Friday

February 12, 2016
Total # Posts: 169

**Chemistry**

I'm supposed to estimate the ΔH for O || H2C=CH2 +O3(g)--- CH3CH(g) + O2(g) and i got [4(432)+(614)+(1072)]-[3(413)+(347)+(745)+(358)+(467)] the answer i got was 182 but the answer was wrong and i'm not sure what i did wrong.
*December 1, 2015*

**algebra**

Speed cell wireless offers a plan of $40 for the first 400 minutes and an additional 0.50 for every minute over 400. Let t represent the total talk time in minutes. Write a piecewise -defined function to represent the cost C(T)
*December 1, 2015*

**business mathematics**

the maturity value of a $20,000, 7%, 75-day interest-bearing note dated september 10 is?
*October 9, 2015*

**fundamentals math**

I cant use that table when Im taking a test or exam I would need to know the steps since its a online class?
*September 27, 2015*

**fundamentals math**

hard*
*September 27, 2015*

**fundamentals math**

A standard math test was given to 6000 students. The scores were normally distributed with a mean of 420 and a standard deviation of 40. If george scored 340, how many students scored more than George? This is hrd because I tried using calculator but thats not the help i need...
*September 27, 2015*

**Chemistry **

How would you know if AgNO3 + Al(NO3)2 forms a precipitate?
*September 24, 2015*

**Math**

he annual precipitation for one city is normally distributed with a mean of 399 inches and a standard deviation of 3.3 inches. In what percentage of years is precipitation in the city between 392.4 inches and 405.6 inches? Hard help?
*September 20, 2015*

**Math**

The systolic blood pressures of a group of 18-year-old women are normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of women in this group have a systolic blood pressure between 108 mmHg and 132 mmHg?
*September 20, 2015*

**Math**

The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $9. Within what range are 68% of her phone bills?
*September 20, 2015*

**college algebra**

The total yearly food bill for a family of four is $9395.59. To the nearest cent, what is the mean weekly food bill?
*September 18, 2015*

**Math**

The five sales people at Southwest Appliances earned commissions last year of $13,000, $22,000, $47,000, $15,000, and $24,000. Find the mean commission.
*September 18, 2015*

**Math**

Find the mean, median, and mode. Round to the nearest tenth when necessary. 1) Given these board lengths: 20.2, 1.2, 5, 5.8, 16, 20.2, 5, 1.2, 20.2, 20.2
*September 18, 2015*

**Math**

If a trend line has equation y=-4x-6, what y- value would you expect to obtain when the x- value is 0? ?
*September 14, 2015*

**Math**

If a trend line has equation y=4x-5, what y- value would you expect to obtain when the x- value is 5? this is kind of tricky
*September 14, 2015*

**Math **

License plates are made using 3 letter followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed?
*September 10, 2015*

**Math**

210 was my choice answer and I got it wrong
*September 10, 2015*

**Math**

How many 3-digit numbers can be formed sing the digits 0,1, 2, 3, 4, 5, 6, if repetitions are not allowed? however 180 can't be the answer i checked? any one know how to solve this one
*September 10, 2015*

**Math**

What if its a fraction that given?
*September 9, 2015*

**Math**

So 100 is the total?
*September 9, 2015*

**Math**

at a track meet with 200 participants, 45 participate in jumping event, 1/3 of these jumpers are female, and 1/2 of the the total participants are female. What is the probability that a participant chosen at random is a jumper, given that the person is a female? Please please ...
*September 9, 2015*

**Math**

how many 3 digit numbers can be formed using the digits 0,1,2,3,4,5,6, if repitition is not allowed?
*September 9, 2015*

**algebra **

How many possible license plates can be formed consisting of five letters in the first letter must be either M,N, or P?
*September 3, 2015*

**history**

Which of the following descriptions applies to the Ku Klux Klan? The organization was centrally organized. It served the interests of Democratic politicians engaged in "redeeming" the South. The organization was used exclusively by planters. The organization was ...
*September 2, 2015*

**history**

The ______________________________ signaled the end of the Reconstruction era and completed the repudiation of the idea, born during the Civil War and pursued during Congressional Reconstruction, of a powerful federal government protecting the rights of all citizens. help?
*September 2, 2015*

**history 1302**

How often were most cowboys paid?
*September 2, 2015*

**algebra **

How many possible license plates can be formed consisting of three letters in the first letter must be either M,N, or P?
*August 28, 2015*

**Math**

The odds of rolling two dice and the sum being greater than 9 are 6 to 30. What is the probability that the sum of two rolled dice is less than or equal to 9? I got 1/5 because its greater? help.
*August 28, 2015*

**Math**

the odds in favor of an earthquake are 7 to 1. what is probability that an earthquake will occur? So is it 1/7 ? im confused
*August 28, 2015*

**Math**

if the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.20, what are the odds against a direct hit? 1 : 0.20 I :19 i think its like this way?
*August 28, 2015*

**Math**

A lottery game has balls numbered through 19. What is the probability of selecting an even numbered ball or a 4 ?
*August 28, 2015*

**Math**

correct*
*August 27, 2015*

**Math**

a lottery game has balls numbered 1 through 19. What is the probability of selecting an even numbered ball or a 4? Its hard one please anyone know how solve?
*August 27, 2015*

**math**

at a track meet with 135 participants, 25 participate in jumping event, 1/5 of these jumpers are female, and 1/3 of the the total participants are female. What is the probability that a participant chosen at random is a jumper, given that the person is a female? Please help?
*August 27, 2015*

**math**

one digit from the number 9,848,778 is written on each of seven cards. What is the probality of drawing a card that shows s 9, 8, or 4?
*August 26, 2015*

**mathematics**

one digit from the number 3,474,554 is written on each of seven cards. What is the probability of drawing a card that shows s 5?
*August 26, 2015*

**math**

Two dice are rolled. Find the probability that the score on the dice is 5.
*August 25, 2015*

**history**

the topic during the that time period
*August 24, 2015*

**history**

The 1920s and The Great Depression. The Flappers does any one know the story? summary?
*August 24, 2015*

**math**

The right awnser is 17.55% but I want to know how to get that the solution please help
*August 6, 2015*

**math**

The tight awnser is 17.55% but I want to know how to get that the solution
*August 6, 2015*

**math **

James purchased a bond for $3200, and ten months later he sold for $3700. What annual rate would he have to earn in a savings compounded monthly, to earn the same money on his investment?
*August 6, 2015*

**math**

A baseball team played 149 complete games last season. They had 31 fewer wins than losses. How many games did the team win?
*August 5, 2015*

**algebra/ math**

Solve the problem. Leave the answer in exponential notation. The expression 2^6 x64^t approximates the number of bacteria after t hours. After 1/2 hr, how many bacteria are those? is it 2^6..
*August 5, 2015*

**mathematics**

what is t that's what I'm trying to find
*August 5, 2015*

**mathematics**

A house was purchased for $67,000 After 7 years the value of the house was $130,000. Express the house's value V(t) in terms of time t in years.
*August 5, 2015*

**fundamentals math**

I got 9.9335897436 so its 10?
*August 5, 2015*

**fundamentals math**

Last year, Maria earned $312 per week. This year, her salary increased to $343 per week. What is the percent of increase?
*August 5, 2015*

**math**

945.168 and round to nearest cent. is 950?
*August 5, 2015*

**Fundamentals of Math**

10200
*August 5, 2015*

**Fundamentals of Math**

okay I know you multiply? since it wants to know how much spend on promotions
*August 5, 2015*

**Fundamentals of Math**

you divide $51,000 by 20% ?
*August 5, 2015*

**Fundamentals of Math**

An outlet store had monthly sales of $51,000 and spent 20% of it on promotions. How much was spend on promotions?
*August 5, 2015*

**Mathematics**

I subtracted the $320.09 by $11.20 but I wasn't sure so I added all the deductions and subtracted that by the $320.09..
*August 5, 2015*

**Mathematics**

308.89? or 238.85?
*August 5, 2015*

**Mathematics**

Its hard that's why I'm asking for help if you multiply and divide it becomes a large number
*August 5, 2015*

**Mathematics**

Ray's gross pay is $320.09 a week. &46 is witheld for federal income tax, $24.04 for FICAtax, and $11.20 for other deductions. Find his net pay? please help.
*August 5, 2015*

**Mathematics **

Ray's gross pay is $320.09 a week. &46 is witheld for federal income tax, $24.04 for FICAtax, and $11.20 for other deductions. Find his net pay?
*August 5, 2015*

**mathematics**

Jake has a cable that is 55.3 feet long. He wants to cut it into pieces that are 7.9 feet long. How many 7.9 foot pieces will he get from the cable?
*August 5, 2015*

**Algebra**

A stunt man drops from the top of a 50 foot elevator shaft. His height above ground is determined by the equation h=-16(t)(t)+50. At the moment the stunt man begins to drop, an elevator goes up so that its height above ground is determined by the equation h=34t. After how many...
*March 18, 2015*

**Algebra**

A stunt man drops from the top of a 50 foot elevator shaft. His height above ground is determined by the equation h=-16(t)(t)+50. At the moment the stunt man begins to drop, an elevator goes up so that its height above ground is determined by the equation h=34t. After how many...
*March 18, 2015*

**english**

Guys your source was good can you give another Web to search about Natalie Du toit
*March 1, 2015*

**english**

Disabled athlete .I mean their names and what they do
*March 1, 2015*

**english**

A disabled athlete who became well known
*March 1, 2015*

**english**

The story of a disabled athlete who became well known :narrative story
*March 1, 2015*

**staticsits**

65 % college students believe that their online education. give the null hypotheis for testing the claim made by survey what is the null hypothesis
*December 18, 2014*

**IMPROVING WRITING**

I have noticed that in the past three months, a month after Jessica Hilo’s medical leave, there have been problems concerning Ruth and Jack’s workload. To begin with, Jessica’s duties have been temporarily reassigned to Frank and Ralph. Furthermore, Ruth ...
*December 10, 2014*

**IMPROVING WRITING**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*December 10, 2014*

**English**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*December 7, 2014*

**Algebra 2**

Use Cramer's rule to find the number of items the company must sell each week to break even. y= 20x + 200 y= 25x D= |20 -1|. -20 - (-25) . |25 -1| D= 5 Dx= |200 -1|. -200 - 0 . |0 -1| Dx= -200 Dy= |20 200|. 0 - 5000 . |25 0 | Dy= -5000 x= Dx/D x= -200/5 x= -40 y= Dy/D y= -...
*October 29, 2014*

**Please help-algebra**

Multiply Everything By 100 To Get The Decimal Out. 100x= 10y + 1500 100y= 15x + 1000 100y= 1000x + 15 100x= 1000y + 15
*October 29, 2014*

**Algebra**

Write an equation that expresses the relationship. Then solve the equation for c. q varies jointly as c and the square of h.
*October 23, 2014*

**medical terminology**

what is busting forth of blood?
*October 4, 2014*

**algebra**

If you walk 3/4 mile and then jog 2/5 mile, what is the total distance covered?
*September 24, 2014*

**algebra 2**

Which of the following is the solution to |x|-2<-3? The less than symbol has a line under it if that changes.
*August 27, 2014*

**Chemistry**

Calculate the heat in kilojoules needed to vaporize 8.00kg of water at 100∘C.
*February 18, 2014*

**math**

3x 1/4 equal 3/4
*December 3, 2013*

**Math**

Using continuous compounding. A 13,000 deposit in an account with APR of 4.5 percent is. The balance in the account after 1 year is what.
*October 8, 2013*

**math theory**

write a rational and irrational number between 1.12301 and 1.1230101.
*April 30, 2013*

**physics**

A railroad car with a mass of 2.35 × 104 kg moving at 3.90 m/s collides and 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 1.25 m/s. a) What is the final speed of the three ...
*March 31, 2013*

**Narrative story**

Sorry I don't have any idea for your story
*March 9, 2013*

**Chemistry**

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46
*February 25, 2013*

**Chemistry**

What is the freezing point of a soluton is which 10.0 g of naphthalene [C10H8(s)] is dissolved in 50.0 g of benzene [C6H6(l)]? Extra info you might need: benzene= 5.12 degrees C m^-1 Answer should be: -2.46
*February 25, 2013*

**Chemistry**

Nitrocellulose lacquer is used as a protective coating on wood. What mass of nitrocellulose is contained in one gallon (3.8L) of lacquer that is 5.1% nitrocellulose by mass? The density of the lacquer is 0.79 g/mL.
*February 25, 2013*

**Math**

I=p*r*t p=600 fv=1200 I=1200-600=600 r=12%=0.12 t=? years t= 600/(600*0.12) t=8.33 years
*February 18, 2013*

**Math**

3p=p(1+ 0.14t) divide by p to get 3=1+ 0.14t 0.14t=3-1 t=2/0.14 t=14.286 years
*February 18, 2013*

**Chemistry**

The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in which 5.05 g C6H5COOH (benzoic acid) is dissolved in 25 g C6H6? Answer should be 93.9 mmHg
*February 18, 2013*

**Chemistry**

How many milligrams of a mixture containing equal numbers of moles of CH and N2 at 10.0 atm total pressure will dissolve in 1.00 L of water at 20 degrees C? Answer should be 2.1 x 10^2 mg
*February 18, 2013*

**Chemistry**

At 25 degrees C and 1 atm gas pressure, the solubility of CO2(g) is 149 mg/100 g water. When air at 25 degrees C and 1 atm is in equilibrium with water, what is the concentration of dissolved CO2, in mg/100 g water? Air contains 0.037 mol % CO2(g). the answer should come out ...
*February 18, 2013*

**Physics...**

While following the directions on a treasure map, a pirate walks 23.5 m north, then turns and walks 2.7 m east. What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m
*December 2, 2012*

**math**

A moose weighs 1,324 pounds.Show this number in three other ways.Label or describe each way.
*September 5, 2012*

**Physics**

Suppose the force exerted by the air on one face of a cube is 8820N. Each side of the cube measures 30cm. Calculate the pressure on this face?
*August 21, 2012*

**algebra**

Solve the following system of equations for the unknown variables. x + y = 12 x – y = –2 (NOTE: Show answer in the following format (#,#). If not entered in this format, will be scored incorrect.)
*July 5, 2012*

**Math**

How do you divide decimals? Ex. 0.05/0.04=?
*February 8, 2012*

**physics**

A hydraulic jack is designed so that when the handle is pushed down 1 m, the piston raising the load moves up 0.015 m. IMA= 66.67 AMA= 26.67 Efficiency= 40% At this efficiency, what is the force required to lift a 5000 N weight?
*February 8, 2012*

**Art History**

What are the three major forms of printmaking that were developed after the printing press was invented? Name the artist responsible for first creating prints as a new art form
*February 6, 2012*

**Physics**

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do?
*January 24, 2012*

**math**

If the inputs are 1 to 8,3 to 10, 5 to 12, and 7 to 14 what is the rule?
*January 18, 2012*

**Physics Honors**

A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom 10 m above. Assuming it just reaches the window, he throws the love gifts at 60° to the ground: a) At what velocity should he throw the bag? b) How far from the...
*December 2, 2011*