Tuesday

May 3, 2016
Total # Posts: 1,875

**Chemistry**

Calculate the standard free-energy change for the following reaction at 25 °C. Standard reduction potentials can be found here. 2Au^3+(aq) + 3Cr(s) <-----> 2Au(s) + 3Cr^2-(aq)
*April 28, 2016*

**PreCal**

An airplane is traveling at 575 mph in the direction of S 83 degree W. The wind is blowing at N 35 degree W. What is the actual speed and direction of the plane?
*April 26, 2016*

**Life orientation**

By not giving money to the police when u are given a fine..
*April 21, 2016*

**Pre-Calc**

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be ∠x = 35° and ∠y = 45°, as shown in the figure. (Round your answers to two decimal places.)
*April 21, 2016*

**algebra**

A laptop computer is purchased for $5000 . Each year, its value is 70% of its value the year before. After how many years will the laptop computer be worth $300 or less
*April 16, 2016*

**Math **

A farmer has 36 feet of fence to build a pigpen. He is going to use one of the sides of his barn as a side to the rectangular enclosure. Determine a function A that represents the total area of the enclosed region. What is the maximum area that can be enclosed?
*April 14, 2016*

**chemistry**

Calculate the concentrations of all species present in a 0.100 M solution of weak polyprotic acid H3PO4. Ka1=7.5 x 10 ^-3, ka2 = 6.2 x 10 ^-8, Ka3= 3.6 x 10^-13 How the heck do I do this
*April 12, 2016*

**Math**

Kate won a bag of candy at a raffle. She gave 1/5 of the candy to her brother, 1/4 of the candy to her friend, and had 11 pieces left over. How many pieces did she give her Brother?
*April 7, 2016*

**Math**

There are 92 band students. For a concert, the stage is divided into four sections. 24 students sit on the left, 36 sit in the middle, 28 sit on the right, and 4 stand behind the others. What fraction of the band sits in the middle?
*April 5, 2016*

**Math**

. If there are 1050 students in a school and the ratio of boys to girls is 9:5, then what is the number of boys in the school?
*April 5, 2016*

**math**

You order a pizza. The pizza has a diameter of 14 inches and it is cut into 12 equal slices. You eat four slices, how much of the area have you consumed. How long is the remaining crust.
*March 27, 2016*

**sociology**

how does social structure shape individual action?
*March 10, 2016*

**chemistry**

How many kilojoules are required to melt 15g of ice at 0 degree celsius, and raise the temperature of the liquid that forms to 85 degree celsius?
*March 3, 2016*

**FINANCE**

You have just purchased a new warehouse. To finance the purchase, you’ve arranged for a 35-year mortgage loan for 75 percent of the $3,250,000 purchase price. The monthly payment on this loan will be $15,800. Requirement 1: What is the APR on this loan? (Round your ...
*February 28, 2016*

**sphy011**

A football game costumarily begins with a coin toss to determine who kicks off. The referee tosses the coin vertically upwards with an initial velocity of 5m/s and it takes 1.02s for it to be in the air. In the absence of air resistance 1.How high does the coin go above its ...
*February 21, 2016*

**psychology**

i need 2 examples of what researchers on the human genome project have already learned a bout the human genome
*February 7, 2016*

**Direct variation algebra 2**

If V varies directly as G, and V =36 when G =4. Find V when G =11
*January 9, 2016*

**english**

The world we have created Read the saying by Albert Einstein. How do you understand its meaning? Write 100-120 words of explanation. You may also refer to what the other participants write and agree or disagree with their opinion. You may score up to 15 points for your entry...
*January 8, 2016*

**algebra**

How do you write the expression for 5 less than the quotient of a number and 2. Here is my answer but the quotient part is confusing me. 5<?+2
*January 7, 2016*

**math written assignment help**

by the way this is actually a story problem in my text book so dont get so assuming that it is an assignment. its a simialr single "problem" to one I (figured out on my own thansk for the not so much help).
*December 11, 2015*

**math written assignment help**

I wasnt asking somone todo the assignment, i was asking for help on where to start with this problem in the beginning. I was not posting this to cheat, it is easier for the whole thing to be posted to know what it is about. never mind!!!! thanks for the help anyway!!
*December 11, 2015*

**math written assignment help **

A’s DJ service charges a $200 setup fee and $75 an hour after that. B’s DJ service charges no setup fee but costs $125 an hour. (4 points) Set up equations for both of the services using x and y. Determine the variables and provide an explanation for why you chose ...
*December 11, 2015*

**intro to algebra written assignment help**

dont be so rude!
*December 11, 2015*

**intro to algebra written assignment help**

Assume you are throwing a baseball up from the top of a building. The equation for the height of the ball, h, at time, t, is represented by the equation: h=-16t^2+64t+512 (5 points) After how many seconds does the ball reach 560 feet? Explain what your answer means. (5 points...
*December 11, 2015*

**math**

Assume you are throwing a baseball up from the top of a building. The equation for the height of the ball, h, at time, t, is represented by the equation: h=-16t^2+64t+512 (5 points) After how many seconds does the ball reach 560 feet? Explain what your answer means.
*December 11, 2015*

**Stat**

"Records show that 8% of all college students are foreign students who also smoke. It is also known that 50% of all foreign college students smoke. What percent of the students at this university are foreign?" I had that: P(A)=50 P(B)=? P(A|B)=8
*December 6, 2015*

**physics**

1) A 70 kg woman dives from a 2.5 m high diving board. The gravitational field strength is 10 N/kg. Describe whether she gains or loses gravitational potential energy, and calculate the change in gravitational potential energy
*December 6, 2015*

**Math**

How much is the total amount if an item costs $8.28 pr pound and they buy 13 1/3 pounds?
*December 1, 2015*

**Math**

Thanks to Ms Sue. I wasn't using the fraction correctly.
*December 1, 2015*

**Math**

One pound costs $8.28. What is the total cost of 10 1/3 pounds?
*December 1, 2015*

**physics**

So what was the answer?
*November 25, 2015*

**Physics**

A car, moving along a straight stretch of high- way, begins to accelerate at 0.0377 m/s2. It takes the car 34.3 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.
*November 23, 2015*

**Math**

Please help me with steps to work out the following problem. Simplist way possible. Mary needed different coloured balloons for decoration. She had $1.25 (Australian dollars) and spent it all on a number of white, red, and blue balloons. A white balloon costs $.10, a red one...
*November 21, 2015*

**Maths **

Jill spent 40% of her money . If she had €120 left , how much had she at the start ?
*November 18, 2015*

**geometry**

Parallel lines in space are coplanar. A. always B. sometimes C. never
*November 12, 2015*

**Statistics**

A bag contains 5 purple marbles, 7 yellow marbles, and 3 orange marbles. If two marbles are selected from the bag: What is the probability that an orange then a yellow are chosen with replacement?
*November 7, 2015*

**Physics**

A rock is launched off a table horizontally with a velocity of 10 m/s. If the table is 1.5 m above the floor, how long will it take for the projectile to hit the floor? What distance will the rock land in respect from the edge of the table? 2(1.5)/9.8=t^2. T=.553? What is the ...
*November 4, 2015*

**precalculus**

For what values of b will the line y=2x+b be tangent to the circle x^2+y^2=9?
*November 3, 2015*

**Algebra**

Mary is 15 years older than her niece Katie. In 10 years Mary is two times as old as Katie. How old are Mary and Katie now? How do I solve this (equation + work) Thank you!
*October 29, 2015*

**math**

break apart the addends to find the a sum 18+26=
*October 27, 2015*

**Math**

a 14.5 gas tank is 3/4 full. How many gallons will it take to fill? Please help me set this up. Thanks!!!
*October 20, 2015*

**Simple interest math**

How many years will it take to double an investment if the annual simple interest rate is 5.3%? Round to the nearest 10th.
*October 19, 2015*

**Science**

An air mass of 25°C with a dew point of 10°C has a starting elevation of sea level (0 meters) encounters a mountain range with a peak elevation of 3,000 meters above sea level. At what elevation is the Lifting Cloud Level?
*October 13, 2015*

**Math**

After 40 spins, Chris landed on red 18 times. What is the experimental probability of landing on red? What is the theoretical probability of landing on red? Right as a fraction in simplest form.
*September 22, 2015*

**algebra**

0.957 0.912 0.925 0.886 0.920 0.958 0.915 0.914 0.947 0.939 0.84 mean=
*September 16, 2015*

**math**

thank you!!!!!
*September 16, 2015*

**math**

smallest to largest
*September 16, 2015*

**math **

0.957, 0.912, 0.925, 0.886, 0.920, 0.958, 0.915, 0.914, 0.947, 0.939, 0.84 how do i put these in order
*September 16, 2015*

**Math**

89 but if it was .886 wouldn't it be 86 cents?
*September 16, 2015*

**Math**

what is greater 0.84 or 0.886
*September 16, 2015*

**college algebra**

A worker is exposed to 98 dB for five hours and 82 dB for a three hours, giving an eight hour working day. On average what noise level is this worker exposed to? (round to the nearest whole number)
*September 16, 2015*

**Math**

The following points show how many centimeters a bamboo plant can grow (g) and the hours (h) that the plant has been growing. What is k?(g,h) (10,50) (20,100) (50,250)
*September 15, 2015*

**Nutrition**

Write equations to show how 2-methyl-1-pentene could be converted to 2-hydroxy-2-methylpentane 1-hydroxy-2-methylpentane
*September 9, 2015*

**physics**

A man is standing beneath two rain clouds, equidistant from each cloud, as shown in the figure. Cloud A has an excess of 7.1 104 negative charges while cloud B has 7.1 104 positive charges (where a charge has magnitude e). (a) What is the magnitude of the net electric field ...
*September 2, 2015*

**physics**

(2•0.411•9.8•5.22/0.344•8.46)
*August 29, 2015*

**physics**

At a carnival, you can try to ring a bell by striking a target with a 8.46-kg hammer. In response, a 0.411-kg metal piece is sent upward toward the bell, which is 5.22 m above. Suppose that 34.4 percent of the hammer's kinetic energy is used to do the work of sending the ...
*August 29, 2015*

**physics**

still not right where am I going wrong?
*August 28, 2015*

**physics**

(a) Work = (1/2)MV^2 at takeoff v = sqrt(2*2.4*10^-4/1.5*10^-4) = 0.00017888543 j
*August 28, 2015*

**physics**

58.0*9.8*3.70 =-2100 j 3 sig fig b) 2100 j 3 sig fig thanks Damon
*August 28, 2015*

**physics**

If a scuba diver descends too quickly into the sea, the internal pressure on each eardrum remains at atmospheric pressure while the external pressure increases due to the increased water depth. At sufficient depths, the difference between the external and internal pressures ...
*August 28, 2015*

**physics**

The human lungs can function satisfactorily up to a limit where the pressure difference between the outside and inside of the lungs is 1/21 of an atmosphere. If a diver uses a snorkel for breathing, how far below the water can she swim? Assume the diver is in salt water whose ...
*August 28, 2015*

**physics**

distance is 0.610m sorry
*August 28, 2015*

**physics**

The drawing shows an intravenous feeding. With the distance shown, nutrient solution (ñ = 1040 kg/m3) can just barely enter the blood in the vein. What is the gauge pressure of the venous blood? Express your answer in millimeters of mercury.
*August 28, 2015*

**physics**

thanks Damon
*August 28, 2015*

**physics**

An archer, about to shoot an arrow, is applying a force of +250 N to a drawn bow string. The bow behaves like an ideal spring whose spring constant is 510 N/m. What is the displacement of the bow string?
*August 28, 2015*

**physics**

50.2=F X(1.17/1.84) = ans/50.2 F= 78.9N
*August 28, 2015*

**physics**

You are trying to lose weight by working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.17 m in a time of 1.84 s. The readout on the display indicates that the average power you are ...
*August 28, 2015*

**Physics**

sqrt{2•0.411•9.8•5.22/0.262•8.46} = 4.37 m/s its still coming up wrong ?
*August 27, 2015*

**Physics**

Starting from rest, a 2.4x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, the ground exerts an average upward force of 0.42 N on it. This force does 1.5x10-4 J of work on the flea. (a) What is the flea's speed when it leaves the ground...
*August 27, 2015*

**physics**

this answer was wrong
*August 27, 2015*

**Physics **

A 58.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 3.70 m. What is the work done on the man by (a) the gravitational force and (b) the escalator?
*August 27, 2015*

**Math**

Kimi bought d donuts. There were 4 donuts in each box. Write an expression that shows how many boxes of donuts Kimi bought.
*August 7, 2015*

**Math**

A piece of rectangular cloth has an area of 40 square feet. Its length is 3 feet longer than its width. If the width of the rectangular cloth is represented as x, which of the following represents the length?
*July 20, 2015*

**Trigonometry **

The angles of elevation of an office building as observed from the top and ground level of a 10 meters tall residential building are 68° and 72° respectively. How tall is the office building? How far apart are the two buildings?
*July 18, 2015*

**Physics**

A uniform 7.9-m plank weighing 130 N lies on a platform with 3.5 m jutting off the platform. How far out on the plank from the edge of the platform can a 31-N dog walk without tipping the plank?
*July 9, 2015*

**chemistry**

Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical reaction that will inflate ...
*July 7, 2015*

**intro to psychology**

i think the only one wrong is c, am i correct
*June 24, 2015*

**Spanish**

Thank you Sra.
*May 23, 2015*

**Spanish**

The questions were recordings, this was the best I could gather from the recordings. The answers were multiple choice. 1. ¿Cantar en el coro el año pasado también? A. No, no sé tocar ningún instrumento. B. No. Yo era una de las solistas. C. S...
*May 23, 2015*

**help please**

19.B 20.C 21.B 22.C
*May 21, 2015*

**help please**

19. Identify the statement that is a verifiable fact. (1 point) Kids need to avoid excessive time in front of a computer. Laptop computers outsell desktop computers in retail sales. Most computer applications are designed for learning purposes. The elderly should avoid using ...
*May 21, 2015*

**help please**

16. B 18.D
*May 21, 2015*

**help please**

16. Which of the following is used when a political activist reminds others of the trials and tribulations facing the nation if change does not occur? (1 point) ethos pathos logos 18. Identify the sentence that relies most strongly on emotional language. (1 point) If this ...
*May 21, 2015*

**please help asap**

can u help and give me feedback please Literary Analysis of Song of Becoming. Song of Becoming by Fadwa Tuqan is talking about growing up. Becoming legends. It’s about what happens after growing up. It starts off with “…they are only boys who used to frolic and ...
*May 19, 2015*

**english**

can u please take a look
*May 19, 2015*

**english**

i need help checking this paper can you please give me feedback Literary Analysis of Song of Becoming. Song of Becoming by Fadwa Tuqan is talking about growing up. Becoming legends. It’s about what happens after growing up. It starts off with “…they are only ...
*May 19, 2015*

**english**

so its A
*May 19, 2015*

**english**

i think its B
*May 19, 2015*

**english**

10. Read the following paragraphs from "Saboteur." Mr. Chiu and his bride were having lunch in the square before Muju Train Station. On the table between them were two bottles of soda spewing out brown foam and two paper boxes of rice and sautéed cucumber and ...
*May 19, 2015*

**Math**

What is “a, b and c” in this hyperbola? (y-2)^2/5-(x-3)^2/6=1
*May 18, 2015*

**Spanish**

These were recordings that I had to interpret and decide whether they are Past, Present, or future. I'm not sure on the first one which form it is I was hoping you could help me decide which sounds better. Thank you. 1. Se (celebra/Celebré) La feria de Abril cara ...
*May 16, 2015*

**Math**

Finish the following to make a perfect square. 1.) x^2+sqrt3x+______ 2.) x^2+4x+_____
*May 15, 2015*

**Calc 2 **

I need help finding the limit of the following sequence or determining that the limit does not exists {csc^(-1) 11n}
*May 8, 2015*

**Geometric Series**

Evaluate the geometric Series or state that it diverges lower bound k= 1 upper bound = infinity E (sum symbol) E 5(-1/6)^(5k) I know it converges but im not sure to what
*May 7, 2015*

**Limit of Sequence **

I need help finding the limit of the following sequence or determining that the limit does not exists {csc^(-1) 11n}
*May 7, 2015*

**math**

a recipe calls for 2/3 cups of chocolate chips, how many batches can be made with 6 cups of chocolate chips?
*May 4, 2015*

**Chemistry**

The next question is, how may grams of CO2 will be produced as a result?
*April 30, 2015*

**Chemistry **

20.00mL of 0.55M CH3COOH solution is mixed with 9.95mL of 1.0M NaHCO3 solution. The reaction occurring is CH3COOH + NaHCO3 --> CH3CHOO + Na + H2O +CO2. Which is the limiting reagent in this reaction?
*April 30, 2015*

**Chemistry **

A standard of red dye was prepared in the following manner: 4.5mL of 0.100M of food dye was added to a test tube and 5.5mL of water was added. What was the final concentration of food dye in the test tube?
*April 29, 2015*