# Posts by Jason

Total # Posts: 1,335

**Chemistry**

Calculate ?G° for each of the reactions below in kJ. (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq)

**math**

A recipe for cookies calls for 4 cups of flour, half as much sugar as flour, and half as much butter as sugar. How many cups of butter will you need if you double the recipe? (Hint: Half of an amount is the same as dividing the amount by 2)

**Chemistry**

Aluminum is produced by the electrolysis of aluminum oxide (Al2O3, bauxite ore) dissolved in molten cryolyte (Na2AlF6). Calculate the mass of aluminum that can be produced in one day in an electrolytic cell operating continuously at 1.0 x 105 amps. The cryolite does not react

**Social Studies**

first of all, writeacher is right, no one on here should be cheating, if you need answers that badly, look at a text book, once the end of the year test rolls around, you will fail, and they look at your scores, if you ask a question, someone may help, but what you have done, ...

**HELP**

what is an equation in slope intercept for. for the line that passes through the points 1,-3 and 3,1 y=3x+1 ** y=x-3 y=2x+5 y=2x-5 For the equation -4y=8x what is the constant of variation? -4 -2 ** 1 2 Are they right

**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.

**integral calculus**

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

**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.

**Language Arts (ASAP)**

Thanks @Writeacher

**Language Arts (ASAP)**

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

**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 ...

**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?

**physics**

the angular speed of the hour hand of a clock is

**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?

**physics**

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

**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

**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...

**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!

**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!

**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?

**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 ...

**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.

**Math**

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

**Math**

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

**Math**

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

**Math**

What about other pairs?

**Math**

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

**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...

**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 ...

**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

**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.

**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)

**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

**Statistics**

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

**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?

**Math**

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

**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 ...

**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.

**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

**Algebra**

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

**Trig**

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

**spanish**

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

**math**

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

**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?

**St.Vincent math**

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

**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 ...

**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

**Math**

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

**mat**

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

**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

**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)

**Math**

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

**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)?

**math (pLZ HELP ASAP)**

30 miles

**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 ...

**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 ...

**math**

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

**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??

**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...

**Science**

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

**english**

tool burth book help

**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 ...

**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. ...

**mathematics**

Answer

**math**

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

**Chemistry**

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

**Chemistry**

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

**spanish**

Ahora yo en Panamá.

**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.

**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?

**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?

**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?

**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

**Math**

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

**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.

**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...

**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 ...

**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

**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

**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?

**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.

**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?

**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. ...

**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?

**Math**

2/6

**multiplication**

10656

**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 + .....

**calculus**

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

**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?

**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

**Physics**

I'd say your right. lol

**math**

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

**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

**ELA HELP FAST**

thank you

**ELA HELP FAST**

I need help researching to find information about the questions

**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...

**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

**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*

**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.

**Physics**

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