Tuesday

April 28, 2015

April 28, 2015

Number of results: 39,785

**Math**

Given: f(x)=2+x g(x)=sqrt(x-7) h(x)=2x^2-5 Determine: g(h(x)) This is what I've got so far: f(x)=2+x g(x)=sqrt(x-7) h(x)=2x^2-5 g[h(x)]=sqrt(h(x)-7) And I don't know if that's right or not >_< Please help!
*July 28, 2009 by Anna*

**SCIENCE**

HOW CAN YOU DETERMINE THE NUMBER OF NEUTRONS AN ATOM HAS FROM AN ATOMS MASS NUMBER AND ITS ATOMIC NUMBER
*December 18, 2009 by SPOOKY*

**arithmetic**

determine the A.P whose fourth term is 18 and the difference of the ninth term from the fifteenth term is 30.
*February 27, 2012 by shabna*

**Chemistry**

Determine the boiling point(bp)of 0.44 m Naphthalene, C10H8, in Benzene, C6H6. kb(C6H6)=2.53, bp(C6H6)=80.1
*February 11, 2013 by Shelly*

**Pre-calculus**

Find the critical point of the function y=-2(x-1)^2-3. Then, determine whether the point represents a maximum, a minimum, or a point of inflection.
*August 23, 2008 by Lucy*

**Pre-calculus**

Find the critical point of the function y=-2(x-1)^2-3. Then, determine whether the point represents a maximum, a minimum, or a point of inflection.
*August 25, 2008 by Lucy*

**Chemistry**

determine the final temp when 45.8 g of aluminum at -5.2 degrees C is added to a mixture of 45.0 grams of ice at 0.00 degrees C and 2000.0 g of water at 95.0 degrees C.
*November 20, 2009 by Brittany*

**Physics**

Hillary kicks a ball so that it is in the air for 3.2 s. The ball lands down field 56 m from its starting point. a. Determine the x and y velocities of the ball.
*October 10, 2010 by katelyn*

**com156**

How might you determine what is fact and what is opinion? Does the opinion of an expert in the field carry more weight than the opinion of someone that is not? Explain why or why not
*October 30, 2010 by Anonymous*

**Chemistry**

Can the 5% approximation be used to determine the pH of the following solutions? How do I do this question? (A) 0.56 M hypochlorous acid - yes (B) 3.00 M nitrous acid - yes (C) 0.010 formic acid - no
*December 15, 2010 by LISA*

**chemistry**

A solution is prepared by dissolving 23.7g of CaCl2 in 375.0g of water. The density of this solution is 1.05g/mL. determine the concentration (molarity) of Cl in solution.
*March 14, 2011 by jim*

**Math**

One card is selected from a deck of playing cards. Determine the probability of selecting: a card greater than 9 or a black card.
*July 26, 2011 by Jen*

**science**

a particle travels in a straight line ,such that for a short time 2s<t<6s its motion is described by v=(4/a)m/s where a is in m/s^@. if v=6m/s when t=2s,determine the particle the particle's acceleration when t=3s
*June 28, 2012 by bk4*

**math**

) Determine whether the following two planes x + 4y − z = 7 and 5x − 3y −7z = 11 are parallel, orthogonal, coincident (that is, the same) or none of these.
*April 22, 2014 by Carrolyn*

**math**

determine known length for a triangle one side is 2.5cm other side 1.6cm find how solve the third side
*October 9, 2014 by anita*

**Math**

Here is the math problem. 150 is 75% of what number? I know the rate is 75 percent and the base is 150. I am looking for the amount. My questions is how to find the answer? Do I divide? Okay maybe I am missing a huge section as to finding the answer to this question. I went ...
*June 28, 2007 by marinda*

**Algebra**

1. (2x-6)/(21) divided by (5x-15)/(12) 2. Solve (x)/(x-9)-4=(9)/(x-9)..I got -6, is that correct? 3. Add. Express your answer in simplest form...(4)/(s)+(6)/(s^2).. 4. Add. Express your answer in simplest form...(x^2)/(x+4)+(8x+16)/(x+4) Lets check you number 2) -6/(-15) - 4= ...
*May 27, 2007 by Helpless in Math*

**CHEMISTRY**

Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm) 1.032 atm Using this data...
*October 22, 2012 by Karina*

**math**

David Salter has a personal automobile policy ( PAP) with coverage of $ 25,000/$ 50,000 for bodily injury liability, $ 25,000 for property damage liability, $ 5,000 for medical payments, and a $ 500 deductible for collision insurance. How much will his insurance cover in each ...
*June 8, 2014 by tota*

**Hamlet**

This question is in regards to Hamlets to be or not be speech. Historians have noted that some of the most effective leaders in recent history, including some recent Presidents, have not been considered to be especially intelligent. They have made quick decisions and decisive ...
*April 19, 2011 by Emma*

**For Kristy - re Hamlet**

http://www.jiskha.com/display.cgi?id=1357147928 and http://satomko.hubpages.com/hub/Fortinbras-as-a-Foil-for-Hamlet Do. Not. Plagiarize. If you are not clear on what plagiarism is and how NOT to plagiarize from a source, read through this entire webpage from Capital Community ...
*January 3, 2013 by Writeacher*

**Math**

7th grade--how do I determine the slope of a set of stairs? Thanks you find it by measuring thr rise over the run i.e. the vertical distance divided by the horizontal distance. thanks
*May 7, 2007 by Ellen*

**Calc**

1. Determine an expression for dy/dt if x^2+2y^2=8 and dx/dt=3. 2. A point is moving along the right branch of a hyperbola defined by 4x^2-y^2=64. What is dy/dt when the point is at (5, -6) and dx/dt=3? I will start you on the first, using implicit differention. x^2+2y^2=8 2x ...
*May 8, 2007 by Icy*

**Geometry**

I have no idea how to solve this problem. The question says: Determine whether the points A(4,5), B(-3,3), C(-6,-13) and D(6,-2) are the vertices of a kite. Explain your answer. Can you please help me with the steps to solve it and understanding it.
*February 18, 2008 by Avalon*

**physics**

1.6 Determine the maximum weight of the flowerpot that can be supported without exceeding a cable tension of 50 lb in either cable AB or AC. Note that the 2 cables make an angle 60 and 53.1 respectively with the horizontal
*March 3, 2008 by shan*

**chemistry**

Determine the percent yield for the reaction between 98.7g of Sb2S3 and excess oxygen gas if 72.4g Sb4O6 is recovered along with an unknown amount of sulfur dioxide gas.
*March 7, 2008 by kate*

**data**

A die is thrown 20 times and a sucess is defined as on or a six on the upace of the die,. Use binomial distribution to determine the probability of getting exactly 5 successions in 20 trials
*October 8, 2008 by lin*

**physics**

The four tires of an automobile are inflated to a gauge pressure of 88500 Pa. Each tire has an area of 0.0276 m2 in contact with the ground. Determine the weight of the automobile. Answer in units of N.
*November 5, 2008 by Lines in the Sand122*

**Chemistry**

Usng the following balanced chemical equation, determine the limiting reactant in the reaction between 3.0 grams of titanium and 8.0 grams of chlorine gas? Ti(s) + 2Cl2(g) --> TiCl4(s)
*September 1, 2009 by Mercedes*

**Chemistry**

Ok this is for a lab we are doing for equilibrium and absorbance and concentration, so i dont know if anyone can answer this. Question: Describe how you plan to determine the temperature dependence of K sub c. Use a step by step process.
*September 23, 2009 by AJ*

**12th grade Advanced Functions**

A generator produces electrical power, P, in watts, according to the function: P(R)= 120/ (0.4 + R)^2 where R is the resistance, in ohms. Determine the intervals on which the power is increasing.
*October 25, 2009 by Anonymous*

**chemistry**

determine the percent by mass of all the elements in the compound magnesium sulfate heptahydrate? how do i start this? mg is 24.31 sulfur is 32.07 and 7 hydrogens for heptahydrate? add them up? 63.436. if i am doing this correctly what do i do next?
*November 28, 2009 by megan*

**math**

An amount of money is invested at 12%/a interest. Write an equation and solve it to determine the length of time it will take for the original amouunt to double if the interest is compounded annually.
*December 3, 2009 by Cyn*

**physics**

Four identical charges (+4.0 uC each) are brought from infinity and fixed to a straight line. The charges are located 0.33m apart. Determine the electric potential energy of this group.
*February 3, 2010 by Allee*

**Physics**

An electron is accelerated by a uniform electric field (1000 V/m) pointing vertically upward. use newton's laws to determine the electron's velocity after it moves .10 cm
*April 25, 2010 by Standard C.*

**Chemistry**

a student was asked to determine the components of a mixture of potassium bromide (KBr), magnesium hydroxide, Mg(OH)2, and barium sulfate (BaSO4). The mass of the sample of the mixture used was 3.21 g
*June 1, 2010 by holla*

**Algebra**

Determine the zeros of the function 3x^2 -8=10x. I know I rewrite it as 3x^2 -10x-8 = 0 But then what do I do-I'm totally confused-Answers are {-2,4} {2,4} {-2/3,4} {2/3,4} Please direct me or show the steps, just don't give me the answer because I still won't get it. Thank you
*September 28, 2010 by BethAnne*

**physics**

a 1.10 x 10 cubed kg car accelerates from rest for a time period of 5.0 sec. The magnitude of the acceleration is 4.60 m/s squared. determine the average power generated by the force that accelerates the vehicle
*November 16, 2010 by Derick*

**Science**

Consider 2 charged objects. One has a negative charge if 18 colombs. The 1 charges are seperated by a distance if 0.9 m and a force of -2.7 N exists between them. Determine the charge of the other object.
*January 30, 2011 by Musha*

**physics**

The buoyancy force on the 490 balloon is F = 6kN , and the air resistance is F_D = (100v)N, where is in m/s. Determine the terminal or maximum velocity of the balloon if it starts from rest. vmax = ?
*March 8, 2011 by Roshni*

**Math(Probability)**

The joint p.m.f. of X and Y is f(x, y) = 1/6, 0 ≤ x + y ≤ 2, where x and y are nonnegative integers. (a) Sketch the support of X and Y. (b) Record the marginal p.m.f.’s f1(x) and f2(y) in the “margins.” (c)Compute Cov(X, Y). (d)Determine ρ,the correlation ...
*April 27, 2011 by Alex*

**science**

How does mutation contribute to variation in a species? Evolution is the theory and natural selection is the process. Explain what this might mean. How can environmental factors determine a feature in a species?
*May 3, 2011 by sarah*

**biology**

I did a lab with catalase breaking down hydrogen peroxide. A question asks, what gas is being formed (oxygen), suggest a method I could use to determine this. I don't know any method?
*June 9, 2011 by Tone*

**physics**

Determine the vertical component of a baseball's velocity if the ball is thrown at 28 m/sec at an angle of 37 degrees with the horizontal. The answer is 21.2 m/sec but I have no clue on how to solve this problem.
*June 11, 2011 by confused*

**math**

a=16,00, r=11.5%, t=5 years determine the present value, p, you must invest to have the future value, a, at simple interest rate r after time t. round uo to nearest cent
*August 14, 2011 by marie *

**geometry**

How do I determine the length and width of a prism that has a height of 3 in, all edges are integers, the numerical values of the volume and of the surface area are equal and the volume is as small as possible?
*September 8, 2011 by Adam*

**Math - Calculus**

For the following arithmetic sequence: determine the common difference. Find the next three terms of the sequence. e) 2/3 , 1/15, -8/15 I really don't get how to solve this one, I see no pattern :\
*September 11, 2011 by Anonymous*

**physics**

A linear charge of nonuniform density lambda(x)=bx C/m, where b = 5.2 nC/m2, is distributed along the x-axis from 4.9 m to 6 m. Determine the electric potential (relative to zero at infinity) of the point y = 8.6 m on the positive y-axis.
*September 25, 2011 by Anonymous*

**chemistry**

350.ml of .25M KOH is reacted with 250.ml of .30M H3PO4. Determine which is the limiting reagent, the molarity of the salt formed, and the final molarity of the reactant that was in excess.
*September 26, 2011 by Ethan*

**science**

Determine the slope of an area, given the following: Start measuring at 700 feet. Measure a distance of four miles, and end at an elevation of 2432 feet.
*October 10, 2011 by jayy*

**Physics Honors**

A football is kicked with an initial velocity of 25 m/s at an angle of 45 degrees with the horizontal . Determine the time of flight, the horizontal distance, and the peak height of the long jumper.
*October 23, 2011 by Allison*

**Calculus**

The point A(-3, -5) is one the terminal arm of an angle feta. Determine the exact expressions for the primary trigonmetric ratios for the angle. Would that be 225 degrees. -2V2?
*October 24, 2011 by -Untamed-*

**statistics**

If one card is drawn from a standard 52 card playing deck, determine the probability of getting a jack, a three, a club or a diamond. Round to the nearest hundredth
*November 8, 2011 by ify*

**Chemistry**

The Lewis dot diagram for iodite (IO2-) is given below. Using your VSEPR information, determine the most likely molecular geometry (shape) for iodite.
*November 14, 2011 by Anonymous*

**Chemistry**

Given the following equation: N2(g) + 3H2(g) = 2NH3(g). Determine to one decimal place the molar mass of each term, and WRITE EACH ONE AS A CONVERSION from moles to grams.
*December 5, 2011 by Kate*

**Pre-Algebra**

determine whether each statement is sometimes, always, or never true: 1) a whole number is an integer. 2) a repeating decimal is a real number. plz help me..... tnx
*February 1, 2012 by Me PLZ HELP!!!! TNX*

**geometry**

A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground to the nearest degree.
*February 2, 2012 by meghan*

**College algebra**

I would like to build a fench for my poodle 8 feet long and 4feet high. What is the inches, feet yards and miles or meters. and determine the perimeter.
*February 15, 2012 by Beatrice Poles*

**physics**

A 650 N student is Rollerblading at a velocity of 7.8 m/s [W] when the student trips and slides horizontally along the trail, coming to a stop 0.95s. Determine the students average acceleration
*April 5, 2012 by Melissa*

**math**

A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground, to the nearest degree.
*April 23, 2012 by Sally*

**Math**

The heights h of two-thirds of the members of a population satisfy the inequality |h-68.5/2.7|≤1 where h is measured in inches.Determine the interval on the real number line in which these heights lie.
*May 1, 2012 by cher*

**Calculus exam review, PLEASE HELP!!**

for each function, determine the equation of the tangent line to the graph for the indicated value of the variable. a) y = 3cosx + 4sinx + 1 , when x = pie b) y = x - 3cosx , when x = (5pie)/3
*June 21, 2012 by stephanie*

**math**

Determine the comparable interest rate for a $50,000 loan when the quoted information is 11.8% + 0.5 pt + $300. (Round your answer to two decimal places.) 1 % i came up with the answer 8905%
*August 25, 2012 by Anonymous*

**physics**

Two boxes of fruit on a frictionless horizontal surface are connected by a light string as in the figures below, where m1 = 10 kg and m2 = 19 kg. A force of 46 N is applied to the 19 kg box. (a1) Determine the acceleration of the boxes
*October 4, 2012 by Anonymous*

**chemistry characterization & analysis of aspirin**

write a balanced equation that describes an acid base reaction that would allow you to determine the moles of aspirin present in a sample
*November 13, 2012 by molly*

**Chemistry**

Determine the end value of n in a hydrogen atom transition, if the electron starts in n=4 and the atom emits a photo of light with a wavelength of 486 nm. *The answer given is 2, but I don't know how they got there.
*November 15, 2012 by Danya*

**Math**

A tree that is 100 feet tall casts a shadow that is 150 feet long. Determine the angle at which the rays of the sun hit the ground, to the nearest degree.
*December 11, 2012 by Junior*

**Chemistry**

if you have a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solute ?explain I am not sure of how to answer this question please some help!
*January 9, 2013 by Anonymous*

**Chem 201**

Determine the empirical formula for a compound containing only c,h given that combustion of 1.50g sample of the compound produces 4.71g CO2 and 1.93g H2O
*March 21, 2013 by Anonymous*

**Chemistry**

I was just wondering how I would determine the pKb of a weak base that was titrated with a strong acid on a titration curve at the EQUIVALENCE POINT. And from this, how would I find the pH? PLEASE HELP!!
*March 28, 2013 by TC*

**Algebra**

Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +...
*April 8, 2013 by Becca*

**statistics **

A test has 1 true false question and 2 multiple choice questions(A B C D). Draw a tree diagram and determine the sample space for the possible ways to answer the test.
*May 5, 2013 by janae*

**Physics (Kinematics)**

An airplane accelerates down a runway at 100 m/s2 for 15 s until it finally lifts off the ground. Determine the distance traveled before take-off.
*August 13, 2013 by Ashley*

**st.xavier**

Determine the horizontal force P required to start the movement of the 200 lb blockup the 300inclined surface. The static coefficient of friction between the inclined surface and the block is ms = 0.25.
*September 16, 2013 by pankaj*

**college physics**

A rod 14.0 cm long is uniformly charged and has a total charge of -20.0 ÂµC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from its center. N/C
*September 21, 2013 by vishal*

**statistic**

A linear model for a set of data was y = –20.6 + 9.72x and produced the following residual plot: [Xscl = 1, Yscl = 5] Scatterplot a) Predict the value of y when x = 7.5. b) Determine the residual if x = 5. (2 points)
*December 15, 2013 by Helen*

**Physics**

An electron is released between two metal plates 40.0mm apart experiences an acceleration of 1x10^12m/s^2. Determine the potential difference across the plates.
*December 16, 2013 by Dean*

**Physics**

If a 65 kilogram load was raised 6 meters in 60 seconds determine the minimum rated wattage of the motor needed to accomplish this assuming the motor is 75% efficient. give your answer in W.
*January 31, 2014 by Joe*

**physics**

A ball is projected horizontally from the top of a 98m high cliff with an initial speed of 14.4 m/s. Determine the magnitude of the final speed the instant prior to hitting the ground
*May 16, 2014 by tenzin*

**math**

A newlywed couple bought a washer and dryer for $800. They paid 5% down and then paid 12 monthly payments of $65.41. Determine the APR of the loan to the nearest tenth of a percent.
*June 24, 2014 by Jennifer*

**Physics**

The mass of the Earth=Mg=5.97x10^24 kg. The radius of the Earth=RE= 6.38 x10^6 m. A) What is the weight of the 75 kg person? B) Determine the acceleration due to gravity aboard a space shuttle at an altitude of 400km.
*September 21, 2014 by Jason*

**Physics**

Little Timmy falls down a well and hits the water 1.5s later. Determine the distance from the top of the well to the water below. Just an equation would be fine. Thanks in advance.
*October 1, 2014 by Selena*

**Chemistry please help **

A 1.516 M soltion is made by dissolving 1.570 g of the compound in 0.2238 mol of water. Determine the molar mass and apparent molecular formula of the compound.
*November 5, 2014 by Anonymous*

**chemistry**

the frequency factor and activation energy for a chemical reaction ate A=4.8 x 10^-12cm^3 and Ea=11.1kJ/mol at 327 K respectively. Determine the rate constant for this reaction at 327K
*November 11, 2014 by kimberly*

**micro economic**

a monopoly firm is faced with the following demand functio P=13-0.5Q the marginal cost function is given by 3+4Q and a fixed cost is 4 determine the profit maximization formula
*December 1, 2014 by Nairobi university*

**chem please help drbob222**

why can't gravimetric analysis be used to determine the concentration of sodium nitrate (NaNO) in a solution? I think the answer is because NaNO dissolves in water. Am I correct
*December 2, 2014 by Morgan *

**Finance**

Determine the annual net cost of these checking accounts: a. Monthly fee $4, check-processing fee of 20 cents, average of 23 checks written per month
*February 5, 2015 by John*

**physics**

A positively charged solid sphere of radius 100 mm has a uniform volume charge density of 250 nC/m^2. Determine the electric field (a) 20 mm, (b) 90 mm, and (c) 110 mm from the center of the sphere.
*February 5, 2015 by Dylan*

**Calc**

A plane is heading on a bearing of 200° with an air speed of 400 km/h when it is blown off course by a wind of 100 km/h from the northeast. Determine the resultant ground velocity of the plane.
*February 21, 2015 by Amy*

**Pre-Calculus**

Determine a quadratic function in vertex form given each set of characteristics. * minimum value of -24 and x-intercepts at -21 and -5 I have: (-21,0) and (-5,0) How would I find the x-coordinate of the vertex? (Thank you)
*March 10, 2015 by Lucina*

**Physics**

The current flowing in a solenoid that is 20.9 cm long and has a radius of 2.40 cm and 552 turns decreases from 3.51 A to 1.03 A in 0.250 s. Determine the magnitude of the induced electric field inside the solenoid 1.20 cm from its center.
*April 4, 2015 by Kayla*

**Math**

In interviewing November's statement she notices that her beginning balance was $600 and that she made a $200 payment on November 10. She also charged purchases of $80 on November, 5, $100 on November 15, and $50 on November 30. She paid $5.27 in interest the month before. ...
*July 7, 2014 by Chol*

**biology**

Smithers thinks that a special juice will increase the productivity of workers. He creates two groups of 50 workers each and assigns each group the same task (in this case, they're supposed to staple a set of papers). Group A is given the special juice to drink while they work...
*September 5, 2013 by loli*

**Statistics**

Suppose that you are designing an instrument panel for a large industrial machine. The machine requires the person using it to reach 2 feet from a particular position. The reach from this position for adult women is known to have a mean of 2.8 feet with a standard deviation of...
*August 5, 2014 by Lamont Sanford*

**Career and education**

Describe the educational background/training necessary for that career. For example: 2-year college degree, Bachelor’s degree, graduate degree. What post-secondary routes could you take to get to that career? For example: attend a 2-year community college and transfer to a 4-...
*October 30, 2014 by Monkey55*

**Scientific Method**

Put the following in the correct order. Report results Determine if hypothesis is true Do background research Construct a hypothesis Collect data Analyze results and draw conclusions Design and implement an experiment State the problem / ask questions Correct Order State the ...
*September 16, 2014 by Please Help*

**Physics**

Ironman steps from the top of a tall building. He falls freely from rest to the ground a distance of h. He falls a distance of h/ 3 in the last interval of time of 1.1 s of his fall. Hint: First, compute the velocity when Ironman reaches the height equal to the distance fallen...
*October 22, 2010 by Trevor*

**English**

1. The work is too difficult to do. 2. The work is so difficult that I cannot do it. (Does #1 mean #2? Are both the same?) 3. Mother Teresa...... (Why do you use 'Mother' before Teresa, the famous nun who passed away?) 4. I hope to be a scientise. 5. I hope that I will be a ...
*October 11, 2008 by John*

**science-chem- theory questions**

please, help me.. i think i know the answers, but i just want to make sure! i'd love your feed back :) 1) an air bubble is trapped in the tip of a buret before a titration. during the titration, the bubble is passed from the buret tip. will the reported volume of titrant used ...
*March 22, 2011 by sarah*

**English**

Sonia, a fellow employee and friend, repeatedly shows up late for work. You and others have covered for her in the past, but some people are beginning to resent her tardiness and several have made comments to her about about it. However, she has not responded to peer pressure ...
*March 11, 2011 by Natlie*