Sunday

February 19, 2017
Total # Posts: 117

**Chemistry**

"What volume of water must be added to 100ml of 15 M of H2SO4 to dilute to 5.0M?" I've tried using lots of different methods but keep having the same answer and don't know if the answer book is wrong or if it's me. Thanks!

*January 18, 2017*

**hypothesis**

Yeah, but why do we need to test the results?

*January 15, 2017*

**hypothesis**

Why is it important to test the results of a hypothesis?

*January 15, 2017*

**math**

can't see the boxes. are there addition or multiplication problems? what does it look like?

*January 9, 2017*

**All**

because they didn't submit medical documentation for proof of absence.

*January 9, 2017*

**Math**

Which is 9%?

*January 9, 2017*

**Math**

Oh! So, then the relative rate is: R1/R = 30-.6q/30q-(0.3q^2) ?

*January 9, 2017*

**Math**

The revenue obtained from the sale of q units of a product is given by : R= 30q-(0.3q^2) A) How fast does R change with respect to q when: q=10 B) Find the relative rate of change of R, and to the nearest percent, find the percentage rate of change of R.

*January 9, 2017*

**Math**

Purchased 297 square feet of carpet at $18.50 a square yard, what is the cost? 297 / 9 = 33 yards X $18.50 =$610.50 Do I divide by 3 again to get $203.50?

*December 14, 2016*

**Math**

(4 to the second power divided by two)subtract 2 to the second power plus five

*November 2, 2016*

**History**

1) A 2) D 3) A 4) B 5) C 6) C 7) D 8) C 9) C 10) A

*September 28, 2016*

**American government**

Beccky is right 10-10 (100%)

*August 18, 2016*

**geometry**

ray EC bisects angle BED, The measure of angle AEB equals 11x minus 12.and The measure of angle CED equals 4x plus 1.. Find measure of angle AEC.

*June 30, 2016*

**math**

i don't know

*March 7, 2016*

**Science 8**

I actually think it is C but i am not sure either

*November 30, 2015*

**Math**

There are 41 students in group 2. Twice as many students play the trumpet as play the trombone, but 8 students play the saxophone. How many students in Group 2 play each instrument? Endless thanks

*November 4, 2015*

**Math**

Simplify this expression. -12÷3•(-8+(-4^2)-6)+2. I'm confused on how to solve this. Thank you for the help.

*September 9, 2015*

**Chemistry**

Is Vanila a compound ? Is butter a compound ? Is sugar a compound? Is Brown sugar a compound ?

*September 2, 2015*

**gum**

I think its C or B

*May 5, 2015*

**Algebra-VERY IMPORTANT**

Given the polynomial x^2+10x+k Find all the values of k so that this given polynomial is factorable

*April 21, 2015*

**College Physics**

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1050Kg and was approaching at 8.00m/s due south. The second car has a mass of 700Kg and was approaching at 20.0m/s due west. A) Calculate the final velocity of the cars.(Note ...

*April 16, 2015*

**Math (Algebra 1)**

95

*November 15, 2014*

**Math**

a baseball team played a total of 138 games last season. They had 26 fewer wins than losses. How many games did the team win?

*November 3, 2014*

**physics**

A ball is thrown directly downward with an initial speed of 3.08 m/s from a height of 14.6 m. After what interval does the ball strike the ground? The acceleration of gravity is 9.8 m/s 2

*September 22, 2014*

**chemistry**

Why is respiration an exothermic reaction?

*June 18, 2014*

**Chemistry**

What type of reaction is photosynthesis, the process where carbon dioxide combines with water to form glucose in the presence of sunlight?

*June 18, 2014*

**chemistry**

In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?

*June 18, 2014*

**Algebra**

Total revenue is the total amount of money taken in by a business. An appliance firm determines that when it sells X washing machines, the total revenue, R, in dollars, is given by the polynomial R=232.94x-0.1x^2. What is the total revenue from the sale of 238 washing machines...

*February 25, 2014*

**Algebra**

Total revenue is the total amount of money taken in by a business. An appliance firm determines that when it sells X washing machines, the total revenue, R, in dollars, is given by the polynomial R=232.94x-0.1x^2. What is the total revenue from the sale of 238 washing machines...

*February 25, 2014*

**Algebra**

Solve using the appropriate method. 0.05x+0.25y=66 0.15x+0.05y=72 I came up with the answer (420,180) Is this correct? a)The solution is___?(simplify your answer. Use integers or fractions for any numbers in the expression. Type an ordered pair) b)Infinitely many solutions c)...

*February 22, 2014*

**Physics**

You are pulling a crate across the floor. The crate has a mass of 75.0 kg. You exert a horizontal force of 120. N to the left. Friction exerts a force of 82.0 N to the right. What is the magnitude (fill in box) and direction of the acceleration of the crate?

*February 5, 2014*

**AP Calculus AB**

Find the derivative of: y=(cosx)^3-(sinx)^3

*January 3, 2014*

**PHYSICS**

If a boy(500N) wishes to slide down a rope that has a breaking stand of 350N, then: (a) with what acceleration must it move downward in order to not break the rope. (b) if he slide 30m, how long will it take? (c) how fast will he be going before he hits the ground?

*November 30, 2013*

**PHYSICS**

Thank You!

*November 30, 2013*

**PHYSICS**

The tension in the cable supporting a 4900N elevator is 3800N. What is the acceleration of the elevator?

*November 30, 2013*

**English**

We plant two bean seeds in different pots. What's the subject?

*September 4, 2013*

**Physics**

Note: I used PV=nRT to solve (there are 0.400 mol), but the answer I got was incorrect; the hint I received was that all the water has evapourated.

*June 22, 2013*

**Physics**

A cook puts 7.20 g of water in a 2.00-L pressure cooker that is then warmed to 530°C. What is the pressure inside the container? (Assume room temperature is 20°C.)

*June 22, 2013*

**Physics**

A 2.60-mol sample of oxygen gas is confined to a 5.03-L vessel at a pressure of 7.95 atm. Find the average translational kinetic energy of the oxygen molecules under these conditions.

*June 22, 2013*

**Physics**

Three uniform spheres of masses m1 = 3.50 kg, m2 = 4.00 kg, and m3 = 6.50 kg are placed at the corners of a right triangle (see figure below). Calculate the resultant gravitational force on the object of mass m2, assuming the spheres are isolated from the rest of the Universe...

*June 20, 2013*

**physics**

The free-fall acceleration on the surface of Jupiter is about two and one half times that on the surface of the Earth. The radius of Jupiter is about 11.0 RE (RE = Earth's radius = 6.4 106 m). Find the ratio of their average densities, ρJupiter/ρEarth.

*June 16, 2013*

**French**

Est-ce que je pourrais poser des questions? Puis-je poser des questions?

*June 8, 2013*

**Physics**

Oh. F(along radius) = ma μmg=mv²/r μg=v²/r μgr=v² v²=(0.550)(9.80)(37.9) v ~= 14.3m/s

*June 1, 2013*

**Physics**

A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. The curve may be regarded as an arc of a circle of radius 37.9 m. If the coefficient of static friction between crate and truck is 0.550, how fast can ...

*June 1, 2013*

**French**

*Quand est-ce que tu es né(e)? D'être un peu plus poli(e): **Quand est-ce que vous êtes né(e)(s)? "est-ce que" ("is it that"), not "est que" ("is that").

*May 23, 2013*

**algebra**

A boat can travel 16 km/h against the current.The same boat can travel 30 km/h with the current.find the rate of the boat in still water and the rate of the current. Could someone help me.it seams like an easy problem, but I am not getting there.Thank YU very much.

*March 14, 2013*

**Physics**

You are standing on top of a building that is 75-m high and you throw a 3-kg stone horizontally at a speed of 5.4-m/s. How far from the base of the building will the stone land? (the ground is flat)

*March 11, 2013*

**algebra**

A shipment of 18 cars, some weighting 3000lbs a piece, and the others weighing 5000 lbs each, has a total weight of 30 tons. Find the number of each kind of car. I start of saying X+Y = 18. THen I turn that into X=18-Y. whats next?? thank you for helping if u can.

*March 6, 2013*

**algebra**

Solve the following system of equation using the graphing method. Y = negative X Y = X + 9 Don't know what to do. Thank u if u can helpme.

*March 2, 2013*

**algebra**

but the x is already there in the first digit because it is somethin=x and shouldnt it be : x-0.25 = 6000?? why x - 0.25x = 6000??

*January 6, 2013*

**algebra**

and where did you get 0.75 from??

*January 6, 2013*

**algebra**

Wy did you put 0.25x in the first line? x reps what?

*January 6, 2013*

**algebra**

what number minus 25% equals 6000?

*January 6, 2013*

**Co-op**

yes but the male to female ratio and stuff like the graphss that will all be different..please help me:( Can you just help me with these parts for the pharmacy technician : - Required skills: a) job specific skills b) Transferable skills - Employmentoutlook for future salary ...

*January 6, 2013*

**algebra**

a minus the fraction a^2-a-6 over 2(a-3) thank you

*January 3, 2013*

**algebra**

please help because am missing something.thankyou factor completely given that x+2 is a factor. 2x^3 + 7x^2 - 3x - 18

*January 2, 2013*

**Algebra**

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

*December 31, 2012*

**Algebra**

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

*December 31, 2012*

**algebra**

Please help THANKS write as a fraction in simplest form (a/b +1)(b/a-1)

*December 31, 2012*

**algebra**

3 - __2X-2______ X^2-1 Write the expression as a fraction in simplest form. 3 minus 2x-2 over xsquared minus 1 Can anyone help?

*December 31, 2012*

**Algebra**

What is 2a^2 over 4b times b^2 over a^2 or what is 2a squared over 4b, times b squared over a squared ? Thankyou

*December 10, 2012*

**Algebra**

Help Please! 2n(x-n)=x-5n+2 Solve for X

*December 6, 2012*

**pre-calc**

F(x)= x^2+x-12/ x^2-4 find the x and y intercepts and find x when f(x)=1

*November 16, 2012*

**math**

hey Anabelle what is 55-10

*November 13, 2012*

**math**

what graphs are there Ms Sue just tell me

*November 13, 2012*

**math**

i don't know what the graph is called

*November 13, 2012*

**math**

i don't know what kind of graph it is

*November 13, 2012*

**math**

your welcome Anabelle

*November 13, 2012*

**math**

a median is the middle

*November 13, 2012*

**algebra**

For the statement that says: b + (-a) = b - a What property would that be? Is it the addition property of equality? or something else.

*October 13, 2012*

**Algebra**

The total amount of water in 2 containers is 35quarts. If 7 quarts gets poured from the container with less water into the continer with more water, the container with more water will have 4times as much water as the other container. How many quarts are in the container with ...

*October 13, 2012*

**University of Phoenix**

target marketing in contrast to mass marketing

*August 12, 2012*

**HCA 270**

What is the relationship between inventory and cost of goods sold by a pharmacy or medical supply business? Explain the depreciation concept. What items in a physician practice can be depreciated? What is the purpose?

*May 7, 2012*

**Chemistry**

Got it - thank you.

*April 27, 2012*

**Chemistry**

1. What mass of carbon is required to produce 100kj of heat, when burned in air? Enthalpy change = -392kj. 2. What mass of methanol is required to produce 1000kj of heat, when burned in air?

*April 27, 2012*

**algebra**

Kayla Wants To write an Expression that will always produce an odd integer. Which of the Following will always produce an odd integer for any given integer ?

*April 9, 2012*

**science**

An object is traveling in a straight line in space.No forces are affecting it. What will happen to the object's motion?

*March 24, 2012*

**science**

A book is on top of a table. Earth's gravity exerts a constant force of 15N on the book. Why does the book not move as a result of this force?

*March 24, 2012*

**Physics**

A JFET has a specified pinch-off voltage of -5V. When VGS = 0, what is VDS at the point where ID becomes constant?

*March 9, 2012*

**COLLEGE CALCULUS.**

hey mily how u get result for m?

*March 2, 2012*

**COLLEGE CALCULUS.**

Use implicit differentiation to find the equation of the tangent line to the curve xy^3+xy=5 at the point (4,1) . The equation of this tangent line can be written in the form y = mx+b where m is:? and where b is:?

*March 2, 2012*

**Chemistry**

Perform the following calculations to the correct number of significant figures. (89.6-23.981)/0.0047

*January 30, 2012*

**physics**

F(along radius) = ma μmg=mv²/r μg=v²/r μgr=v² v²=(0.590)(9.80)(36.5) v ~= 14.5m/s

*October 18, 2011*

**math**

at the beginning of the week a particular stock sold for 29 3/8 per share. at the end of the same week it sold for 31 2/8. what was the amount of inctrease per share?

*May 28, 2011*

**math**

105 miles

*March 19, 2011*

**Chemistry**

All I know is that Marcus is wrong because solids don't have to become liquids before they become gas. That is what is the case with dry ice. It becomes a gas before it has the time to go to a liquid.

*January 31, 2011*

**Calculus**

For f(x)=lnx, construct tables, rounded to four decimals, near x=1, x=2, x=5, and x=10. Use tables to estimate f'(1), f'(2), f'(5) and f'(10). Then guess a general formula for f'(x).

*January 29, 2011*

**Calc**

Use a graph to estimate the limit: lim θ->0 (sin(5θ)/θ) Note: θ is measured in radians. All angles will be in radians in this class unless otherwise specified. I tried graphing it on my calculator but the limit I got is incorrect.

*January 25, 2011*

**Calc**

Sorry! That was a typo. It was as the limit approaches 4. I'm still confused on how to find the y intervals.

*January 25, 2011*

**11th grade math**

what is the perimeter of the smaller triangle

*December 19, 2010*

**english**

can you answer this one into correct dangling modifier.Having wrapped up the package carefully it should be tied.

*December 5, 2010*

**Physics**

A 0.400 kg block of wood hangs from the ceiling by a string, and a 0.0700 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 5.80 m/s. The wad of putty sticks to the block. Is the mechanical energy of this system conserved? yes or no (b...

*November 14, 2010*

**chemistry**

if you have 5 moles of conjugate acid, 2 moles of base, and 2 moles of acid. What is the dissociation constant for his reaction and the temperature is 30 degree celcius?

*September 16, 2010*

**science**

I am doing a case study on MMR and MMR/Autism. The question I have been given is 'Does MMR cause autism?" Please can you suggest any websites etc. I need to find at least 5 sources to show for and against. Many thanks.

*May 2, 2010*

**Precalculus(NEED HELP ASAP PLEASE!!)**

If sin t=-1/4, find sin t + 6pi

*March 28, 2010*

**law**

what are laws

*March 3, 2010*

**law**

what are laws

*March 3, 2010*

**chemistry**

The vapor pressure of dichloromethane, , at 0 is 134 . The normal boiling point of dichloromethane is 40. . Calculate its molar heat of vaporization

*January 20, 2010*

**home economics**

explain the term energy balance

*January 4, 2010*