# Posts by carl

Total # Posts: 296

**Chemistry**

1 mole of carbon tetrachloride is 154 grams. Divide the sample by the molar mass to get the number of moles. It should be about 0.292 moles

**word problem**

The length of a rectangle should be 9 meters longer than 4 times the width. If the length must be between 49 and 85 meters long, what are the restrictions for the width, w? asking for _____< or<= w <= or <______

**math**

arctan(y)=x+c To solve for y, would it just be: y=tan(x+c)?

**Physics**

The kinetic friction force between a 60kg object and a horizontal surface is 50N. If the initial speed of the object is 25m/s, what distance will it slide before coming to a stop?

**Physics**

In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given "v"s are the ...

**Math**

Tom leaves the outskirts of City A at 8 am and travels north to City B at a constant speed of 80 km/h. Cindy leaves from the same place at 8:30 am and takes the same route traveling at a constant speed of 100 km/h. At what time will Cindy overtake Tom along the road to City B?

**Math**

Tom leaves the outskirts of City A at 8 am and travels north to City B at a constant speed of 80 km/h. Cindy leaves from the same place at 8:30 am and takes the same route traveling at a constant speed of 100 km/h. At what time will Cindy overtake Tom along the road to Sydney?

**Math**

Thanks!!!

**Math**

This helps SO much! Thank you!!

**Math**

What function should be used to maximize the volume of an open box that has a surface area of 24 and has a square bottom? Not sure how to do this, a step by step answer would be great. Thanks!!

**Math**

Write the ratio as a fraction in lowest terms. 1 1/3 to 1 3/4

**Math**

A flag has a length of 3 1/3 feet when the width is 1 5/6 feet. Write the ratio of the length to the width as a fraction in simplest form.

**Algebra**

The Pi (π) Club at Math High School was planning a fundraiser to sell pepperoni pizza. A pizza company donated enough ingredients to make the equivalent of 300 extra large pepperoni pizzas (16” diameter). In trying to determine the number of pizzas of each size to ...

**Algebra**

The Pi (π) Club at Math High School was planning a fundraiser to sell pepperoni pizza. A pizza company donated enough ingredients to make the equivalent of 300 extra large pepperoni pizzas (16” diameter). In trying to determine the number of pizzas of each size to ...

**math**

Marie is using a rectangular box to ship a framed painting to a friend. The box is 20 inches wide, 24 inches long and 6 inches deep. What is the surface area of the box?

**Algebra**

Randall wants to mix 57 lbs of nuts worth $1 per lb with some nuts worth $6 per lb to make a mixture worth $5 per lb. how many lbs of $6 nuts must he use?

**Math/precal**

How do i solve y=7b^x to find the y and x intercept?

**Math**

I don't know what to do with the b in there

**Math**

How do i find x and y intercepts of y=7b^x

**Math**

How do i solve 36^5x= (6^x)(6^x-2)

**Math**

the answer is p=24t

**Physics**

A man is swinging his child, Wii weighs 28.5 kilograms, in horizontal circle which has a radius of 0.75 meters and it takes the child 1.75 seconds to make one revolution. a) What is the magnitude and direction of the force the man exerts on his child? b) What is the magnitude ...

**Math**

Tameron made a recipe that called 1/4 teaspoon of salt. If the recipe is doubled, how much salt is needed?

**Math**

Michaela walked 2/5 mile to the store in 1/4 hour. What is the walking pace?

**Math**

The baker ordered 4 dozen eggs at the beginning of the week. By Friday the baker used 5/12 of the eggs. How many eggs did the baker have left

**Essex**

An investment club placed $33,000 into two simple interest accounts. On one account, the annual simple interest rate is 6.5%. On the other, the annual simple interest rate is 4.5%. How much should be invested in each account so that both accounts earn the same annual interest?

**Algebra**

We came up with the following example: 24+[5(z)] ---------- x-2-y 24+10=34 ---------- 4-2=2 2-1=1 x=34 This would be for a 4 year old med. size dog. In other words... 24+10=34 ----------- 1 34/1=34 x=34 Not sure if that's the proper way to write the equation but I'd ...

**trigo**

A plane in calm weather flies east at 20 K.P.H. A 45 K.P.H wind blows from the north. Find the direction and speed required to keep the plane in it's original course and speed.

**calculus**

You have been hired by a farmer to design a fenced-in rectangular enclosure for emus. The emus will require 720 square feet of area in which to roam, and the fence will cost 20 dollars per foot. The rectangular area will adjoin an existing wall, so a fence is only needed on ...

**Batteries**

3 Sn^2+ (aq) + 2 Al (s) <--> 2 Al3+(aq) + 3 Sn(s). What is the voltage for this cell? What is the voltage for the cell if the Sn2+(aq) is [.15] and Al3+(aq) is [1.80]? Using proper line notation, describe the cell described in the question.

**Match**

Simplify: 9/40 divided by 1/5 times 3/8

**English**

Thanks for not helping

**English**

individualism I'm always right.

**English**

Which of the following was valued during the Romantic period? logic individualism balance restraint

**Chemistry**

What would be the new temperature in Celsius of a sample of methane if 205 ml at 725 torr and 75.0 degrees C is allowed to change to 907 ml and 827 torr? I used P1V1/T1=P2V2/T2 Plugged in the numbers (205)(725)/(348.15K)=(907)(827)/T2 When I solved for T2 I got 1.757*10^3, and...

**math**

i am a 5 digit number greater than 60,000 but less than 70,000 my ones digit 1 less than my 10,000 digit all my other digits are the same the sum of my digit are 23. What is my number?

**Chemistry**

How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?

**Chemistry**

How much water must be added to make 500 ml of 12.0 M HCl to 1.0 M HCl (500mL• 12M) / 1.0M =6000m Is this correct?

**Math**

Thanks!

**Math**

Can someone please explain to me how to solve this: Simplify 6P2. A) 30 B) 15 C) 12 D) 720

**chemistry**

ΔG= (2x53 + -114) - (2x162)= -332 K=e^(-332/(.008314x298)= 6.36 e-59 I have also tried using 8.314 as the value for R

**chemistry**

The power of the equation ΔG° = –RT ln(K) is that K can be determined from tabulated values of ΔG°f. Use the tabulated values of the Gibb's energy to determine K for the reaction, 2AB(l) ↔ 2A(g) + B2(g), at 298K. (R=8.314 J/K mol or R=0.008314 ...

**Chemistry**

A pH = 7.6 buffer is needed in the lab. This buffer is made by first dissolving 17.42 g K2HPO4 in 600 mL of water. What is the pH of this salt solution? This solution of course will be too basic becuase we only have the base of the buffer present. What must the value of the ...

**Chemistry**

Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M NaOCl(aq) with 0.3 M HBr At 0.00 mL of HBr: At 70 mL of HBr: At 100 mL HBr: At 120 mL of HBr

**Chemistry**

Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M HCN(aq) with 0.2 M NaOH At 0.00 mL of NaOH At 85 mL of NaOH. At 150 mL NaOH. At 160 mL of NaOH

**Chemistry**

What is the pH of a 150 mL buffer solution containing 0.5 M NaH2PO4 with 0.5 M K2HPO4? Determine the new pH of the solution upon the addition of 10 mL of 1.2 M strong acid to the 150 mL buffer solution above.

**Chemistry**

what is the pH of a solution created by adding 15.5 g of KClO to 228 mL of 1.08 M HClO(aq).?

**Algebra**

Factor: -3x^2 - 18x + 15

**SPANISH**

Thank you so much :)

**SPANISH**

Thankyou

**SPANISH**

This question tells us to answer if the children bahaved good or bad from the paragraph below. Todos los niños le regalaron a Ana muchas cosas fantásticas. Había muñecas, juguetes, animales de peluche … y más cosas. Susana le regal&...

**Analytic Geometry**

Find the bisectors of the interior angles of the triangle whose sides are the line 7x+y-7=0, x+y+1=0 and x+7y-4=0.

**Middle School Math**

My home work problem is 3g+5=17 my answer is -20. A I correct.

**math**

a variable y varies directly as the square root of a varies x,and equals 6 when x=4 find y when x=25

**Physics**

A glass block has a refractive index of 1.49. What is the critical angle for the block?

**Precalculus (Telescoping Series)**

Evaluate 3/(1! +2! +3!) + 4/(2! +3! +4!) + 5/(3! +4! +5!) + ... + 2001/(1991! +2000! +2001!).

**Chemistry**

1100

**Physics**

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some time later, object A is...

**Physics**

Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I use dot product here?)

**math**

the width of a rectangle is 4cm and the length is 8 cm if both the width and the length are increased by equal measures, the area of the rectangle is increased by 64 cm 2. find the length and width of the larger rectangle

**College Algebra**

Solve for x in terms of the other symbols: rsx^2 + s^2 x + rtx + st = 0

**Geometry**

A swimming pool is to be constructed in the space of partially overlapping identical circles. Each of the circles has a radius of 9 m, and each passes through the center of the other. Find the area of the swimming pool.

**Math**

A cube has a surface area of 24 ft2. What is the length of one edge of the cube? Show Work Please.

**English II B**

Ok thanks.

**English II B**

It don't say, but are you saying it's 4.

**English II B**

I think its either 2 or 1.

**English II B**

A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing the topic Need help ...

**English II B**

Thanks, but me and mike are brothers we are working on the same paper.

**English II B**

What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

**English II B**

Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading 2.an anthology 3.a poetry contest 4.a school newspaper

**math algebra**

a square parking lot has a surface area of (w^4-2w^2x+x^2) square feet. Factor this trinomial to find the length of one side in feet.

**CALCULUS ECONOMICS**

How did you get to that number?I have 5000 (wrong solution) and I can't figure out q7 because i don't know the right value for q.opt (q.eq=625?)

**Math**

Jared's football team lost a total of 12 yards during 4 plays of the game. They lost the same number of yards during each of the plays. What is an integer that can represent the number of yards lost during each play?

**Physics**

A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...

**Chemistry**

120.0g of ice is melted, how much energy is absorbed?

**programming logic**

The No Interest Credit Company provides zero-interest loans to customers. (It makes a profi t by selling advertising space in its monthly statements and selling its customer lists.) Design an application that gets customer account data that includes an account number, customer...

**physics-can anyone solve this please**

3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...

**magnetism help**

A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...

**Physics electric potential energy difference**

A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?

**Physics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?

**Phyics**

Three moles of an ideal monatomic gas are at a temperature of 396 K. Then 2438 J of heat is added to the gas, and 897 J of work is done on it. What is the final temperature of the gas?

**Physics**

A container holds 1.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 6.6x10-3 kg bullet with a speed of 670 m/s. What is the Kelvin temperature of the gas?

**math**

2(w+18+W)=2(w+18−6+w+3) perimeter is 126 my teacher ask to get the value of W

**math**

2(w+18+W)=2(w+18−6+w+3) perimeter is 126 whats w = to?

**algebra**

2(w+18+W)=2(w+18−6+w+3)

**ENGLISH**

Book april morning Describe both sides of the Boiled pudding controversy in town. What does this reveal about the town?

**engineering**

What is the change in enthalpy for an isothermal, isentropic compression of an ideal gas from 2 atm to 12 atm?

**chemistry**

What is the change in enthalpy for an isothermal, isentropic compression of an ideal gas from 2 atm to 12 atm?

**History**

How did American debates about foreign policy in the 1790s reflect the beliefs of the political parties? i think it tells poltical parties what to change ,but i need more info.

**Us history**

Define unicameral legislature and bicameral legislature. Which type of legislature did must states have? I cant find what type of legislature did the states have

**us history**

why did madison believe that faction would not be good

**math**

in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

**math**

The average of 20,70 and x is 40. If the average of 20,70, x and y is 50, then y= a. 30 b. 60 c. 70 d. 80 e. 100

**us history**

Should the United States take action in Syria, why or why not? I believe that the us shouldnt because the us

**math**

1.4

**Statistics**

Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.34, P(B) = 0.41, P(A | B) = 0.2

**Math**

If you can write 5 pages each hour, at that rate, how many min. would it take you to write 2?

**Calculus (math)**

A) 12,000 ft lb B) 9,600 ft lb C) 2,690 ft lb D) 14,500 ft lb

**Calculus (math)**

A rescue cable attached to a helicopter weighs 2 lb/ft. A 190 lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done by lifting the man if the helicopter is 50 ft above to water.

**Statistics**

how can I decide to reject or fail to reject the following null hypothesis? let a= 0.05,data; p=0.69, n=32, test statistic z= 0.09095 H(0);p=0.68 H(1)p>0.68