Saturday

October 22, 2016
Total # Posts: 2,353

**chemistry**

0.350 L of 0.470 M H2SO4 is mixed with 0.300 L of 0.250 M KOH. What concentration of sulfuric acid remains after neutralization?

*October 18, 2016*

**Maths**

A plane flies a course of 346 degrees and then turns through 30 degrees in the clockwise direction. Find its new bearing. Since the plane from starting point covers a bearing of 346 degrees it's now going to be in the NW direction but going 30 more degrees clockwise thats...

*October 18, 2016*

**Math**

the towns highway department marks a new road with reflective markers the road is 6 3/4 miles in length the markers are spaced every length 1/8 of a mile

*October 14, 2016*

**social studies**

?

*October 13, 2016*

**social studies**

So its B

*October 13, 2016*

**econ**

given p=68-4qd-qd^2 p=12+2qs+qs^2 where p is the price qd is the quantity demanded qs is the quantity supplied determine the uquilibrium and the quantity of the commodity

*October 13, 2016*

**Basic math **

A ladder 10 feet long leans against a building the base of the ladder is 6 feet how high is the paint where the ladder touches the building

*October 13, 2016*

**Basic math **

A 15 foot ladder propped against a wall the base of the ladder is 3 feet from the wall how far up the wall does the ladder reach.

*October 13, 2016*

**math 1**

What is the value of the expression below? (2^-4)(3^0)(7)/(5^-2)(4^-2)(175) Remember: Negative exponents in the denominator move to the top with its base, and negative exponents in the numerator move to the bottom with its base. In both cases you should drop the negative sign...

*October 12, 2016*

**math 1**

How do i put a pitcure because the problem is a picture

*October 12, 2016*

**math 1**

Please help with this i don't under stand it at all Hint: Copy and paste in in the search bar.

*October 12, 2016*

**math 1**

file:///C:/Users/Elvis/Downloads/34c349524b928a5f67768aa8eb6e1c02.png

*October 12, 2016*

**math**

Answer is -16 :)

*October 12, 2016*

**math**

ive got it ive seen my mistake

*October 12, 2016*

**math**

Find the values of x and y in the two equations below then answer the question that follows. 2^-3=1/x 7^y=1/49 What is the value of xy ? For the first problem i got 8. For the second one i got 1/343 I don't know what im doing wrong or right. Can you please show me with work.

*October 12, 2016*

**Chemistry**

Based on the standard reduction potentials given below, which species is most likely to be oxidized? Ag+ + e- → Ag, Eo= 0.80 V Cu2+ + 2e- → Cu, Eo= 0.34 V Zn2+ + 2e- → Zn, Eo= -0.76 V Cd2+ + 2e- → Cd, Eo= -0.40 V I thought the answer would be Zn2+ that...

*October 12, 2016*

**Chemistery **

Calculate the concentration of O 2 if K c = 270 for the reaction 2SO 2 (g)+O 2 (g)⇌2SO 3 (g) .

*October 10, 2016*

**College Algebra**

Tammy can do a certain job in 6 hours. Kris can do the same job in 8 hours. If Tammy and Kris work together to complete the same job, how many hours will it take for them to complete it?

*October 8, 2016*

**Calculus - Approximation**

Use linear approximation, i.e. the tangent line, to approximate cubed root { 1.1 }. The equation of the tangent line to f(x) at x = 1 can be written in the form y = mx+b. Show your work. Do not use a calculator.

*October 7, 2016*

**Math - Calculus 1**

Approximate using derivatives. (Must show work using derivatives!) Do not use a calculator: (1.1)^4 - (1.1)^2

*October 7, 2016*

**Calculus - Related Rates**

Suppose that you are watching a spaceship take off. You are 100 meters from the launch pad, and you measure the angle made by the rocket and the ground to be increasing at a rate of (d)(theta)/dt = 0.1 radians per second. What is the velocity of the rocket when theta = pi/4?

*October 7, 2016*

**Physics**

usain bolt set the world record for the 100m dash, proving to be the fastest man in history, with a time of 9.58s. what was bolt's average speed in miles per hour? (his initial speed was 100m/9.58s I got 23.35 mph for this I need help with this. VVVVVVVVVVVVVV assume that ...

*October 4, 2016*

**math**

Joe is playing a game with a regular die. if the number that turns up is even he will gain 5 times the number that comes up. if it is odd, he will lose 10 times the number that comes up. he tosses a 3. express the results as an integer

*October 4, 2016*

**College math**

A bag contains 9 white 7yellow marbles,8 green marbles. If one marble is drawn from the bag then replaced, what is the probability of drawing a white marble then a green marble?

*October 1, 2016*

**Help with compute probability **

Compute the probability of randomly drawing five cards from a deck and getting 3 Aces and 2 Kings. (Give your answer as a fraction.) Probability

*October 1, 2016*

**Chemistry**

So I've done as you said and have come up with the following: C (g) = 0.0437g H (g) = 0.00583g O (g) = 0.01167g C(mol)=0.00364mol H(mol)=0.00578mol O(mol)=0.000729 I then divide for the ratio (Mm=m/n) and get 12 for C, 1 for H, and 16 for O, making the formula: C12HO16, ...

*September 22, 2016*

**Chemistry**

Sorry, it's 0.06120 g produced 0.1601 g of CO2 and 0.05243 g of H2O

*September 22, 2016*

**Chemistry**

Hey, can someone help me with this? A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.120Ã—10^-2 g produced 1.601Ã—10^-1 g of CO2 and 5.243Ã—10^-2 g of H2O. Determine the empirical formula of the ...

*September 22, 2016*

**Precalculus**

Thank you so much!!! I see what I was doing wrong now. PS: You have good handwriting :)

*September 19, 2016*

**Precalculus**

Yeah, I tried drawing a diagram, but I just keep getting confused.

*September 19, 2016*

**Precalculus**

In triangle ABC, we have AB=3 and AC=4. Side BC and the median from A to BC have the same length. What is BC? Please help, I have no idea where to start.

*September 19, 2016*

**math**

a man sleeps 8 hours a day. how many hours can he sleep in a year?

*September 19, 2016*

**math**

Sara is thinking of a number when she rounds her number to the nearest hundred,she gets 700.What is the greatest number Sara can be thinking of?Explain

*September 13, 2016*

**Please check my answer(Social Studies)**

So what's the answers

*September 13, 2016*

**Physics**

A drag racer starts her car from rest and accelerates at 4.8 m/s 2 for the entire distance of 409 m. How long did it take the car to travel this distance?

*September 13, 2016*

**Science**

Which of the following means using specific observations to make generalizations? A: BIAS B: Subjective C: Deductive Reasoning D: Inductive resoning is the answer c?

*September 12, 2016*

**Social Studies**

yes he is correct 5 is c

*September 12, 2016*

**home economics**

what are the branches of fibre

*September 11, 2016*

**Physics**

A block of mass m1= 3.70kg rests on a 30degree incline and is held stationary by a mass of 1.3kg hanging vertically over a frictionaless pulley at the top. Calculate the value of u (coefficent of friction)

*September 8, 2016*

**Physics**

56.7 m

*September 7, 2016*

**Math**

How do you write 4,000,000,000 + 20,000,000 + 500,000 + 60,000 + 1,000 + 300 + 40

*August 30, 2016*

**Chemistry**

24.332

*August 28, 2016*

**math**

6 people like soccer, 3 like volleyball, 7 likefootball, and 2 likebasket ball show that in tallies

*August 23, 2016*

**Economics**

Consider a single price monopoly that faces a market demand curve for a good is given by the equation 𝑃=100−.1𝑄 and the total cost function is given as 𝑇𝐶=1000+20𝑄+.4𝑄2. a. What is the total fixed cost for this monopoly? P=...

*August 23, 2016*

**Social Studies**

Thank you Anonymous

*August 18, 2016*

**Social Studies**

Everyone needs to chill 1. If Ms.Sue is gay so what, If you don't like it go somewhere else and get the answer 2. Ms.Sue is a human if she got it wrong, OK y'all never made a mistake? Should we be mean to you for your mistake? Shes only human y'all can have a ...

*August 18, 2016*

**science**

The boy A weighs 50 kg and the girl B weighs 35 kg in a seesaw...the board of the seesaw is 3.6 meter... To balance the seesaw where should girl C who weighs 25 kg seat or what particular distance should girl C seat to balance it

*August 18, 2016*

**Calc**

Find the value of m such that y=mx divides the area under the curve y=(1-x)x in [0,1] into two regions of equal area D: D: D:

*August 17, 2016*

**Math**

Solve the equation: (1) 5/2 = 3x; x= (2) 7/2 = 4x; x=

*August 15, 2016*

**Math**

Solve the equation: (1) 5= 6y; y (2) 7/2 = 4x; x

*August 15, 2016*

**Math **

Solve the equation: 9/5 = 1 + m; m

*August 15, 2016*

**Math**

Solve the equation 1) 4= 5y; y = 2) 7/4 = 1 + m; m= 3) 7= 6y; y

*August 15, 2016*

**Maths**

Prove that sin2x+cos2x-1/sin2x+cos2x+1=tanx

*August 9, 2016*

**Math **

A fossilized leaf contains 21% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.

*August 3, 2016*

**Science (Biology)**

krfkrfrf

*July 30, 2016*

**Math**

A car is traveling at a rate of 35 meters per second. What is the car's rate in kilometers per hour? How many kilometers will the car travel in 3 hours? Do not round your answers.

*July 29, 2016*

**Math**

solve these questions using distributive property 30% Of 10= 30% of 20= 30% of 30=

*July 23, 2016*

**Calc **

a large closed storage rectangular box with a base constructed with two different types of wood. the base is made up of wood $5 per square feet and the top and sides are made of wood $3 per square feet suppose the amount available to spend is $1000 find the dimensions of the ...

*July 20, 2016*

**math**

The angles of elevation of a balloon directly above a straight road, from two points of the ground on opposite sides of the balloon, are 78¡ã15' and 59¡ã47'. If the points are 5000ft apart, what is the height of the balloon?

*July 20, 2016*

**ENGLISH**

A creative writing teacher tells students to publish their writing projects in a nonprint format. Which of the following techniques would not meet the teacher’s requirements?

*July 13, 2016*

**Chemistry**

14 grams of coal undergoes complete combustion in 58 grams of oxygen gas. What volume of gas (measured at 25 degrees celsius and 100 kPa) is present when the reaction is complete?

*July 11, 2016*

**Calculus**

Launching a missile to hit a target 100 miles away. Determine the launch speed of the missile along with the angle at which it's to be fired. Also, show your work and one of the angle that will work. Finally, assume that the only force acting on the missile is gravity.

*July 7, 2016*

**Maths**

The sum of the interior angles o a regular polygon is 30 right angles. How many sides have the polygon?

*July 7, 2016*

**University of Liberia Chemistry 102**

Using a current of 4.75A how many minutes does it takes to plate onto a sculpture 1.50g of CuSO4 solution?

*June 29, 2016*

**Math**

If the 16th term of an arithmetic sequence is three times the fourth term, find the ratio of the 23rd term to the third term.

*June 27, 2016*

**physics**

7.500N

*June 18, 2016*

**physics**

calculate the net force required to give a 3000kg trucks an acceleration of 2.5m/s^2

*June 18, 2016*

**Calculus- PLEASE HELP**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 14, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus- Reiny **

Thanks for the help, but do you understand what Im suppoosed to graph on 2D d) Use a graphing calculator to sketch the graph of y = V(x). Use the viewing window [0, 24, 4] by [-2500, 4000, 500]. Then use the 2 nd – TRACE – maximum feature to calculate its maximum ...

*June 13, 2016*

**Calculus**

A rectangular piece of tin has an area of 1334 square inches. A square tab of 3 inches is cut from each corner, and the ends and sides are turned up to make an open box. If the volume of the box is 2760 cubic inches, what were the original dimensions of the rectangular piece ...

*June 13, 2016*

**math**

Would it be: (-1, 14) and (6,7)?

*June 13, 2016*

**math**

I'm still pretty lost.. :/

*June 13, 2016*

**math**

what are the solutions to the system? y=x^2 - 6x+7 y=-x+13

*June 13, 2016*

**Chemistry**

A Chemist wanted to determine the percentage of calcium carbonate in a sea shell. He collected a number of sea shells which he crushed into a fine powder. To 2.65 grams of sea shell powder he added 25.0mL of 5.0M Hydrochloric acid. When all the fizzing ceased, he filtered the ...

*June 13, 2016*

**math/algebra**

thank you so much. I thought so.

*June 9, 2016*

**math/algebra**

The surface area of a rectangular prism is SA=2lw+2wh+2lh. The volume of a rectangular prism is V=lwh. Write an expression for the ration of surface area to volume.

*June 9, 2016*

**chemistry**

Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. When 75.0 mL of the NaIO3 solution have been added, what is the concentration of the Cr(III) ion remaining in solution? not sure how ...

*June 9, 2016*

**chemistry**

The Kb of ammonia is 1.8 x 10–5. What is the percent ionization of a solution of ammonia, 0.50 mol L–1 NH3, that contains 0.020 mol L–1 of ammonium nitrate, NH4NO3? when i use the ICE table i don't end up with an unknown so im not sure what to...

*June 9, 2016*

**chemistry**

thank you! :)

*June 8, 2016*

**chemistry**

At equilibrium, a solution of formic acid at 25°C has a pH of 2.18. The pKa of formic acid, HCOOH, is 3.74. Which of the following is the initial concentration of the solution? Not sure what to do my thoughts: use henderson hasselback equation pH = pKa + log [conj ...

*June 8, 2016*

**statistics**

the amount of pyridoxine in grams per multiple vitamin is normally distributed with mean = 110 grams and standard deviation = 25 grams. What is the probability that a randomly selected vitamin will contain between 100 and 110 grams of pyridoxine?

*June 3, 2016*

**algebra**

y varies inversely with x, and y = 10 when x = 2. What is the equation for the inverse variation?

*June 3, 2016*

**Chemistry**

When the ratio of neutron-to-proton dictates that a neutron must break down it will form a helium nucleus an alpha particle a proton and an electron*** Two protons

*June 1, 2016*

**Chemistry**

Which of the following materials is necessary to stop gamma radiation one foot of concrete single sheet of paper thin pieces of wood three inches of lead***

*June 1, 2016*

**Math**

vvvvvvvvvvvvvb

*May 29, 2016*

**Math**

hi

*May 29, 2016*

**Calc**

Find the number b such that the line y = b divides the region bounded by the curves y = 4x2 and y = 16 into two regions with equal area. (Round your answer to two decimal places.)

*May 27, 2016*

**math or algebra **

F2088nd the next three terms of the sequence. -2, -12, -72, 432. Possibilities are: 1. -1728 -6912 -27,648 2. -1728 -10,368 -62,208 3. -2592 -10,368 -41,472 4. -2,592 -15,552 -93,312 I have tried multiplying positive numbers times the negative but can't make the numbers ...

*May 22, 2016*

**MATH HELP !!!!!**

I know a fraction is the answer but can't make it work for the probability question asking for what is the chance you will pull a pink eraser out of a,container that has 5 green .2 striped.4 pink.and 3 white.?

*May 19, 2016*

**Math**

5 HOURSS IS THE ANSWER

*May 16, 2016*

**Math**

answer

*May 16, 2016*

**Math**

Square is 20 feet wide and 21 feet long what is the disdence from one corner to the other

*May 15, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**physics**

Three point charge of 2NC 7NC and - 4NC are located at the corners of an equilateral triangl as shown below. Caculate the magnitude and direction of the net force on the 7uc charge.

*May 9, 2016*

**algebra**

a student measures the height of a sign to be 2 meters. the shadow of the sign 3 meters. the student notices that at the same time nearby tree has a shadow of 15.6 meters. how tall is the tree? What equation would be used for this?

*May 5, 2016*

**Chemistry **

Calculate the ph of a solution that is 0.157m HCI?

*May 4, 2016*

**LA**

Anonymous is right thanks

*May 4, 2016*

**Math**

Two telephone poles are 60ft. apart, and one of them is 6ft. higher than the other. If the length of the wire between the poles is 61.3 ft., how much wire was allowed for sag?.

*April 30, 2016*