# Posts by Angela

Total # Posts: 1,678

**Chemistry**

At constant volume, the heat combustion of a particular compound is -3447.0 KJ/mol. When 1.205 g of this compound (molar mass = 119.94 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 5.007 degrees C. What is the heat...

*December 9, 2012*

**Chemistry**

Consider the molecular level representation of a gas There are: (a picture) 6 blue dots 5 orange dots 3 green dots (i think they are the diatomic one, because it is pairs) If the partial pressure of the diatomic gas is .750, what is the total temperature? I am totally lost, ...

*December 9, 2012*

**Statistics**

Z= x-u/o So, 296-300/3 = -.77 Look at a standard normal distribution table .2794 is the value from the table. If you draw the curve, you will know that the area is to the left. So, you subtract: .5000- .2794 =.2206 is the probability. I am not sure about the second part.

*December 9, 2012*

**Chemistry**

If the heat from burning 6.000 g of C6H6 2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ is added to 5691 g of water at 21 °C, what is the final temperature of the water? Please tell me what I am doing wrong: 293,551= 5691*4.2*(Tf-21C) 293551= 23902.2Tf - 50946.2 ...

*December 9, 2012*

**grammar**

What is the simple subject in this sentence Who cares if she's in 3rd grade and I'm just in 1st.

*December 6, 2012*

**statistics**

Give and interpret the 95% confidence interval for the hours of sleep a student gets. (7,8,4,5,8,10,7,8,5,6,7,4,7,8,9,8,7,6,7,8)

*December 5, 2012*

**Algebra**

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 172 and a variance of 9. The material is considered defective if the breaking strength is less than 163 pounds. What is the probability that a single, randomly selected piece ...

*December 3, 2012*

**Math**

What is the value of n in the equation (2/3)n =(4/9)

*December 2, 2012*

**computers**

what part of a presentation slowws you to add charecter data?

*November 30, 2012*

**math**

how do you divide 1.0 divided by 0.02

*November 27, 2012*

**math**

26997.18 = PV(1.10)^10 26997.18/(1.10)^10 = PV 26997.18/2.59374 = PV 10408.59 =PV

*November 27, 2012*

**math**

(1+r)^365 =(1.07) 1+r = 1.07^1/365 1+r =1.00018538 r = 0.0018538 r = .185% daily (1+r)^12 = 1.06 1+r = (1.06)^1/12 1+r = 1.004867551 r = 0.004867551 r = .486% monthly

*November 27, 2012*

**Math**

(1+r)^12 = 1.03 1+r = (1.03)^1/12 1+r = 1.00246627 r = 0.00246627 r % = .247 % monthly

*November 23, 2012*

**Physics**

A roller-coaster car speeds down a hill past point A where R1 = 10.4 m and then rolls up a hill past point B where R2 = 15.6 m, as shown below. R1 and 2 are radii (a) The car has a speed of 21.0 m/s at point A. if the track exerts a normal force on the car of 2.05 multiplied ...

*November 1, 2012*

**English**

How can I make this sentence better for my objective on my resume. To obtain an administrative assistant position where my professional skills will be used to the fullest.

*October 31, 2012*

**Physics**

A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.

*October 24, 2012*

**Physics**

A 750 N student stands in the middle of a frozen pond having a radius of 5.4 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 2.0 kg physics textbook horizontally toward the north ...

*October 24, 2012*

**Physics**

A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.

*October 24, 2012*

**texas southern university**

A quantity of gas in a piston cylinder has a volume of 0.544 m3 and a pressure of 200 Pa. The piston compresses the gas to 0.126 m3 in an isothermal (constant-temperature) process. What is the final pressure of the gas? ??__Pa

*October 24, 2012*

**texas southern university**

A periodic wave has a frequency of 8.9 Hz. What is the wave period? ??__s

*October 24, 2012*

**Physics**

A railroad car with a mass of 1.86 104 kg moving at 2.80 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.40 m/s. (a) What is the speed of the three joined cars after the ...

*October 22, 2012*

**Physics**

oh nvm

*October 22, 2012*

**Physics**

are you sure the 0.138 shouldn't be .0138?? and the answer be 1.7e-6??

*October 22, 2012*

**Physics**

A 5.9 g coin sliding to the right at 27.6 cm/s makes an elastic head-on collision with a 17.7 g coin that is initially at rest. After the collision, the 5.9 g coin moves to the left at 13.8 cm/s. (a) Find the final velocity of the other coin. (b) Find the amount of kinetic ...

*October 22, 2012*

**Physics**

Thanks Elena!! CASEY, you da finest.

*October 22, 2012*

**Physics**

A 1.08 kg skateboard is coasting along the pavement at a speed of 4.60 m/s when a 1.19 kg cat drops from a tree vertically downward onto the skateboard. What is the speed of the skateboard-cat combination?

*October 22, 2012*

**French 2**

Which is an example of a superlative sentence? Answer Le français est fantastique. Le français est plus fantastique que l'anglais. Le français est la plus fantastique de tous les langues.

*October 21, 2012*

**Physics**

A 0.17 kg baseball moving at +20.80 m/s is slowed to a stop by a catcher who exerts a constant force of -376 N. How long does it take this force to stop the ball? How far does the ball travel before stopping?

*October 18, 2012*

**statistics**

random sample of n = 16 scores is selected from a normal distribution with a mean of μ = 50 and standard deviation of σ = 10. a. what is the probability that the sample mean will have a value between 45 and 55? b. what is the probability that the sample mean will ...

*October 15, 2012*

**Physics**

Those were all wrong, I don't get it.

*October 14, 2012*

**Physics**

A ball of mass 522 g starts at rest and slides down a frictionless track, as shown below. It leaves the track horizontally, striking the ground a distance x = 0.81 m from the end of the track after falling a vertical distance h2 = 1.03 m from the end of the track. (a) At what...

*October 14, 2012*

**Physics**

Thank you!!

*October 14, 2012*

**Physics**

Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop. (a) Determine the suitcase's speed at the bottom of the ramp. (b) ...

*October 14, 2012*

**Physics**

A skier of mass 74.5 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 55 m up a 31° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?

*October 14, 2012*

**Physics**

A 0.230 kg block on a vertical spring with spring constant of 4.25e3 N/m is pushed downward, compressing the spring 0.048 m. When released, the block leaves the spring and travels upward vertically. How high does it rise above the point of release?

*October 14, 2012*

**Econ**

Just a suggestion: Since there is a price floor on wheat (meaning that wheat cannot be sold under a certain price), wheat would be more expensive. In turn the people who make Healthy Wheat Cookies would produce less and would raise the price of Healthy Wheat Cookies, to make ...

*October 13, 2012*

**random math queastion**

√x^2+2 Is this possible as is?

*October 13, 2012*

**Physics**

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

*October 11, 2012*

**Physics**

Nevermind!! I got it! Thank you so much

*October 11, 2012*

**Physics**

I got 571, but it says it's wrong!!

*October 11, 2012*

**Physics**

An 52.0 N box of clothes is pulled 7.3 m up a 30.0° ramp by a force of 103 N that points along the ramp. If the coefficient of kinetic friction between the box and the ramp is 0.22, calculate the change in the box's kinetic energy.

*October 11, 2012*

**Calculus**

when I plug in the ordered pair (.25, 2)I get a zero in the denominator, was I doing that wrong?

*October 8, 2012*

**Calculus**

arcsinxy = 2/3 arctan4x find dy/dx at the point (1/4, 2)

*October 8, 2012*

**math**

name a possible set of scores for 15 students that would result in an average of 66%

*October 7, 2012*

**colleGe math**

y=-2|x| actually I'm sorry I left some of the details out. It says to let x=-3,-2,-1,0,1,2 and 3. Not sure what to make of this..

*September 29, 2012*

**colleGe math**

y=-2|-3| was the intended equation

*September 29, 2012*

**colleGe math**

y=-2|x| Will someone please explain how I'm supposed to graph this?

*September 29, 2012*

**collEge math**

x^3-27

*September 29, 2012*

**colLege math**

(2x-1)(x^2-4x+3)

*September 29, 2012*

**coLlege math**

√6x * √3x^2

*September 29, 2012*

**coLlege math**

It is done like this. :√6x

*September 29, 2012*

**coLlege math**

√6x*√3x^2

*September 29, 2012*

**cOllege math**

Any chance for help on this?

*September 29, 2012*

**cOllege math**

14x^2+5-[7(x^2-2)+4]

*September 29, 2012*

**College math**

(-30a^14b^8/10a^17b^-2)totally lost on me??

*September 29, 2012*

**7th grade socal studies**

I need help in 8. Please help. the question itself is worth 50 points. Yeah it sounds crazy but it is my mid term exam which is 25 or 50 points each but is worth only 300 points.

*September 26, 2012*

**Statistics**

AJ DAVIS is a department store chain, which has many credit customers and wants to find out more information about these customers. A sample of 50 credit customers is selected with data collected on the following five variables: LOCATION (Rural, Urban, Suburban) INCOME (in $1,...

*September 16, 2012*

**finance**

Knight has a property tax base with an appraised value consisting of $142,000,000 of taxable real property and $78,000,000 of taxable personal property. The assessment ratio is 50%. Exemptions for the elderly reduce assessed value by $3,000,000. The city has a planned budget ...

*September 9, 2012*

**Physics**

40 miles per hour

*September 6, 2012*

**Finance**

Mr. Brown is in the 10% federal income tax bracket and wants to invest $8,000 in interest-earning assets. Mr. Black is in the 35% bracket and wants to invest $15,000. The current rate on a typical high-quality tax-exempt municipal bond is 5% and on a similar quality corporate ...

*September 2, 2012*

**math**

Can you write it in a sentence

*August 14, 2012*

**math**

Would this be a arithmetic sequence

*August 14, 2012*

**math**

how do you put it in a sequence

*August 14, 2012*

**math**

What is x?

*August 14, 2012*

**math**

a new automobile depreciated 20% of its value after 1 year. if the automobile is priced at $18,000 after 1 year, what was its cost when it was new?

*August 14, 2012*

**ap government**

what is confederation ?

*August 11, 2012*

**Chemistry**

Complete the following chemical reaction. Label any precipitate that forms. KCl(aq) + AgNO3 (aq) ¨KNO3 (aq)+AgCl(s)

*August 7, 2012*

**geometry**

One thousand raffle tickets are sold for 4.00 each. one grand prize of $800 and two consolation prizes of $ 100 each will be awarded. Jeremy purchases one ticket. Find his expected value.

*July 24, 2012*

**geometry**

The National Association for Women in Scienc asked recent high school grads if they had taken certain classes. of those surveyed, 95 said they had taken physics, 108 said they had taken chemistry and 12 said they had taken both. nine said they had taken neither. How many ...

*July 23, 2012*

**gemetry**

An identification code is to consist of two letters followed by six digits. How many different codes if repetition is permitted.

*July 18, 2012*

**geometry**

If the probability of seeing moose in a day in a certain region of Alaska is 0.74, what is the probability of not seeing any moose in a day there?

*July 16, 2012*

**geometry**

Write the compound statement in symbols Let r= The food is good p= I eat too much q= I'll exercise If the food is not good, I won't eat too much.

*July 11, 2012*

**geometry**

Write the compound statement in symbols Let r= The food is good p= I eat too much q= I'll exercise If the food is not good, I won't eat too much.

*July 11, 2012*

**geometry**

Determine which if any of the three statements are equivalent. Give a reason for your conclusion. 1) If the house is not white,then the house is not small. 2) If house is not white and the house is not small 3)It is false that the house is white or that the house is not small.

*July 11, 2012*

**geometry**

construct a truth table for (~p^q)__> p

*July 8, 2012*

**geometry**

Construct a truth table for (qvp)__> ~q

*July 8, 2012*

**geometry**

Construct a truth table for (~PVq)___> q

*July 6, 2012*

**geometry**

construct a truth table for p_____> ~q

*July 6, 2012*

**geometry**

Construct a truth table for (~pvq) ____>

*July 5, 2012*

**geometry**

Construct a truth table for p----> ~q

*July 5, 2012*

**GEOMETRY**

Determine AU (CUB) start by finding C' and B' then find CUB

*July 2, 2012*

**GEOMETRY**

Given u= (22,23,24,25,26,27,28,29,30,31,32) A= 22,24,26,28,30) and b = (23,24,25,28,29) FInd AUB. Do not skip the answer. show your work finding A then B then find their union.

*July 2, 2012*

**Physics**

A Spanish galleon is about to be boarded by bloodthirsty pirates in the shallows of a Caribbean island. To save a box of treasure on board, the captain orders his crew to secretly toss the box overboard, planning to come back for it later. The rectangular box is waterproof and...

*June 29, 2012*

**geometry**

Determine the following AU(CUB)start by finding C and B then find CUB.

*June 29, 2012*

**geometry**

Given these sets a=(3,4,5,6,7) b=(6,7,8,9) c= (2,4,6,8) List the elements of this set CN (AUB)

*June 29, 2012*

**geometry**

start by finding C and B then find CUB

*June 27, 2012*

**geometry**

Determine the following AU(CUB)

*June 27, 2012*

**geometry**

THE FOLLOWING ANGLES ARE COMPLEMENTARY ANGLES. DETERMINE THE MEASURES OF ANGLE 1 AND ANGLE 2. X= ANGLE 1 3x+10= ANGLE 2

*June 27, 2012*

**geometry**

FIND THE PERIMETER AND AREA OF A RIGHT IF THE SHORTEST SIDE IS 20MM. AND THE LONGEST SIDE IS 52MM. INCLUDE CORRECT UNITS WITH EACH PART OF YOUR SOLUTION.

*June 27, 2012*

**geometry**

What is the exact area of a circle with a diameter of 25 inches?

*June 27, 2012*

**geometry**

DEF and ABC are complementary angles and ABC is nine times as large as DEF. Determine the measure of each angle.

*June 27, 2012*

**geometry**

The supplementary angles are supplementary angles. Determine the measures of angle 1 and angle 2. angle 2=x angle 1 = 5x+6 This is what i came up with. <1+<2=180 I subtracted 6 from both sides.Divided by 5 and i came up with 34.8 degrees. < 1 = 5x+6 5(34.8)+6 180 ...

*June 24, 2012*

**geometry**

Determine the volume of the figure. The base of the pyramid is the triangle and we don't know it's height I need to find it first. solve for h The numbers are 5ft and 7ft on top and 6ft and 5ft on bottom. I have no idea how to do this one can someone please help.

*June 24, 2012*

**geometry**

Given the graph below,create a grouped frequency distribution. Amount per adult movie ticket. Los Angeles 12, New Orleans 9, Atlanta 7and a half, New York 12, Tokyo 20, Paris 17, Munich 15. I don't know how to post the graph but these are the shaded areas.

*June 20, 2012*

**geometry**

Given the graph below,create a grouped frequency distribution. Amount per adult movie ticket. Los Angeles 12, New Orleans 9, Atlanta 7and a half, New York 12, Tokyo 20, Paris 17, Munich 15. I don't know how to post the graph but these are the shaded areas.

*June 20, 2012*

**geometry**

The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hours periods. Below is the sample 71 86 63 46 70 63 49 63 81 71 63 59 45 63 70 64 Construct a stem and leaf plot of the data.

*June 19, 2012*

**geometry**

What is the exact circumference of a circle with a diameter of 15 inches.

*June 19, 2012*

**geometry**

write the statement in symbols using the p and q given below. Then construct a truth table for the symbolic statement and select the best match. p= The mouse is in the house q= The cat is hungry.

*June 17, 2012*

**geometry**

In how many different ways can the top eight new indie bands be ranked on a top eight list? The top hit song for each of the eight bands will compete to receive monetary awards of $1000,$500,$250,and $100,respectively. In how many ways can the awards be given out.

*June 15, 2012*