Saturday

February 13, 2016
Total # Posts: 131

**Trigonometry**

cot 7π/4 = -1 but how do i get to the other answers?
*January 31, 2016*

**Trigonometry **

Use a graph of the function to approximate the solution of the equation on the interval [−2π, 2π]. (List the solutions in increasing order from left to right on the x-axis. Round your answers to three decimal places.) cot x = −1
*January 31, 2016*

**Trigonometry **

Use a graph of the function to approximate the solution of the equation on the interval [−2π, 2π]. (List the solutions in increasing order from left to right on the x-axis. Round your answers to three decimal places.)
*January 31, 2016*

**Physics**

As part of a challenge lab, a student determines that a spring powered marble cannon will fire a 0.03kg marble to a maximum height of 0.8m when the cannon is set to the second medium firing position and fired vertically A. If setting the medium firing position requires that ...
*December 14, 2015*

**Physics**

The spring in a spring loaded cannon has a spring constant of 470N/m. A 0.05kg ball bearing is loaded into the cannon and the spring is compressed 0.1m. What will be the velocity of the ball bearing the instant before it hits the ground if the cannon s fired horizontally off ...
*December 14, 2015*

**Physics**

What is the minimum speed you would need to roll a lacrosse ball down a flat street for it to be able to roll over a speed bump with a height of 12 cm
*December 14, 2015*

**Physics**

_________________________________________________________________ You find yourself on your bike at the top of Twin Peaks in San Francisco. You are facing a 600m descent. You and your bike weigh a combined 85 kg. 1. How much gravitational potential energy do you have before ...
*December 14, 2015*

**Physics**

Just before your mountain bike ride, you eat a 240 Calorie exercise bar. (You can find the conversion between food Calories and Joules in the People’s Physics chapter and several references online.) The carbon bonds in the food are broken down in your stomach, releasing ...
*December 14, 2015*

**math**

A airplane crosses the Atlantic Ocean (3000 miles) with an airspeed of 600 miles per hour. The cost C (in dollars) per passenger is given by... C(x)= 150 + x/20 + 36,000/x Where x is the ground speed (airspeed plus or minus wind). a. What is the cost per passenger for ...
*October 9, 2015*

**Global finance **

What moves an exhange cross rate in forex?
*May 3, 2015*

**physics**

A fire hose ejects a stream of water at an angle of 33.4 ° above the horizontal. The water leaves the nozzle with a speed of 20.1 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?
*February 5, 2015*

**physics**

A golfer hits a shot to a green that is elevated 3.30 m above the point where the ball is struck. The ball leaves the club at a speed of 17.3 m/s at an angle of 49.0˚ above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
*February 4, 2015*

**Business **

3. Sam's Watch Shop sells 2,500 watches a year. The store estimates that it costs $4 per year to carry a watch in inventory and $100 to place an order for watches. (a) Determine the total inventory costs associated with an order size of 500 and (b) compute the economic ...
*December 8, 2014*

**supply chain**

Supply Chain Risk: Research information on the Internet to assess the risks of a global supply chain. How have companies in the Microsoft supply chain been aﬀected by disruptions to the supply chain due to events like strikes and natural disasters? Answer in no more ...
*November 19, 2014*

**business**

The Springer Company sells its product for $20 per unit. Its fixed costs are $10,000 and the variable cost per unit is $10 What is the new break-even point if the price per unit increases from $20 to $30
*October 4, 2014*

**business**

Find the break- even point if the selling price is $8 per unit, variable cost $3 per unit and fixed cost $3000.
*October 4, 2014*

**Algebra **

the outside of a picture frame has a length which is 4 cm more than width. The area enclosed by the outside of the picture frame is 165 square cm. Find the width of the outside of the picture frame.
*September 30, 2014*

**business**

Wellington’s Funds Flow Statement (Statement of Cash Flows) Sources Earnings after taxes $ 80 Depreciation 84 Decrease in accounts receivable 42 Increase in accounts payable 13 Increase in notes payable 196 Increase in accruals 22 Increase in long-term debt 7 . Total ...
*September 27, 2014*

**business**

1.After doing considerable shopping, Eric has just decided what brand and type of athletic shoes to buy and where he's going to buy them. In what stage of the consumer buying decision process is Eric? Problem recognition Information search Evaluation of alternatives ...
*September 17, 2014*

**business**

1. conduct store exit interviews identify a sample frame define the problem to be researched develop a questionnaire collect secondary data 2.validity significance truthfulness corroboration reliability 3.descriptive secondary exploratory mixed primary 4.random stratified ...
*September 13, 2014*

**business**

1.jack leblanc, an mba student at the niversity of wisconsin at madison, recently purchased a small ice cream and frozen yogurt business close to campus to help pay his way through the program. even though wisconsin has cold winters, ice cream and frozen yogurt generally sell ...
*September 13, 2014*

**chemistry**

NH4Cl is the answer
*May 1, 2014*

**chemistry**

Correct You can estimate the slopes qualitatively by looking to see which line is the steepest. You could also calculate values by finding Δy/Δx. If you do this, you should have calculated values approximately equal to the following: Salt Slope Li2SO4 −0.07 ...
*May 1, 2014*

**Geometry**

Hello I'm in Geometry, in Connections Academy. I would love to help, but I don't have that specific quiz for some reason... What are the questions???
*May 1, 2014*

**Physics**

Use equations: KE=.5*m*v^2 and v=d/t KE=.5*m*(d/t) KE=.5*58.5*(540/(17.2*60)) KE=15.3 J
*March 15, 2014*

**science(check answers)**

Thanks!!! Another 100%!
*March 12, 2014*

**Help!!!**

Thanks so much! Got 100%!
*February 3, 2014*

**science help plzzz**

Haylee's answers should be correct, Lingua 1. a is not the atmosphere, it is the geosphere.
*January 22, 2014*

**science help plzzz**

100%! Thanks!
*January 17, 2014*

**Science**

I got 8/10, #5 is C and #9 is C as well. You missed #8, it is D. Please update so other people don't get it wrong!
*November 6, 2013*

**science**

c) Geosphere
*November 5, 2013*

**CALCULUS. Check my answers, please! :)**

Hey Samantha, were his answers right or were yours?
*October 5, 2013*

**Chemistry**

4.5
*September 21, 2013*

**Statistics**

How do you know what the z-value is? I've never used a z-table.
*May 5, 2013*

**Bus Math**

i need to earn 61000 over 5 years. at 6% interest semiannually what is my first deposit?
*March 27, 2013*

**Chemistry**

I did step by step but answer doesn't match any of the choices it gives me
*March 20, 2013*

**Chemistry**

Repost .. Saccharin is a weak organic base with a Kb of 4.8X10^-3. A 0.672-g sample of saccharin dissolved in 30.0mL of water had a pH of 12.34. What is the molar mass of saccharin?
*March 20, 2013*

**Chemistry **

Consider the reaction CO3^-2+H2O<==>HCO3^+OH^-. Kb for CO3^-2 is 2.1x10^-4 at 25 Celsius . What is Ka for the HCO3^- ion at 25 Celsius?
*March 20, 2013*

**Chem**

Consider the reaction CO3^-2+H2O<==>HCO3^+OH^-. Kb for CO3^-2 is 2.1x10^-4 at 25 Celsius . What is Ka for the HCO3^- ion at 25 Celsius?
*March 20, 2013*

**Chem**

Saccharin is a weak organic base with a Kb of 4.8X10^-3. A 0.672-g sample of saccharin dissolved in 30.0mL of water had a pH of 12.34. What is the molar mass of saccharin?
*March 20, 2013*

**Chemistry **

Repost:: sorry couldn't understand it What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5
*March 20, 2013*

**Chemistry **

A solution of aniline(C6H5NH2, Kb=4.2x10^-10) has a pH of 8.69 at 25 Celsius. What was the initial concentration of aniline? I have so far don't know if it's right: *. [H3O]=10^-8.69=2x10^-9 * 4.2x10^-10=(2x10^-9)^2 / x X=1.2x10^-8 (correct???)
*March 20, 2013*

**Chemistry**

Ok now I'm more lost and confuse with both ways if solving this problem...HELP!
*March 19, 2013*

**Chemistry**

What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5
*March 19, 2013*

**Chemistry **

A 8.5 x 10^-3 M solution of acetic acid is 4.6% ionized at 25 degree Celsius. in a 8.5 X 10^-4 M solution, the percentage of ionization would be? A.the same B.>4.6% C.<4.6% D.zero E.100%
*March 18, 2013*

**math**

A survey by Men’s Health magazine stated that 40% of men said they used alcohol to reduce stress. At 0.10, test the claim that a random sample of 100 men was selected and 30 said that they used alcohol to reduce stress. Use the P-value method.
*January 17, 2013*

**phyiscs**

i feel like slapping myself across the face... i completely forgot about gravity...
*January 15, 2013*

**phyiscs**

What is the spring constant of a spring that stretches 2.00 cm when a mass of 0.600 kg is suspended from it? Answer i know the answer is 295 n/m but im nto sure how they got to it,
*January 15, 2013*

**physics**

just draw out a picture and you will see the obvious answer
*January 15, 2013*

**social studies**

write three questions to ask farmers about new machinery and farming techniques that helped them from the great plains
*December 10, 2012*

**Chemistry**

46.70 amu
*December 8, 2012*

**5th grade math**

E 12.65 15%/100=x/11 cross multiply to get 165=100x and divide both side by 100 to get x=1.65 that is the tip add the tip to his total off 11 dollars; 11+1.65 to get 12.65
*December 4, 2012*

**algebra**

looks like ur trying to pass off ur homework on us...
*December 4, 2012*

**precalculus**

how do i change this into a standard ellipse equation 2x^2 + y^2= 3 , like i know i divide both side by 16 and get (2/3)x^2 +y^2 / 3= 1 but i dont know what to do with that 2/3 in front of the x
*December 4, 2012*

**trigonmetry**

find all solutions for tan^2 theta -4 = 0 i got theta = arctan 2 is that correct? and if it is how would i write it as a solution?
*December 4, 2012*

**trigonometry**

how do i simplify (secx - cosx) / sinx? i tried splitting the numerator up so that i had (secx / sinx) - (cosx / sinx) and then i changed sec x to 1/ cosx so that i had ((1/cosx)/ sinx) - (cos x / sinx) after that i get stuck
*December 4, 2012*

**trigonometry**

im well aware of that steve thank you for answering but i really wanted to know was is it at all possible to use factoring to solve this like i have up there
*December 3, 2012*

**trigonometry**

can i use factoring to simplify this trig identity? the problem is sinx + cotx * cosx i know the answer is cscx and i know how to get it but i want to know if i can do factoring to get it bc i tried to but it wont give me the answer . this is the step i went through: 1) sinx...
*December 3, 2012*

**Math**

How much money should be deposited today in an account that earns 6.5% compounded monthly so that it will accumlate to $8,000.00 in three years?
*November 25, 2012*

**CHM formula needed, pls?**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.
*November 19, 2012*

**CHM**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol. Need the formula to understand how to continue with more problems.
*November 19, 2012*

**Chemistry..**

How many milliliters of a 0.25 M sucrose solution contain 2.0 grams? The molar mass of sucrose (C12H22O11 ) is 342.3 g/mol.
*November 18, 2012*

**college algebra, Please help!!**

the graph was shifted up 3 from the original graph that's all the question wants to know
*November 14, 2012*

**Pre-Calculus**

i can narrow it down for you its either b or d
*November 14, 2012*

**arithmetic**

- 9 + 2 = 2 + (-9) -7= -7
*November 14, 2012*

**trigonometry**

actually could i take the arctan of -5/4? would that give me the degree?
*November 13, 2012*

**trigonometry**

Suppose (x, y) =(4, -5) and θ is an angle in standard position with (x, y) on its terminal side. What is the degree measure of angle θ? im not sure how to do this one problem plz show step by step
*November 13, 2012*

**Trigonometry**

(+ or -) i times sqrt of 5 / (+ or -) i times sqrt 7
*November 13, 2012*

**statistics**

An automatic machine that fills bags of unpopped popcorn is operating properly if the weights are independently and normally distributed with a mean of 114 grams and a standard deviation of 4.9 grams. Find the probability that if 7 bags are randomly selected, their mean weight...
*November 7, 2012*

**statistics**

An automatic machine that fills bags of unpopped popcorn is operating properly if the weights are independently and normally distributed with a mean of 114 grams and a standard deviation of 4.9 grams. Find the probability that if 7 bags are randomly selected, their mean weight...
*November 7, 2012*

**Business Finance**

Need step by step explaination for soulution: A firm has net income of #2,610 and tax rate of 33%. The revenue is $20,400, cost are 78 percent of sales, and interest expene is $100. what is th edepreciation expense for the years?
*September 27, 2012*

**Algebra**

the outside of a picture frame has a length which is 4 cm more than width. The area enclosed by the outside of the picture frame is 165 square cm. Find the width of the outside of the picture frame.
*September 24, 2012*

**physics**

A motor car moving at a speed of 72 km/h can not come to a stop in less than 3 s while for a truck this time interval is 5.0s . On a highway the car is behind the truck both moving at 72 km/h . The truck gives a signal that it is going to stop at emergency. At what distance ...
*September 18, 2012*

**Financial Management**

Consider the following cash flows (CF's) (i) A single CF at t=5 of $15,000 (ii) A single CF at t=11 of of $10,000 and (111) A single cash flow CF at t=18 of $15,000 Calculate the present value of these CF's at time t=0 interest is 4 percent compounded each period.
*September 2, 2012*

**math**

Draw a big diagram You end up with a triangle with: the horizontal side = 47 ft the side representing the leaning pole ... call it a and the angle opposite the pole side = 51° The pole makes an angle of 7° with the vertical ... so the angle between to pole side and the...
*April 23, 2012*

**AP CHEMISTRY**

A,E INCREASES B,C,D DECREASES
*March 19, 2012*

**Chemistry**

DrBob222 you are very unclear.... why did you do all that?
*February 9, 2012*

**Business And Finance Mathematics**

Total current assests(CA)$20,000 Accounts receivable(AR) $10,000 Current Liabilities(CL) $11,000 Inventory(INV) $4,000 Net sales $30,000 Total assests $25,000 Net income $5,000 1. Calculate current ratio. A. 1.82 B. 1.80 C. 1.28 D .182 2.Calculate acid test. A. 1.52 B. 1.45 C...
*January 21, 2012*

**math**

Sean began painting his house on Monday. He worked 5 hrs longer painting on Tuesday than he had on Monday. On Wed he worked 4 hrs. less than on Tuesday. On Thurs he painted 6 hrs longer than on Wed. He painted for 11 hrs on Thursday. How long did he paint on Monday?
*January 18, 2012*

**algebra**

(x) =29.95 + 200 @ x = 300 where c (x) is the cost of making x pairs of shoes
*January 17, 2012*

**math**

vbcvbv
*December 11, 2011*

**english**

hello! I made short and simple. On Thursday, Ocuupy Wall Street celebrated its two month anniversary. They are students, unemployed, salaried, immigrants or artists. They doen't have leaders. They are stick of the powerful banks that take up again with the profits whereas ...
*November 20, 2011*

**english**

Thanks Writeacher and I'll let you what I will say, I promise
*November 20, 2011*

**english**

Hello! I am a senior student who lives in Paris, therefore English is my seocnd language. I need help to my examen oral. Tomorrow, I have to talk about: "Occupy Wall Street" movement (what's happening? analyzing the situation, is the movement important? can the ...
*November 20, 2011*

**english**

thanls Mrs Aka
*November 6, 2011*

**english**

Hello! I'm a French student,I'm 17, I've learned the beginning of Freedom by Jonathan Franzen. Sometimes, it seems confused as it's my second language. So I need help, please. Can you explain what happened with Patty, Eliza, Carter, Richard and Walter in the ...
*November 6, 2011*

**english**

Im writing a argument essay about PETA and I cant seem to come up with a thesis…..I need help plz.
*October 26, 2011*

**math**

???
*May 23, 2011*

**algebra**

7x + 3y = 42 graph this equation using the intercepts method graph this equation using the intercepts method
*May 5, 2011*

**Algebra**

In 1993, the life expectancy of males in certain countires was 62.3. In 1999, it was 66.1 years. Let E repesent the life expectancy in year t and let t represent the number of years since 1993. The linear funtion that fits the data E(t) =
*March 20, 2011*

**english**

Very is the adverb. How fearful? VERY fearful
*February 15, 2011*

**algebra**

noone knows the answers ?
*February 12, 2011*

**physics**

the answers are supposed to be in m/s^2
*October 13, 2010*

**physics**

A space shuttle is launched from rest. It takes 8.00s to reach 165km/h , and at the end of the first 1.00 min its speed is 1650km/h . a) what is the avg. acceleration in (m/s2) during the first 8.00 seconds? b) what is the avg. acceleration in (m/s2) between the 8.00 seconds ...
*October 13, 2010*

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?
*October 7, 2010*

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?
*October 7, 2010*

**Physics**

The boy on the tower of height h = 20 m in the figure below throws a ball a horizontal distance of x = 56 m. At what speed, in m/s, is the ball thrown?
*October 7, 2010*

**french**

complete the following sentences withthe appropriate articles. le,la,l;,les est-ce que tuas------disques? -----etudiante parle avec le professeur
*October 6, 2010*

**physics**

where did u get 105,000 m/h from?
*September 8, 2010*