Monday

October 20, 2014

October 20, 2014

Total # Posts: 440

**math**

Please help!
*October 16, 2014*

**math**

A woman owns stock in two companies, company A and company B. She owns 79 shares of stock in company A. Each share of stock in company A is worth $12. Each share of stock in company B is worth $19. Write three equations to represent the total number of shares of stock the ...
*October 16, 2014*

**Math**

This would equal 2 1/2 or 2.50
*October 16, 2014*

**Maths**

Thank you very much!!! then how to do this qn? y is directly proportional to the square root of x.If y is quadrupled,find the percentage change in x.
*October 16, 2014*

**Maths**

If it takes 6 men 4h to dig a hole 6m deep,how long will it take 10 men to dig a hole 5m deep?
*October 16, 2014*

**Math**

A basketball team won 70% of the 30 games they played. How many games did they win?
*October 15, 2014*

**Biochemistry**

Which solutions, animal or plant, were more suitable to resisting pH change? Why do you think this is the case? Explain.
*October 8, 2014*

**Biochemistry**

Which solutions, animal or plant, were more suitable to resisting pH change? Why do you think this is the case? Explain.
*October 8, 2014*

**Biochemistry**

All biological enzymes function best at particular pH values. In the normal human stomach, the pH of 2.0-3.0 provides the environment required for the proper functioning of the digestive enzymes found there. 1. How would adding a basic medicine effect the pH of the stomach? 2....
*October 8, 2014*

**Biochemistry**

You are told that the solutions in two beakers are both 0.02 M solutions of acids "A" is weak acid and acid "B" is a strong acid. Which of the two acids would have the lower pH, acid "A" or acid "B"? Explain your answer.
*October 8, 2014*

**Pre-Calc/Trig...**

Its a transformation because the slope is the same, the y-intercept is just shifted up 7 instead of being at zero. Try and draw the graphs to visualize this.
*October 7, 2014*

**Physics: momentum**

While you are standing on a expanse of smooth ice, your friend throws a heavy ball towards you. How can you maximize your speed after your interaction with the ball? a. More information is needed to determine how you should maximize your speed. b. It doesn't matter since ...
*October 7, 2014*

**physics**

Try and draw a free body diagram to help you understand this. The 35 m/s velocity is along the hypotenuse of a right triangle, and the components you want are in the x and y direction. To find the y component, you would use sinA=y/35, and for the x component, you would use ...
*October 7, 2014*

**Chemistry**

Yes that is what I arrived at as well.
*October 7, 2014*

**Chemistry**

To calculate the weighted atomic mass, you would use the percentages of the isotopes. Since the isotope is 55, its weight is 55. Since they are present in different amounts, you cannot just take the average, you have to do a weighted average using the percentages given. So, ...
*October 7, 2014*

**Physics**

That did not give me the correct answer.
*October 5, 2014*

**Physics**

A block of mass m = 4.30 kg slides along a horizontal table with speed v0 = 8.50 m/s. At x = 0 it hits a spring with spring constant k = 31.00 N/m and it also begins to experience a friction force. The coefficient of friction is given by μ = 0.150. How far has the spring ...
*October 5, 2014*

**Math**

Suppose an urn contains 10 balls numbered from 1 to 10. Someone draws 3 balls simultaneously from the urn (i.e. without replacement.) What is the probability that the lowest number drawn is 2? (8C3)/(10C3) but I know that is wrong. I also tried ((8C3)+(7C3)+(6C3))/(10C3)
*October 1, 2014*

**Statistics**

Suppose an urn contains 10 balls numbered from 1 to 10. Someone draws 3 balls simultaneously from the urn (i.e. without replacement.) What is the probability that the lowest number drawn is 2? (8C3)/(10C3) but I know that is wrong. I also tried ((8C3)+(7C3)+(6C3))/(10C3)
*September 30, 2014*

**6TH GRADE**

Thank you Ms. sue!
*September 24, 2014*

**6TH GRADE**

Describe a real-world situation that is modeled by multiplying two fractions or mixed numbers. Can someone give me an example?
*September 24, 2014*

**engineering science**

An object weighing 60N rest on a slope forming an angle of 17.5 degrees with the horizontal. A force of 44N parallel to the sloping surface just moves the object upwards. Calculate the frictional force.
*September 10, 2014*

**statistics**

A statistical analysis firm is hired to analyze the failure rate of a manufactured product. Which margin of error below would best indicate that the data used by the firm is a valid representation of the population? I don't understand the question they're asking me. ...
*September 7, 2014*

**science**

Need help with a summary of sexual an asexual reproduction
*September 4, 2014*

**Math**

so what is the answer
*August 24, 2014*

**Math**

You want to create an open rectangular box from a rectangular box. from a square piece of cardboard 20 inches by 20 inches. You will cut a 3 inch square from each corner. Draw a diagram and find the length of the box. Can someone help me with this diagram thing. I can't ...
*August 24, 2014*

**Math**

yes I got it right. Thankyou Ms.Sue (:
*August 24, 2014*

**Math**

A piece of fabric is 52 inches long. You cut the fabric into two pieces. The first piece is x inches long. The second is 14 inches longer than the first. Draw a diagram & solve for x.
*August 24, 2014*

**Math**

You want to create an open rectangular box from a rectangular piece of cardboard. The cardboard has length 14 in and you want to cut 2 in squares from each corner. Draw a diagram. What is the length of the box?
*August 24, 2014*

**Math**

the perimeter of a rectangular park is 1080 yds. The width of the park is 240 yds. What is the length of the park? What is the amount of grass that the township has to mow & fertilize?
*August 24, 2014*

**MATH HELP**

can you explain why?
*August 22, 2014*

**MATH HELP**

can you can why? detailed please
*August 22, 2014*

**MATH HELP **

shelley spent 17 min washing the dishes. she spent 38 min cleaning her room. explain how you can use mental math to find how long shelley spent on the two tasks?
*August 22, 2014*

**Science**

how to reduce the resistive force while freewheeling?
*July 24, 2014*

**math**

If the tax on an item is $16 and jerry wanted to buy two how much would the two items cost without the tax? Hint: Tax is 20% of the cost of the item.
*July 12, 2014*

**maths**

okay i got it!thanks!!
*July 12, 2014*

**maths**

why3x+3=0 ??
*July 12, 2014*

**maths**

Given(3x+3)/(6y+1)=3,find the value of7x/3y.
*July 12, 2014*

**Chemistry**

In aqueous solution, hydrochloric acid, HCl, and sodium carbonate, Na2CO3 react to produce gaseous carbon dioxide, CO2, water, H2O and sodium chloride, NaCl. A 10.0 g impure sample of Na2CO3 is dissolved completely in water; then treated with 3.00 mol L−1 HCl to evolve ...
*June 15, 2014*

**English 8**

Infinitive phrase and how it is used My gram taught me to make lentil soup To make lentil soup infinitive I'm not sure if it is a noun or adv.
*May 20, 2014*

**English8**

Find infinitive phrase and tell if itis used as a noun adj or adv To have a balanced diet keep the food triangle in mind. To have a balanced diet is phrase. Is it an adverb
*May 20, 2014*

**math**

Andre picks a card at random. Without putting the first card back, he picks a second card at random. What is the probability that both cards will be hearts. The cards showing are three hearts and two diamonds
*May 8, 2014*

**math**

i dont understand what they are asking me to do when they give me a quhat looks like this (write acute,right,or obtuse for each angle 1.AFD 2.BFD and thers a bunch of line that intersect off to the side
*February 23, 2014*

**Physics**

A 30m high cylindrical water tank has a diameter of 14m. The tank is two-thirds full of water. What is the pressure at the bottom of the tank?
*February 19, 2014*

**math**

John had $24.He spent 2/3 of his money.How much he has left.
*January 30, 2014*

**Chemistry**

A solution is prepared by mixing 45.00 mL of 0.022 M AgNO3 with 13.00 mL of 0.0014 M Na2CO3. Assume volumes are additive. Calculate [Ag+], [CO32-], [Na+] and [NO3-] after equilibrium is established.
*November 15, 2013*

**Chemisty**

Consider a 1.50 L aqueous solution of 3.75 M NH3, where 17.5 g of NH4Cl are dissolved. To this solution, 5.00 g of MgCl2 are added. a. What is [OH-] before MgCl2 is added? b. Will a precipitate form? c. What is [Mg2+] after equilibrium is established? I don't need the ...
*November 14, 2013*

**physics**

The position of a particle moving along the x axis is given by x=3.0t^2 - 1.0t^3 , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction
*November 14, 2013*

**Chemistry**

Thanks so much! I never would've figured that out.
*November 12, 2013*

**Chemistry**

A saturated solution of calcium chromate (CaCrO4) freezes at -0.10 C. What is Ksp for CaCrO4? Assume complete dissociation. The density of the solution is 1.0 g/mL.
*November 12, 2013*

**Chemistry**

When excess NaOH is added to Zn(OH)2, the complex ion Zn(OH)4 2- is formed. Determine the molar solubility of Zn(OH)2 in .10 M NaOH. Compare with the molar solubility of Zn(OH)2 in pure water. I thought I knew how to do this problem, but I'm not getting the right answer. ...
*November 10, 2013*

**Chemistry**

*To be entirely correct, you'll want to use the values for hydrogen and oxygen gas. I'll let you figure those out, along with the molar ratios for hydrogen gas and water and oxygen and water.
*November 9, 2013*

**Chemistry**

Using the molar masses of hydrogen and oxygen, you can discover your limiting reactant (the reactant that would produce the least water). The water produced by your limiting reactant would be the amount of water formed. (2.4 g H)(1 mol H/1.008 g)(1 mol H20/2 mol H)=1.19 mol ...
*November 9, 2013*

**Chemistry**

Use standards entropies and heats of formation to calculate delta Gf at 25C for a. cadmium (II) chloride (s) b. methyl alcohol, CH3OH (l) c. copper (I) sulfide (s) I really have no idea where to start with this problem. I have no idea how to calculate delta Gf, and everything ...
*November 9, 2013*

**Physics**

A daredevil decides to jump across a 15 m wide canyon on his motorcycle. The opposite side of the canyon is 3 m lower than the side the daredevil starts on. The daredevil drives his motorcycle off the cliff at a speed of 27 m/s. How long does it take the daredevil to cross the...
*October 17, 2013*

**Math**

j+4/6=8/12
*October 9, 2013*

**American History**

Why did the 21 amendment repeal the 18 amendment?
*October 8, 2013*

**calculus**

Find the derivative of the function. G(y) = (y − 1)3/ (y2 + 2y)7
*October 3, 2013*

**probability**

if you have a spinner with 3 parts. 1 white 2 blue. and you spin the spinner 90 times how many times do you expect the spinner to land on blue
*September 27, 2013*

**math**

Recently a census was taken on space station Gamma. Of the 100 residents interviewed, 75 traced their ancestry to the planet Omicron, 85 traced their ancestry to the planet Omega and 60 residents traced their ancestry to both planets. How many residents had ancestors from ONLY...
*September 3, 2013*

**geography**

We need help with finding Canada's fourteen capitals can u help us please
*August 18, 2013*

**Basic Physics**

2.5 h = 9000s 10m/s x 9000s = 90000m
*June 26, 2013*

**Government**

United States
*June 25, 2013*

**Government**

The President can choose to get rid of democracy. True or False?
*June 25, 2013*

**Math**

What is the integral of dx/(x^3-9x)? Please post steps too please!
*June 4, 2013*

**math**

Yes. Thank you.
*May 25, 2013*

**math**

If = sin-10.398, then =_____o_____' _____". Round to the nearest second.
*May 25, 2013*

**giving up**

i'm depressed that no-one has answered my science question so i'm giving up and i don't care if i fail my science because it will be all googles fault the only thing i know about the xenon 135 is that it's a tennis/squash racket and i needed the element xenon ...
*May 21, 2013*

**none**

read my question above
*May 21, 2013*

**Science**

Identify and describe the type of radiation emitted during the radioactive decay of the radioisotope xenon 135
*May 21, 2013*

**math**

a jar contains two red and five yellow marbles. A marble is drawn at random and then replaced. A second draw is made at random. find the probability that both marbles are red?
*May 15, 2013*

**chemistry**

magnesium in flashbulbs burn according to the equation 2Mg + O2 ---> 2MgO what mass of Mg combines with 5.80 L of O2 measured at STP?
*May 2, 2013*

**english**

St. Patricks day is on March 17, every day. i am glad to answer this question for you.
*April 23, 2013*

**Physics**

i am not sure
*April 23, 2013*

**geometry**

The ratio of two similar prisms is 2:5 the volume of the larger is 375cm3 if sand is being poured into the smaller prism at 3cm3 per second how many seconds will it tAke to fill the smaller prism?
*April 7, 2013*

**Math**

10 cups
*March 25, 2013*

**Math**

Suzanne has a liter of apple juice. How many cups with a capacity of 100 mL can she fill with apple juice?
*March 25, 2013*

**math**

A basketball has a diameter of 29.5 inches. If the basketball is fully inflated, about how many cubic inches of air will it hold?
*March 25, 2013*

**English**

Which senses are appealed to in these lines from Macbeth? Nay, had I pow'r, I should / Pour the sweet milk of concord into hell, / Uproar the universal peace… A. smell, taste, and touch B. hearing, sight, and smell C. sight, taste, and hearing D. hearing, taste, and ...
*March 20, 2013*

**Math**

find the average rate of change from 1 to x Find the average rate of change from 1 to 3 Using f(x) = -2x^2+6x
*March 11, 2013*

**Math**

find the average rate of change from 1 to x Find the average rate of change from 1 to 3 Using f(x) = -2x^2+6x
*March 11, 2013*

**Mathematics. Geometric sequences.**

2+4+8+...is a geometric sequence. Prove the sum of the first n terms is two less than the (n+1)the term.
*March 10, 2013*

**Government**

When has the constitution protected 2 fundamental principles? When has it failed to protect 2 fundamental principles?
*March 3, 2013*

**Chemistry**

How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr? And would i just convert 697 torr into atm and use that for pressure? And how do i find the molar mass of the ...
*February 18, 2013*

**Chemistry**

It takes 200. seconds for a sample of carbon dioxide to effuse through a porous plug and 280. seconds for the same volume of an unknown gas to effuse under the same conditions. What is the molar mass of the unknown gas? Enter your answer to 3 significant figures.
*February 18, 2013*

**Chemistry**

So would i just convert 697 torr into atm and use that for pressure? or what do i do with the 25C/760?
*February 18, 2013*

**Chemistry**

How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
*February 18, 2013*

**Math**

Write an equation you could use to solve each problem. Solve each equation by systematic trial. Josie had only nickels in her purse. The value of the coins was 80 cents. How many nickels were in Josie's purse?
*February 7, 2013*

**Physics**

A total of 100000 kg of water per second flows over a waterfall 30 m high. If half of the power this flow represents could be converted into electricity, how many 100 watt lightbulbs could be supplied?
*February 2, 2013*

**Social Studies**

what 5th grade social studies word starts with Y,Z,and N?
*December 18, 2012*

**math**

I family of ducks contains 7 ducks which are 44 lbs. The other wieghs 32 lbs (no amount of ducks given) How much does each duck and duckling weigh in each group THEY HAVE TO WEIGH THE SAmE IN EACH GROUP
*December 16, 2012*

**Problem Solving: Writing to Explain**

how do you order least to greatest for fraction 3/12 1/6 and 1/3
*December 4, 2012*

**math**

Andy and Sam are saving money to go on their senior trip. The amount of money that Andy will have at the end of each week, w, can be expressed at A(w) = 20w + 300. The amount of money that Sam will have at the end of each week, w, can be expressed at S(w) = 15w + 400. They ...
*December 3, 2012*

**math**

What is 43 over 15
*November 28, 2012*

**Science**

Can you explain tectonic plates?
*November 27, 2012*

**Physics**

Ocean waves pass through two small openings in a breakwater. This time the openings are d = 21 m apart. You're in a small boat on a perpendicular line midway between the two openings, L = 80 m from the breakwater. You row x = 32 m parallel to the breakwater and find ...
*November 27, 2012*

**PLEASE HELP!! DESPERATE!!! (MATH)**

The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a (a) local maximum, (b) local minimum, or (c) point of inflection
*November 25, 2012*

**Math**

The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a (a) local maximum, (b) local minimum, or (c) point of inflection
*November 25, 2012*

**Math**

For y= (3x)/(2e^x+e^-1), use graphing techniques to find the approximate intervals on which the function is: a) increasing b) decreasing c) concave up, d) concave down then find any e) local extrema f) inflection points
*November 25, 2012*

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