Tuesday

January 24, 2017
Total # Posts: 1,324

**CHEMISTRY**

You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.22l.

*January 9, 2017*

**integral calculus**

integrate: [ cos ^ 2 (x) * sin (x) / ( 1 - sin(x) )] - sin (x)

*January 2, 2017*

**Language Arts (ASAP)**

I'm not trying to cheat. I'm trying to get help. Do you see me asking for answers on questions?? No. I asked for H-E-L-P.

*December 6, 2016*

**Language Arts (ASAP)**

Thanks @Writeacher

*December 6, 2016*

**Language Arts (ASAP)**

I did. I'm still pretty confused. Please help! @Writeacher

*December 6, 2016*

**Language Arts (ASAP)**

3. In "All Together Now," Jordan uses appeals to emotion and appeals to reason to try to persuade her readers that her views are important. In a paragraph, cite one example of each kind of appeal in her work. Then, explain whether you find Jordan's appeals ...

*December 6, 2016*

**physics**

a stone is dropped from a height of 100 m. How long will it take to hit the ground? with what speed will it hit the ground?

*December 1, 2016*

**physics**

the angular speed of the hour hand of a clock is

*December 1, 2016*

**physics**

at any instant a car is observed to be moving at a velocity of 10 m/s. Five seconds later the car is found to be moving at a velocity of 20 m/s. how far did the car travel in 5 s?

*December 1, 2016*

**physics**

a car is slowing down while it is moving west. the direction on the car is ?

*December 1, 2016*

**Chemistry**

An electron in the n = 10 state of a hydrogen atom emits a photon with energy of 6.54×10–20 J. What is the final state of the electron

*November 19, 2016*

**Algebra**

An engineer designs a satellite dish with a parabolic cross section. The dish is 14 ft wide at the? opening, and the focus is placed 4 ft from the vertex. ?a) Position a coordinate system with the origin at the vertex and the? x-axis on the? parabola's axis of symmetry and...

*November 16, 2016*

**Algebra**

Find a polynomial function of lowest degree with rational coefficients that has the given numbers as some of its zeros. sqrt of 3 and 4i disregard the first post, thanks!

*November 16, 2016*

**Algebra**

Find a polynomial function of lowest degree with rational coefficients that has the given numbers as some of its zeros. sqrt of 3, 4 Thanks!

*November 16, 2016*

**Math**

Clark's Country Pet Resort is fencing a new play area for dogs. The manager has purchased 186 yd of fence to enclose a rectangular pen. The area of the pen must be 2156 yds^2. What are the dimensions of the? pen? Length is how many yards? Width is how many yards?

*November 15, 2016*

**Chemistry**

How much mg of iron are there in 100g of spinach. if we burned 5.20g of spinach and added 10 ml of 2.0 M HCl into the spinach ashes.Then filtered the ashes and used 5 ml of that solution to put it in a testube and added 5 ml of 1.5 M KSCN in the testube. We then use a ...

*November 14, 2016*

**Math**

Jun Wei has 12 more 10 cent coins than 20 cent coins. The total value of all his coins is $5.40. Find the total number of coins he has.

*October 31, 2016*

**Math**

Thank you. is there a trick to finding all the pairs of unit fractions that will add up to 1/6?

*October 28, 2016*

**Math**

i believe 1/9+1/18=3/18=1/6. correct?

*October 28, 2016*

**Math**

What about 1/10+1/15? or 1/9+1/18?

*October 28, 2016*

**Math**

What about other pairs?

*October 28, 2016*

**Math**

1/6 is the sum of two unit fractions. how may pairs of unit fractions will equal 1/6?

*October 28, 2016*

**Science**

Thanks bean i got a 100%

*October 18, 2016*

**Algebra**

2. The table shows the heights in inches of trees after they have been planted. What is the height of a tree that is 64 in. Tall in its pot A. 42 in B. 52 in C. 60 in D. 76 in 3. Which ordered pair is a solution to y=8x A. 0,8 B. -1,8 C. 1.5,10 D. 2,16 4. Which ordered pair is...

*October 13, 2016*

**Math**

So, you're going to want to set up an equation and the proper concentration formula for this problem would be C1(Q1)=C2(Q2). C1 is your given concentration is 65% (0.65) and your second concentration (the desired concentration) is 40% (0.40). Your solution is 2.0L so that ...

*September 29, 2016*

**math**

a car traveling 64 miles per hour passes a bus traveling 53 mph in the same direction on the highway, if they maintain their speeds, how long will it take them to be 17.5 miles apart

*September 22, 2016*

**Math**

The sides of a triangle is 6,8,15 cm long. in a similar triangle, the longest side is 21 cm long find the two sides.

*September 22, 2016*

**Math**

The volume of a certain quantity of gas is inversely proportional to its pressure. If its pressure is 1000 grams per square cm, when its volume is 3m³, what will the pressure be when the gas is compressed to a volume of 2m³? (Thanks in advance in helping me here)

*September 22, 2016*

**Algebra**

A flight from a to B is against the wind and takes five hours return flight with wind takes 4.5 hours of the wind speed is 50 mph find the speed of the plane in still air

*September 20, 2016*

**Statistics**

I kept getting the question wrong because I assumed they were being replaced. Thank you!

*September 4, 2016*

**Statistics**

In a group of 54 candidates, 16 are female and the remaining are male. If four are to be randomly selected, what is the probability that there will be only female candidates selected?

*September 4, 2016*

**Math**

I think I figured out the second answer.... 1/12 ??

*September 4, 2016*

**Math**

In a group of 54 candidates, 16 are female and the remaining are male. If four are to be randomly selected, what is the probability that there will be only female candidates selected? 17 coins and 1 six-sided number cube are tossed together. What is the probability of getting ...

*September 4, 2016*

**Math**

Since the platforms are both of the same height, the velocities will be exactly the same, albeit in a negative direction. Therefore, your answer is -19.8mls.

*September 4, 2016*

**Math**

Kevin has an equal number of quarters nickels and dimes in his piggy bank, he randomly picks a coin replaces it and picks another coin. What is the probability that the sum of the two coins picked is at least thirty cents

*August 29, 2016*

**Algebra**

Find the equation for the circle with center (1,2) and passing through (-4,-3). Write the equation for the circle.

*August 26, 2016*

**Trig**

if sin(x)=-0.5 and x is in the third quadrant, find x

*August 20, 2016*

**spanish**

Complete the sentence with the correct form of the verb in parentheses. ¿Qu¨¦ ___ (hacer) Uds. despu¨¦s del trabajo hoy?

*August 17, 2016*

**math**

A isosceles right triangle has leg of 15. What is its area

*July 14, 2016*

**St.vincent**

The sum of my tens and hundreds digit is greater than 7 and a multiple of 4. My tens digit is 3 less than my one's digit.what is my number?

*June 28, 2016*

**St.Vincent math**

What is the largest number that you can form with the first five- digit odd number?

*June 28, 2016*

**Pre-Cal: Word Problem**

So basically, how would you restrict the sin/cos graph so that it becomes 1 to 1? you section off the graph via interval notations. So it would like half of a period but with its head and end cut off. (at the highest point and lowest point, so it passes the HLT - Horizontal ...

*June 23, 2016*

**Chemistry**

will red blood cells undergo hemolysis, crenation or no change at all. 10%m/v NaCl 2% m/v glucose H2O 5% m/v glucose how would I come up with the answer I read the chapter and i'm confused

*June 21, 2016*

**Math**

The measure of one angle is 38 degrees less than the measure of its supplement. What is the measure of each angle?

*June 12, 2016*

**mat**

Three times a number plus 4 equals 15 times the reciprocal of the number. Determine the number.

*June 7, 2016*

**Algebra**

Miachel wants to double the area of his garden show below by increasing the length and width by the same amount. what will be the dimensions of his garden then? use a representation and equation to solve

*May 30, 2016*

**geometry**

The two-way table shows the number of hours of sleep each of 120 student volunteers reported and their exam results. a) Find P(passing test given <6 hours sleep)

*May 28, 2016*

**Math**

If a room is 12ft by 16ft how many 12 inch by 12 inch tiles do I need to cover it

*May 16, 2016*

**physics**

a certain string vibrates in its fundamental frequency at 250 Hz. If the string is 15 cm long, what is the velocity of the wave in the string? What is the wavelength of the second harmonic frequency (the second wave which will fit into this length of string)?

*May 14, 2016*

**Math**

Carlos and Krystal are taking a road trip from Greenville to North Valley.Each has their own map,and the scales on their maps are different. A. On Carlos's map,Greenville and North Valley are 4.5 inches apart. The scale on his map is 1 inch = 20 miles. How far is ...

*April 19, 2016*

**Math**

I'm horrible at word problems but Create a chart that has the following information for each of the three selected carriers: cost per month, base number of minutes, additional cost per minute (overage) Using the information from the chart you created, write the total ...

*April 16, 2016*

**math**

Rewrite this formula using rational exponents. t = 2 pi sqrt 4/32 Thanks!!!

*April 14, 2016*

**Math**

I have a 24 gallon hot tub im filling it 5/8 with water how many gallons of water will be in hot tub??

*April 12, 2016*

**Math**

A scale drawing of the floor of a theater has a scale factor of 18. Mark says that he can use this information and any length on the scale drawing to find the corresponding length in the actual theater. He says that he can also use this information and any length in the actual...

*April 9, 2016*

**Science**

What is the mass of a box pushed both left and right at 50N?

*March 30, 2016*

**english**

tool burth book help

*March 30, 2016*

**Finance**

Universal Laser, Inc., just paid a dividend of $3.30 on its stock. The growth rate in dividends is expected to be a constant 6 percent per year, indefinitely. Investors require a return of 15 percent on the stock for the first three years, a rate of return of 13 percent for ...

*March 28, 2016*

**Math**

Cynthia is hanging a picture on the wall. The picture is 30 inches wide and 34 inches high and will be hung on a wall that is 10 feet high. The center of the picture must be 6 1/3 feet from the floor. Determine the distance from the ceiling to the top of the picture frame. ...

*March 27, 2016*

**mathematics**

Answer

*March 17, 2016*

**math**

Make a proportion out of it and cross multiply. so, 5/200=7/×. Cross multiply, you get 5x=1400, ×=280.

*March 13, 2016*

**Chemistry**

What is the mass needed to make 8.5L of a 4.0 M solutution of Na2SO4? (Na=23, s=32, O=16)

*March 13, 2016*

**Chemistry**

What chemical occurs to the red cabbage red for acids and blue for bases.

*March 9, 2016*

**spanish**

Ahora yo en Panamá.

*February 29, 2016*

**algebra word problem**

elsie, after spending one fifth of her allowance for candy and one half of what was left over for flowers had 72 cents remaining. How manu cente did she have at first? This needs to be one variable answer.

*February 24, 2016*

**math**

elsie, after spending one fifth of her allowance for candy and one half of what was left over for flowers had 72 cents remaining. How manu cente did she have at first?

*February 24, 2016*

**math**

two years ago a woman was 4 times as old as her daughter. three years from now the mother will be only threw times as old as her daughter. How old are each of them now?

*February 24, 2016*

**math**

a farmer sold 425 bushels of wheat and oats for $481.58. How many bushels of each did he sell, if he received $2.08 a bushel for the wheat and $.94 a bushel for the oats?

*February 24, 2016*

**math**

sum of two numbers is 40. the difference of 5 times the larger and 4 times the smaller exceeds 7 times the smaller by 8. Find the numbers

*February 24, 2016*

**Math**

John thanks for helping. Just to make sure, is the store's profit $53.27

*February 24, 2016*

**Math**

I need help please. The usual markup on shoes at Fast Times Department Store is 240%. During a 25%-off sale, the store sold a pair of shoes for $39.95. Estimate the amount of the store's profit on the shoes.

*February 24, 2016*

**Math**

Jason and Mary are married taxpayers in 2015. They are both under 65. For the tax year, they have a total of $41,000 in wages and $500 in interest income. Their deductions for adjusted gross income is $5,000 and their itemized deductions equal $7,950. They claim two exemptions...

*February 20, 2016*

**i need help with science pls**

Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of the visible light ...

*February 10, 2016*

**Math pls help me pls pls**

If the outliers are not included, what is the mean of the data set? 72, 82, 3, 55, 62, 73, 90, 80, 151, 59, 46, 31 59 65 67 73 is it b

*February 10, 2016*

**calculus**

The table below gives selected values for the function f(x). Use a trapezoidal estimation, with 6 trapezoids to approximate the value of . x 1 1.1 1.2 1.5 1.7 1.9 2.0 f(x) 1 3 4 6 7 8 10

*February 9, 2016*

**math**

If $60 is put in an account that gets 7% per year, and I add $15 at the end of each year, how much will I have at the end of 8 years?

*February 7, 2016*

**English**

To my Grade 11 students especially Fahad. I know you are looking at this page. To you other dumbass students who actually use this page...you probably waste more time reading this page than actually studying the meaning of Onomatopoeia.

*January 29, 2016*

**Math**

I am trying to help my child with this problem and I have no idea what to do to solve this word problem. Paul used 1 1/4 gallons of paint to cover 3/8 of the walls in his living room. How many gallons of paint will Paul need to paint all the walls in his living room?

*January 15, 2016*

**calculus**

Determine if the Mean Value Theorem for Integrals applies to the function f(x) = x^3 − 9x on the interval [−1, 1]. If so, find the x-coordinates of the point(s) guaranteed to exist by the theorem. Not quite sure how to do this one at all to be completely honest. ...

*January 1, 2016*

**Physic**

Obtaining an algebraic Equation for T (0.300)(4190J/(kg*K)(T-70.0*C) + (0.100)(390J)/(kg*K)(T-20.0*C) I don't know how to use the Algebraic Equation on that?

*December 20, 2015*

**multiplication**

10656

*December 14, 2015*

**calculus**

Let Y = 7x sin-1(2x)+^3 square root 1+4x2. Find Y'. I don't know how to do the square root part. I have done y'= (7x)' (Sin^-1(2x)) + (7x)(sin^-1)'+...... y'= 7 sin^-1 + (7x)sq(2x)'/square root (1-(2x))^2 + .....

*December 13, 2015*

**calculus**

Anti-Derivatives 2x^6-x^3/x^2

*December 11, 2015*

**Chemistry**

A 100.0-mL sample of air is collected at 21 degrees Celsius and 772 mm Hg. What is the volume of air at STP? I know that I have to change deg. Celsius to K and mm Hg to atm. I'm stuck on what formula I should use... Should I use PV=nRT?

*December 10, 2015*

**Physics**

A ball projected with an initial velocity u at an angle tita to the horizontal cover a horizontal range of 26m after 5sec. Cal. The value of u and tita? g=10ms-1

*November 4, 2015*

**Physics**

I'd say your right. lol

*October 29, 2015*

**math**

Danika has yellow 10 buttons.She has 6 times as many black buttons. How many buttons does she have?

*October 27, 2015*

**math**

larry has a board that is 4 yards long. How much needs to be sawn off to make the board 2 feet 8 inches long? A) 1 ft 4 in B)8 ft 6 in C) 2 ft 6 in D/9ft 4 in

*October 27, 2015*

**ELA HELP FAST**

thank you

*October 18, 2015*

**ELA HELP FAST**

I need help researching to find information about the questions

*October 18, 2015*

**ELA HELP FAST**

Why is baseball in all its forms – from T-ball to the major leagues – important to Americans of all ages? What traditions have grown around baseball, and how do they affect the people who play and love the game? How can knowing about the game of baseball, its history...

*October 18, 2015*

**Pre-Calculus**

Got it. Thanks Reiny. It's 75/sin.667 .40x60=.667 And that comes out to the 6445.5 I was looking for

*October 15, 2015*

**Pre-Calculus**

And therein lies the problem, the book says it's 6445.5 ft. or 1.2 miles... Oh dear, it's 40' not 40*

*October 15, 2015*

**Pre-Calculus**

The angle of depression from the top of a 75 ft. lighthouse to a ship out in the ocean is 40*. How far out is the ship from the lighthouse? I've been stuck on this problem for an hour, I know the answer but don't know how to set it up/enter it in a calculator.

*October 15, 2015*

**Physics**

Resolve a force of 23 N at 180 degrees and a force of 47 N at 270 degrees.

*October 14, 2015*

**Math**

Thank you

*October 12, 2015*

**Math**

Simplify the expression 9 + 10h + -5h = 0 Please show steps

*October 12, 2015*

**math**

a sum of money is shared between to persons at the ratio 2:5 one person received $60 how much was shared

*October 5, 2015*

**physics**

An extreme skier slides down an incline that forms an angle 24 degrees above the horizontal. The skier starts from rest and accelerates firmly at 4.00m/s^2 for a distance of 50.0m to the edge of a cliff. The cliff is 30.0m above the powdery snow below. Find how far from the ...

*September 30, 2015*

**Fire protection eng**

17 hours

*September 29, 2015*

**health**

Thanks lun got a 100%

*September 28, 2015*