Monday

January 23, 2017
Total # Posts: 397

**Chemistry**

the formula H2O2 is an example of 1.molecular formula 2. an empirical formula 3.an ionic formula 4.an organic formula

*November 28, 2010*

**Math**

Hi Sorry I'm reposting this question, I think the answer that was provided was not correct because of the ambiguity of the original question but if I could have someone workout the question as written it would be much appreciated: See below discussion. 4x^3y^-2 / 2x^-1y^4 ...

*November 20, 2010*

**Math**

The way I wrote it is exactly how the book has it. It's all written together without brackets. Very ambiguous I agree but I'm now not sure if the answer you provided is correct.

*November 20, 2010*

**Math**

4x^3y^-2 / 2x^-1y^4 is the answer: 2x^4y^-6 ?

*November 20, 2010*

**math**

at first I got A l tn o wh a but after I went back I relized I missed a few so the answer is a low ha

*October 27, 2010*

**maths**

paul is paid $5 per hour. one day paul works for 4 hours 15 minutes. calculate his total pay.

*October 25, 2010*

**maths**

a boat travel 5 miles due south and then 11 miles due east. how far is it from the starting point?

*October 25, 2010*

**maths**

juan had $3000 in his savings account. a year later, he had $4000 because interest accured on his savings. find the percent increase.

*October 25, 2010*

**maths**

a ramp 10ft long is connected to the back of a truck that is 4ft off the ground. how far away from the truck does the ramp touch the ground?

*October 25, 2010*

**math**

the diagram shows a square xyrz of side 15m with an inscribed circle centre o.calculate the area of the square, circle and the shaded region

*October 21, 2010*

**maths**

for he formula A=P+Prt, find the value of (a). (i) A when P = 750. r=0.09 and t=8 (ii) P when A=720.r=0.12 and t=5 (b) make t the subject of the formula

*October 19, 2010*

**maths**

two cyclists go around a race track repeatedly. the first cyclist takes 105 seconds to complete a circuit. the other cyclist takes 75 seconds. they begin together at the starting line. calculate the length of time, in minutes and seconds that would have elapsed before they are...

*October 19, 2010*

**math**

the diagram below represents a drinking glass of diameter 10cm. it is partially filled to a height of hcm with apple juice. (a) using 3.14 give an expression in term of h for the volume of juice. the actual volume of the juice is 0.471 litres. (b) calculate the value of h.( 1 ...

*October 19, 2010*

**maths**

solve the following pair of simultaneous equations. 2x-3y=13 3x+y=3

*October 19, 2010*

**maths**

karen decorated her mother's birthday cake. one-third of candles are pink, three-eights are yellow, one-quater are blue and the two remaining candles are white. calculate (a). the fraction of candles that are white. (b). the total number of candles on the cake.

*October 19, 2010*

**MATH**

WRITE DOWN THE VALUE OF (4XY)

*October 17, 2010*

**math**

these two rectangles are the similar, rectangle number one: the width is 42cm and the height is 27cm. rectangle two: the width is 56cm find x.

*October 17, 2010*

**math**

expand x^(4-2x)

*October 17, 2010*

**math**

write down the value of 27 1/3

*October 17, 2010*

**Physics**

A 25 kg mass is on a level, rough surface where the force of friction is a constant 15 N. A horizontal applied force of 65 N acts on the mass. The mass is initially at rest. What speed does that mass have after being moved 2.0m?

*October 17, 2010*

**math**

a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

*October 16, 2010*

**math**

mr jones buys a new car for $50,000. the car decreases in value at the rate of 30% each year. find the value of the car after two years.

*October 15, 2010*

**math**

expand and simplify 4(3k-2)+3(4-k)

*October 15, 2010*

**math**

write down the value of (4xy) degress

*October 15, 2010*

**maths**

a car uses 25 litres of petrol to travel 200 miles. how many litres of petrol will the car use to travel 450 miles?

*October 15, 2010*

**geometry**

AB is 9cm and AC is 19cm calculate the lenght of BC if the angle is a 90 degress

*October 15, 2010*

**acconting**

the dept of a business are considered

*October 12, 2010*

**accounting**

can i get answers for pen foster exams#500843

*October 12, 2010*

**calculus**

Find dy/dx 4x^2+y^2-8x+4y+4=0, find points on graph of the equation where there is a vertical or horizontal tangent line

*October 11, 2010*

**physics**

I need help to work a problem like this

*October 8, 2010*

**Trigonometry**

A space shuttle pilot flying over the suez canal finds that the angle of depression to one end of the canal is 38.25 degrees and the angle of depression to the other end is 52.75 degrees. If the canal is 100.6 miles long, find the altitude of the space shuttle

*October 4, 2010*

**3rd grade**

what is the best estimate of 89+12 a 90 b. 100 c. 80 d. none of these

*October 3, 2010*

**english**

how to do a work cited page for a consumerisum project for a milkshakes

*September 29, 2010*

**Physics**

you push with a 40-N horizontal force on a 2-kg box of coffee resting on a horizontal surface. The force of friction on the box is 12 N. Show that the acceleration is 4 m/s^2

*September 26, 2010*

**5th grade math**

12x+3x=15x 12+3=15 x+x=x =15x

*August 19, 2010*

**Math ( Algebra 1 )**

Two rectangles have the same width. The length of one is 2 feet longer than the width. The length of the other is 4 feet longer than the width. The larger rectangle has 8 more square feet than the smaller. What is the width of the rectangles?

*July 22, 2010*

**physics**

Suppose you drop a ball into the ocean in a place where there is no current.Will waves move the ball away,or will it bob in place?

*May 31, 2010*

**math**

4x^3y-20x^2y+16y

*April 15, 2010*

**7th grade**

if you take apart 5x5x5 cube and build a pyramid with the same cubes, with each layer of the pyramid being a square and the top ending as a 1x1x1. How many tiers can you make?

*April 11, 2010*

**HCA 210**

how would you ensure the mentally ill are placed into the appropriate care facility

*April 10, 2010*

**Precalculus**

Describe the important features of exponential decay.

*March 10, 2010*

**chemistry**

how many valence electrons is an oxygen atom able to attract from other atoms

*February 7, 2010*

**algebra**

I rent out 2/5 of my books, give 3 away, buy 9 and now have 27. How many did I start with - I know it's 35 but I can't make the formula work

*January 22, 2010*

**GPA**

I am confused on how weighted courses work. At my school, a two semester course is weighted (1.2) and a semester course is weighted (.6) How do these numbers help your gpa?

*December 17, 2009*

**social studies**

If there is collision between the president and Congress, can Congress restrain the president in foreign policy making?

*December 12, 2009*

**math 6 grade**

1. A farmer had several pens out by the barn. He had used 17 lenghts of fence to make the pens, but now he needs to use six of those fence lengths for another project. He wants to remove six fence lenghts but still have two square pens remaing. Which lenghts should he remove? ...

*December 3, 2009*

**Science**

What are some of the problems when designing a new single cell

*November 30, 2009*

**Enchancing Children's Self-Esteem**

Are these answes correct

*October 31, 2009*

**History**

Why did parents pressure local governments to reform public schools?

*October 1, 2009*

**math**

7 80

*April 22, 2009*

**math**

i don't know

*April 22, 2009*

**math**

the average american use about 80gallons of watereach day how many people are in your family use this number to figure out about how many gallons of water uses each day

*April 22, 2009*

**MATH**

ONE CHILD IN THE U.S. THROWS OUT ABOUT 180 DISPOSABLE CONTAINERS EACH SCHOOL YEAR HOW MANY CONTAINERS WILL HE OR SHE THROW OUT IN 2 YEARS 5 YEARS

*April 22, 2009*

**MATH**

ONE CHILD IN THE U.S. THROWS OUT ABOUT 180 DISPOSABLE CONTAINERS EACH SCHOOL YEAR HOW MANY CONTAINERS WILL HE OR SHE THROW OUT IN 2 YEARS

*April 22, 2009*

**5th grade**

IN THE UNITED STATES EACH PERSON CREATES ABOUT 4 POUNDS OF WASTE EVERYDAY HOW MANY POUNDS OF WASTE WILL PEOPLE MAKE IN 5 WEEKS

*April 22, 2009*

**social studies**

what are some different ideas scientists have about where the first Americans came from?

*March 17, 2009*

**Math**

Find the y- and x-intercepts for the equation. I have an idea of how to do this but want to make sure I am going in the right direction! Thanks! 4y = -28 + 7x

*March 2, 2009*

**Math**

Please simplify. Write your answer using positive exponents. (8^2)^ -1 =? In case you are having trouble reading it, it translates to: (8 squared) to the -1 power (exponent) or (8 ^2) ^ -1 = ? Any ideas? I have an idea, but would appreicate some feed back! Thanks!

*February 28, 2009*

**Math**

Find the slope of the line that goes through the given points. I think my answer is correct but would appreciate some feedback so that I may compare! Thanks in advance! (3,-2),(-1,-6)

*February 26, 2009*

**Algebra**

Find the slope of the line that goes through the given points. I think my answer is correct but would appreciate some feedback so that I may compare! Thanks in advance! (3,-2),(-1,-6)

*February 26, 2009*

**Algebra**

I need 3 ordered pairs of points that would be solutions to this equation. Can anyone help please, thanks! 4x - y = 7

*February 18, 2009*

**Algebra**

Hi! Does 4 over the square root of 12 reduce to 4 over 2 times the square root of three?

*December 15, 2008*

**205**

2.c 3.c 4.c 6.c 7.c 8.c 10.c 11.b

*May 8, 2008*

**calculus**

Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was z=-ln(-.5(t^2)+1) THANKS

*April 16, 2008*

**calculus**

Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was z=-ln(-.5(t^2)+1) THANKS

*April 14, 2008*

**chemistry**

correction: the base is NaOH and acid is HC2H3O2

*April 9, 2008*

**chemistry**

What is the pH of the solution created by combining 12.00 mL of the 0.10 M base with 8.00 mL of the 0.10 M acid base acid NaOH HC2H3O2

*April 9, 2008*

**chemistry**

I'm supposed to find the pH of .1M HC2H3O2. since this is a weak acid, i used the ICE method with the given 1.8x10^-5 ka. and i got a pH of 4.4, but it was wrong....

*April 9, 2008*

**Chemistry**

what is the pH of a 0.10 M NH3???

*April 8, 2008*

**Chemistry**

When a good indicator has been chosen, the pH at which the solution changes color is very close to the equivalience point of the titration. If this "point" for a particular titration occurs at pH x, a good indicator for the titration would be indicator. X indicator 0...

*April 8, 2008*

**calculus**

how would you find the median of a pdf picture it basically is a triangle with points (0,0) (6,.2) (10,0) I found the centroid, or where all the lines from the vertex to the middle of each side intersect and found the intersection of all three lines to be (5.33,.667) would ...

*April 8, 2008*

**calculus**

hi I posted this question earlier: what is the median waiting time for f(x)=((1/8)e^(-x/8))? I said the answer was 5.55 is this correct? thank you! and somebody helped me find the mean, but i was wondering if this was the right median. thanks

*April 8, 2008*

**calculus**

how would you find the median of a pdf picture it basically is a triangle with points (0,0) (6,.2) (10,0) do i need to find the slopes to find equations for the lines? thanks!

*April 7, 2008*

**calculus**

what is the median waiting time for f(x)=((1/8)e^(-x/8))? I said the answer was 5.55 is this correct? thank you!

*April 7, 2008*

**calculus**

could some body please check this for me? 1. find the exact coordinates of the centroid of the region bounded by y-x^2, the x axis, the y axis, and the line x=1? I said the answer was ((3/4), (3/10)) 2. Find the exact coordinates of the centroid of the region to the right of ...

*April 6, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

What happened when two fruit companies merged?

*April 6, 2008*

**PHysics-almost complete!**

ok, i thought i had an answer, but it wasn't correct...here was my work... (.615)(390)(T-373.15)=(.244)(418.6)(T-293.15)=0 T=349.2571663 -> C=76.1071663 When I used that T in the equation it worked... =(

*December 4, 2007*

**PHysics-almost complete!**

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

*December 4, 2007*

**Physics, almost have it!**

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

*December 4, 2007*

**Physics help please**

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

*December 4, 2007*

**PHYSICS**

In a physics lab experiment, a student immersed 205 one-cent coins (each having a mass of 3.00 g *.003kg) in boiling water. After they reached thermal equilibrium, she quickly fished them out and dropped them into 0.244 kg of water at 20.0 C in an insulated container of ...

*December 3, 2007*

**biology**

What are invariant amino acids and where are they located? I keep googling it but I cannot find any information just journal articles Thank you for using the Jiskha Homework Help Forum. Since we don't know which links you have tried, here are some thay may help you: 1. ...

*March 17, 2007*

**Financial Analysis - free cash flows**

b. Do negative values of free cash flow in way alter or invalidate the notion that a company's fair market value equals the present value of its free cash flows discounted at the company’s weighted average cost of capital? Suppose a company's free cash flows were ...

*March 1, 2007*

**physics PLEASE HELP**

I know its hard me explaining: In a problem I have it shows a picture of wave and shows the horizontal displacement from the halfway point of one peak of one wave to the halfway point of the trough right next to it. The choices are A: wavelength/2 B: wavelength C: 2 X ...

*February 21, 2007*

**waves (please help)**

I know its hard me explaining: In a problem I have it shows a picture of wave and shows the displacement from peak of one wave to the trough of the next. The choices are A: wavelength/2 B: wavelength C: 2 X amplitude D) period E) period/2 It doesnt show the height for an ...

*February 21, 2007*

**Economics**

One of the important changes in the world economy over the past three decades has been the rapid increase in capital investment in the countries of the Pacific Basin (notably Japan and Korea). What are the implications of this investment for the commodity patterns of trade of ...

*February 18, 2007*

**Financial Analysis**

Reposting generically: How does a huge investment in cash affect a company's return on equity and its sustainable growth rate? As shareholder, would you endorse a large investment in cash? As a senior executive, how would you defend the investment?

*February 17, 2007*

**Financial Analysis**

In general terms, how does Oracle’s huge investment in cash affect its return in return on equity and its sustainable growth rate? As an Oracle shareholder, would you endorse Oracle’s investment in cash? As an Oracle senior executive, how would you defend the policy?

*February 17, 2007*

**math**

what is the squar root of 256 16

*January 18, 2007*

**"My Antonia"**

A new critc reading "My Antonia" would find many components worth consideration, like Cather's lush descriptions of the prarie and vivid portrayls of living with only the barest essential. Wite a formal paragraph to this question- Analyze the importance of the ...

*January 10, 2007*

**English"My Antonia"**

I need some help writing an essay on this topic- Discuss how realism affects the way a reader might approach the different issues in "My Antonia" such as suicide, the representation of the harshness of the prarie, or Jim's views of life. I'm not sure what to ...

*January 8, 2007*

**Biology**

What is an analogies for Mitochondria,Chloroplast, Cytoskeleton and Ribosome. http://www.google.com/search?hl=en&lr=&as_qdr=all&q=+%22Mitochondria+are+like%22&btnG=Search http://www.google.com/search?as_q=&hl=en&num=10&btnG=Google+Search&as_epq=Chloroplast+is+like&as_oq=&as_eq...

*December 30, 2006*

**science**

im stuck im 11 i have a twin she is more cleaver she told me that Their is a phisical change the phisical change is the wax starts to melt.The chemical change is the light and heat energy is produced .thier is a diffeence beetween a phisical and a chemical the difference is ...

*October 20, 2006*

**math**

I need a answer to 35+85+443 563 41 563 umm like adding them?or average or what??

*October 3, 2006*

**insclee**

sleec

*September 28, 2006*

**Punctuating Sentences check please**

All though they say that eskemos are the natives of alaska; there wrong, the true natives of alaska are the wolves.

*August 8, 2006*