rectangle is 29ft long and 17ft wide. If the gardener wants to build a fence around the garden, how many feet of fence are required? (Use the value 3.14 for pi, and do

*asked on April 18, 2013* -
## Discrete Math

With 50 pennies in three jars labeled A, B and C, how may ways can you put the pennies in the jars assuming they are identical with at least two pennies in each jar?

*asked on October 27, 2011* -
## geometry

The area of a triangular garden can be no more than 120 feet square feet. The base of the triangle is 16 feet. What is the height of the triangle?

*asked on August 31, 2011* -
## Genetics

Both Mrs. Smith and Mrs. Jones had babies the same day in the same hospital. Mrs. Smith took home a baby girl, whom she named Shirley. Mrs. Jones took home a baby girl, whom she named Jane. Mrs. Jones began to suspect, however, that her child had been

*asked on May 8, 2019* -
## math

The Nuthouse offers a mixture of soy nuts and almonds. Almonds sell for $7 per pound and soy nuts sell for $5.50 per pound. The Nuthouse will make 20 pounds of the mixed nuts and sell the mixture for $5.95 per pound. The following equations represent the

*asked on September 25, 2017* -
## Physics

An object consists of 5 masses, each of mass m, connected by massless rods. The two short rods have length L and the two long rods have length 2L. What is the moment of inertia about an axis perpendicular to the diagram (out of the page) and through the

*asked on November 10, 2016* -
## Math calculation

A stock bottle contains 2.5 L of solution. How many 2 oz bottle can be filled using the stock solution?

*asked on May 14, 2016* -
## Math

which of the following can represent the measure of the three angle in an acute triangle? A. 59, 61,62 B. 30, 25, 125 C. 56,72,52•• D. 90, 45, 45 Plz correct me!!

*asked on January 27, 2016* -
## langauge arts

Which of the following forms of poetry expresses the thoughts and feelings of a single speaker, often in highly musical verse. Limerick my answer Free verse Haiku Lyric Which of the following pairs of poetry elements best help the reader to identify the

*asked on January 19, 2016* -
## History...Please Help

PHOENIX, Sept. 20, 2012- Arizona's new immigration law takes effect this week. According to the law, police officers must check the status of anyone who may be an undocumented immigrant. Officers have the right to decide who is checked under this law. A

*asked on November 20, 2015* -
## chemisty

A cylinder with a moving piston expands from an initial volume of 0.350L against an external pressure of 2.70atm . The expansion does 251J of work on the surroundings. What is the final volume of the cylinder?

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

Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydrobromic acid and aqueous potassium sulfide.

*asked on April 14, 2015* -
## Criminal Justice

16. Conviction rates for indigent defendants and those with their own lawyers were about the same in Federal and State courts. About __________% of Federal defendants and __________% of the defendants in the most populous counties were found guilty

*asked on March 22, 2015* -
## Criminal Justice

15. Which of the following is not an example of an ethical dilemma a defense attorney may face? A) the prosecutor's winning record. B) client perjury. C) defense receipt of physical evidence. D) a confession in confidence.

*asked on March 22, 2015* -
## physics

A charge q1 is inside a spherical surface (although not necessarily at the exact center of the sphere). A second charge q2 sits just outside the surface. Choose whether the following statements are true or false. T/F The total electric flux through the

*asked on March 6, 2015* -
## Calculus

1. If y′= x(1+ y) and y > -1 , then y= A) y=sinx B) y=3x^2+C

*asked on May 9, 2014* -
## Statistics

smith is a weld inspector at a shipyard. he knows from keeping track of good and substandard welds that for the afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completed that shift, would it be unusual for

*asked on December 1, 2013* -
## Check my CALCULUS work, please! :)

Question 1. lim h->0(sqrt 49+h-7)/h = 14 1/14*** 0 7 -1/7 Question 2. lim x->infinity(12+x-3x^2)/(x^2-4)= -3*** -2 0 2 3 Question 3. lim x->infinity (5x^3+x^7)/(e^x)= infinity*** 0 -1 3 Question 4. Given that: x 6.8 6.9 6.99 7.01 7.1 7.2 g(x) 9.44 10.21

*asked on November 11, 2013* -
## Physics

You stick a paper onto a fridge with a magnet. There are two free body diagrams, one for the paper and one for the magnet. What are the forces acting on each object, which way do they point?

*asked on November 3, 2013* -
## Calculus, please check my answers!

1. Evaluate: lim x->infinity(x^4-7x+9)/(4+5x+x^3) 0 1/4 1 4 ***The limit does not exist. 2. Evaluate: lim x->infinity (2^x+x^3)/(x^2+3^x) 0 1 3/2 ***2/3 The limit does not exist. 3. lim x->0 (x^3-7x+9)/(4^x+x^3) 0 1/4 1 ***9 The limit does not exist. 4.For

*asked on October 7, 2013* -
## Calculus help, please! :)

Consider the table of data for the function g(x),below: x: 2.9, 2.99, 2.999, 3.01, 3.1 g(x):4.41, 4.9401, 4.994, -5.006, -5.0601, -5.61 From the data given, it would appear that the lim g(x) x->3 is likely to be:

*asked on October 6, 2013* -
## english

Combine the sentences by changing the italicized word group to an infinitive or infinitive phrase. Then write the complete sentence in the paragraph box. The journalist took a job in the hotel. This way he would get facts for an article. I got it wrong. I

*asked on June 3, 2013* -
## Chemistry

I need help with this in order to correctly complete my other related problems. Thank you so much in advance =) Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO, HCl, HCN,

*asked on April 15, 2012* -
## Algebra

triangular prism with base perimeter 24 cm, base area 24 cm^2, and height 15 cm. Choices are: A. 606 cm^2 B. 384 cm^2 C. 408 cm^2 D. 87 cm^2

*asked on March 19, 2012* -
## statistics

assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. find the probability that a randomly selected adult has an IQ less than 20.

*asked on March 14, 2012* -
## psychology

One common mistake made in a persuasive paper is taking one side to the extent that the writing becomes biased. How does a persuasive essay differ from a biased essay?

*asked on October 9, 2011* -
## history

How is that Buddhism declined after the Muslim invasions while Hinduism survived?

*asked on May 14, 2011* -
## Chemistry (really need quick help)

Balance the following equations. (Use the lowest possible coefficients. These may be zero.) (a) As(s) + ClO3-(aq) ---> H3AsO3(aq) + HClO(aq) (acidic solution) I am using half-reactions but I don't really get this at all. Can someone explain?

*asked on May 5, 2011* -
## science

how do you write the chemical equation for liquid pentanol (C5H12O) and gaseous oxygen ? Thanks ~Samantha~

*asked on November 29, 2010* -
## Math

I'm really struggling with how to set this up: A company has 18 members on its management team,10 men and 8 women. There is a conference in Hawaii, and the company decided to send 5 people. If the selection of five people is random, find the following

*asked on November 4, 2010*