# Posts by Justin

Total # Posts: 962

**Chemistry **

When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing

**Chem**

Thank you

**Chem**

When 20.0mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate, a precipitate Ca (IO3)2 is formed. Calculate the concentrations of both NO3- and IO3- before mixing and after mixing.

**Chemistry**

Thank you!

**spanish 3**

is it tender?

**spanish 3**

escribe la forma del verbo indicado en el tiempo indicado. yo / tener / future

**Math**

The original price for a pair of sneakers was $70. John bought them on sale for 25% off. The sales tax was 6%. How much did John pay for the sneakers, including sales tax? A $16.80 B $18.55 C $52.50 D $55.65

**LANGUAGE ARTS**

i said suits for men. So suits is dresses now i guess so

**LANGUAGE ARTS**

i have a research presentation essay and this what i need introduction, body, conclusion, and source of citation.

**LANGUAGE ARTS**

This is what i got so far "In a Christmas carol and Victorian period have the same clothing such as dresses for women and suits for men. While men and women wear dresses its more common to wear shorts and shirts"

**LANGUAGE ARTS**

Yes, I found out they wear long dresses with puffy skirts

**LANGUAGE ARTS **

The topic is asking to research clothing in the Victorian period and then relate it to a Christmas carol and compare to today. Please help?

**Math **

A typical around a track in the United States has a length of 440 yards. How many laps would need to be completed to run a mile

**Math**

1. Graph the points A ( -5,0) B ( -4, 3) and C ( 0, -4) A B C D 2. Identify the quadrant in which (3, -6) lies A II B IV C I D III 3. Determine which ordered pair is a solution of y = 2x - 3 A ( -2, 7) B ( 0, 3) C ( -4, -11 D ( 5, -7 5. Graph the linear equation y= 3x + 3 A B ...

**Science **

How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.

**Math**

We can't do your homework for you. Sorry.

**Science **

Explain what Maria and craters are and how they formed.

**Geometry**

I don't know how to post it so...

**Geometry **

Which of the following represents a chord but not a diameter of the circle? A. TR B. SN C. PM D. SM

**Algebra**

Barb is making a bead necklace. She strings 1 white bead, then 3 blue beads, then 1 white bead, and so on.Write the numbers for the first eight beads that are white.What is the rule for the pattern

**Geometry**

A 20 meter long cable is used to support a telephone pole, holding it perpendicular to the ground. If the cable forms a 60 degree angle with the ground, how high up the pole should the cable be attached?

**Math**

No. I am not sure if I am suppose to give you the answer but if you calculate the percentages than you can see the answer.

**Science**

You are pushing a friend on a sled. You push with a force of 20N. Your friend and the sled together have a mass of 60kg. Ignoring friction, what is the acceleration of your friend on the sled?

**Calculus III**

Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And set them up for the ...

**Calculus III**

Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And set them up for the ...

**language arts**

Could you check my answer please..thank you Which of the following sentences contain a linking verb? A. Teresa wore her favorite shoes today. B. Her shoes look really comfortable.xxx C. She put them on with striped socks. Teresa walked for hours without a complaint! thank you

**language arts**

Could you check my answer please..thank you Which of the following sentences contains a linking verb? A. Yesterday, Sarah experienced rock climbing for the first time.xxx B. Sarah seemed nervous at first. C. She climbed very well for a beginner. D. I think Sarah wants to go ...

**Calculus III**

Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And set them up for the ...

**Algebra**

I need help understanding how to cross-multiply addition of inverse functions. I'm given this, 1/p+1/(p-45) = 1/30 The answer goes to p^2-105p+1,350 = 0. My method has been adjusting the ratios of the numerator and denominators to give, [30(p-45)]/[30p(p-45)]+[30p]/[30p(p-...

**Ray Optics**

Hi, this is about thin film interference in ray optics. My book presents two similar problems, but somehow uses different paths for the same variable. I'll list out the given variables: --Problem A-- n1 < nf > n2, delta phase is therefore lambda over two. Film ...

**General Physics II**

Hi, this is about thin film interference in ray optics. My book presents two similar problems, but somehow uses different paths for the same variable. I'll list out the given variables: --Problem A-- n1 < nf > n2, delta phase is therefore lambda over two. Film ...

**6th grade math**

My question is: Between which two whole integers is -0.5. how do I explain this

**art**

Could you please check my answer please...thank you Which of the following is the best evaluation of the artwork based on the criterion that the piece feature imaginary creatures or things. 1. The artwork is successful because it features a fully clothed raven-headed winged ...

**math**

how many sets of 4 are there in sets of 24?

**Math**

Let (7,-3) be a point on the terminal side of theta. Find the exact values of sin of theta, csc of theta and cot of theta?

**Environmental Science please help**

Cheyenne is correct 100%

**Math**

If one hundredths is divided into ten equal parts, each part is one (BLANK )

**pre algebra**

2.5x10^-5 equals what?

**Math**

n/-3 + 5 > 4= Have to explain all of the steps...every time I do it I come out with a different answer. Please I am totally lost on this one...Thank you.

**art**

The math tessellations: unit 4 1. The architectural design was created by: 1. using an organic pattern in the form of tessellation. 2. using a geometric pattern in the form a tessellation. 3. using no definite pattern and placing shapes randomly. 4. using patterns that ...

**american goverment check answers**

its A bruh

**science**

Which of the following can be used to explain why fossils of the same kinds of organisms can be found in different regions of the world? biogeography adaptation continental drift dispersal I think it is dispersal..but not sure..thank you for your help.

**Biology 20**

I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a step that could be added to the procedure to isolate a specific compound for chemical testing.' What step could I use?

**Math**

You're given a fraction, 3/4-m. It's in your best interest to convert the whole number, 10-m, into a fraction. This can be thought of writing 10/1, and multiplying both the numerator, 10, and the denominator, 1, by 4. Once you have 10-m with the same denominator as 3/4...

**Organic Chemistry**

Oh you are right! One of my secbutyls had a different position for its branch. Thanks!

**Organic Chemistry**

Hi, I'm trying to fix an incorrect IUPAC name of a molecule. It is given as trisecbutylmethane, and I have to draw it out to correct it. Here's the thing: how do I draw incorrect IUPAC name? I can't wrap my mind around it. What I have drawn out is a tertiary carbon...

**Calculus III**

Topic: Quadric surfaces. I have two homework problems, and they are quite a doozy for me. So the point is, I am given details of a quadric surface on the Cartesian coordinate system, and thus have to use the data to construct an equation through it. ====================== Find...

**PHYSICS**

Ah, I initially thought you had too little information, but in fact this is theory (or should be). Depends, if you are neglecting dissipative forces like drag, this is quite easy. So in projectile motion (the arrow is a projectile), we like to separate our axes into their ...

**math**

Shalina uses the expression 3x to determine the cost of x notebooks. What is the cost of 24 notebooks?

**General Physics**

A 2.3 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x axis is applied to the block. The force is given by F with arrow(x) = (2.6 − x^2) N, where x is in meters and the initial position of the ...

**Physics**

Five masses are positioned as follow in the x and y axis: m1 = 1 kg at (0,0) m2 = 2 kg at (4,0) m3 = 3 kg at (4,5) m4 = 4 kg at (0, 5) m5 = 5 kg at (2, 2) All x and y values are in meters. Find the magnitude and direction of the net gravitational force experience by m3 due to ...

**Physics**

A 4.0-kg mass is placed at (3.0, 4.0) m, and a 6.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x-axis?

**General Physics**

Clarification: this is calculus-based physics, so the methodology is not restricted to trigonometry only. I have two questions, so hopefully I can divide them up nice and evenly. Also, if you know where I should copy and paste proper vector notation from, please tell me so I ...

**World History**

Who names himself dictator during the late Republic and early Empire?

**World History**

How did the Punic Wars effect the Roman Army?

**World History**

Oh ya I think it is B but I am not sure.

**World History**

1. What island did Rome gain control of as a result of the first Punic War? A: Sicily B: Corsica C: Mediterranean D: None of the above

**Math**

Find the first 4 terms in the expansion of ((3x^4)-(2/y^5))^9

**Science-Physics**

As shown below, a 2.00 kg mass is connected to an unknown mass m via a massless rope and a massless, frictionless pulley. The mass m is on a ramp angled 20 degrees above the horizontal. The coefficients of kinetic and static friction are μk=0.35 and μs=0.45, ...

**Pre Algebra (Math)**

A certain animal can go for a long period of time without drinking water. When it does drink, its body weight can increase by 40%. Suppose the animal weighs 80 pounds after a long period without water. How many pounds can the animal gain when it drinks?

**Physics**

A 4.00-kg block rests on a 30.0° incline. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline, given g= 9.80m/s^2?

**chemistry**

If the water in 500mL of 0.44M NaCl solution is evaporated, what mass of NaCl will remain?

**Calculus II**

So I'm trying to integrate a function using partial fractions. Here is the integral of interest: ∫(3x^2+5x+3)/[(x+2)(x^2+1)]dx. Since the numerator's degree of the polynomial is lesser than that of the denominator's degree, it is clear to separate. However, ...

**Calculus II**

Is it possible to rewrite as: ∑(-1)^n[x^(2n+3)]/(2n+1)!

**Calculus II**

So I have Maclaurin series for sinx = ∑(-1)^n[x^(2n+1)]/(2n+1)!. I need to write out new series for sin(x^2). This will be equivalent to squaring the whole Maclaurin series of sinx, right? I'm just confused as to what terms are squared, and thus what the final ...

**science**

the solubility of an unknown substance is 120 grams of water at 70 degrees celsius. What is it?

**chemistry**

What is the molarity of the following solutions? A. 0.96 g MgCl2 in 500 mL solution B. 9.33 g Na2S in 450 mL solution C. 2.48 g CaF2 in 375 mL solution

**chemistry**

When 23g of C8H18 is combusted at STP, how many liters of carbon dioxide is produced?

**Science /bio**

Any foods or fruits highest in glucose?

**Social studies**

Nationalism ?

**Art**

Sorry I didn't read the question right it's D,right?

**Art**

Correct me I read the link and It said that they have supreme power

**Art**

what idea did the halos on the heads of Pichore's main subjects emphasize A) plentiful wisdom •• B) Exceptional power C) Divine connection D) extraordinary creativity Correct me

**Chemistry**

Sorry for the post-script but I had to add spaces and the parentheses so the picture album will upload. If this is just too unconventional then I apologize.

**Chemistry**

Okay so I understand this is incredibly unconventional, but I have a big favor to ask. I just got a chem exam back and my teacher still has not posted my scantron score. I was wondering if it is at all possible for you guys to just spot-check for accuracy. It can be rough or ...

**Math**

Find two numbers which have a sum of 2 and a product of 2. This question is driving me crazy, please help!!

**math**

In which quadrant does the angle Θ lie given that Cos Θ > 0 and tan Θ > 0? A. Quadrant I B. Quadrant II C. Quadrant III D. Quadrant IV B?

**Chemistry**

A Sample of M2O3 weighing 11.205g is converted to 15.380g of MCL3, where M is the unknown metal, then what is the identity of M?

**math**

If sierra swims laps every morning for week . she swims 4/5 of a mile every morning. how many miles does she swim in one week Do i multiply or divide 5/1 x 4/5. please help

**Math**

A bag contains 3 blue marbles, 4 red marbles, and 2 white marbles. Three times you draw a marble and return it. Find the probability. P(all white)

**Computer Science**

Create a class called Shapes that has a private int field named radius and the proper get- and set- methods (according to our Java coding standards). Create a constructor that takes an integer as a parameter to initialize the radius. Create a void method called report() that ...

**Math**

There are 15 vegetables in the garden. they are planted in rows of 5. there are 2 carrot plants and 3 potato plants in each row. how many carrot plants are in the garden?

**math**

grantvilles governor receved 3 times as many votes as carys governor.carysgovernor received 790 votes. how many people voted altogether

**U.S. History**

what did Rousseau mean what he started that if any individual wants to pursue his own self-interests at the expense of the common good,"he well be forced o be free"? do you agree or disagree with Rousseau's Ideas

**stat**

While technology or a t-distribution Distribution Table can be used to find the area, in this problem, technology will be used. Find the P-value associated with t t0equals=1.34 and 19 degrees of freedom, rounding to three decimal places. Can ...

**Physics**

A 50 gram mass vibrates in SHM at the end of a spring. The amplitude of the motion is 0.12 meters, and the period is T= 1.70 seconds. Find: The maximum acceleration of the mass? The speed of the mass when the displacement is 0.06 meters?

**Humanities**

Having trouble answering these questions, about John Kani's film (Nothing but the Truth). 1. How does Mda see memory and identity as being linked? How is this reflected in Kani’s play? 2. How does the play mirror the intentions and role of the Truth and Reconciliation...

**Physics**

A steel bar has an initial length of 40 meters when the temperature is 20 oC. At what final temperature will the steel bar have a final length of 40.01 meters? The coefficient of linear expansion of steel is 12E-6 (1/C).

**Physics**

A 35-g block of ice at -14°C is dropped into a calorimeter (of negligible heat capacity) containing 400 g of water at 0°C. When the system reaches equilibrium, how much ice is left in the calorimeter? The specific heat of ice is 2090 J(kg K) and the latent heat of ...

**precalc**

Solve: round to the thousandths if necessary! 1) 4^3/4x+5 = 12 2) log(x-1) + log x = log 6 3) 2log(base 4) 5 - log(base 4) x + log(base 4) 3 - log(base 4) 7 = 1/2

**Calculus**

Use integration by parts to evaluate the definite integral. S 12 x/sqrt of x+4 dx 0

**physics**

The potential energy of a pair of hydrogen atoms separated by a large distance x is given by U(x)=-C(subscript)6/x^6, where C_6 is a positive constant. What is the force that one atom exerts on the other? Is this force attractive or repulse? I've taken the derivative of ...

**Chemistry**

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...

**Chemistry**

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...

**Chemistry**

Enthalpy I'm given that the heat of reaction for the combustion of ethane is -1560kJ/mol. I need to figure out how much heat is produced from 18g of ethane. 2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O Okay so I'm rough on Thermo right now, so I gave it my best shot. Could we ...

**Calculus 1**

Locate the absolute extrema of the function f(x)=Sinpix on the closed interval [1,1/3]

**Calculus**

Evaluate ∫ (cos(x))^(1/2)sin(x)dx Let u = cos(x)? ∫ (u)^(1/2)sin(x)dx = ∫ [2u^(3/2)/3]sin(x)dx ∫ [2cos(x)^(3/2)/3] (-cos(x)) dx? I thought this involved the FTC, but now I'm thinking that's false.

**Calculus**

Alright, I want to see if I understand the language of these two problems and their solutions. It asks: If F(x) = [given integrand], find the derivative F'(x). So is F(x) just our function, and F'(x) our antiderivative? 1) F(x) = ∫(2, x) [t^(3)+1]^(1/2)dt Let u...

**Calculus**

Use a Riemann sum with n = 3 terms and the right endpoint rule to approx. ∫(1, 2) sin(1/x)dx. My teacher just needs the terms written out, no need to add or multiply. This is a problem she did up on the board, so here's her answer: sin(4/3)(1/3) + sin(5/3)(1/3) + sin...

**maths**

If you reduce one side by the same amount of what you increase on another side, the differences should cancel out. Thus the perimeter should stay the same, easily leaving 48(Perimeter of your rectangle AND square) to be divided by 4 (sides of a square).