# jane

Newest questions and responses by jane-
## Chemistry

I really need help with this question, calculate the total pressure of a gaseous mixture containing 0.2 moles of Nitrogen, 0.4 moles of Water vapor and 0.8 moles of Argon. If the partial pressure of Water vapor is 1.2 Atmosphere.

*asked on March 19, 2019* -
## math

The sum of a AP is 26 and that of the next four terms is 74, Find the first term and the common difference

*asked on March 3, 2019* -
## physics

Suppose we launch a scientific rocket straight up from sea level (at standard conditions) with a pressure measuring device attached to it. Given that in the first 12 seconds the rocket experiences a 25% decrease in air pressure, what is the average speed

*asked on February 22, 2019* -
## Trigonometry- Application of Sine and Cosine Law

Q: A 4m flag pole is not standing up straight. There is a wire attached to the top of the pole and anchored in the ground. The wire is 4.17m long. The wire makes a 68 degree angle with the ground. What angle does the flag pole make with the wire? Show all

*asked on February 12, 2019* -
## history

Which statement about ethnic groups in Southwest Asia is accurate? A. Arabs are the majority in every country in the region. B. Arabs are the largest ethnic group in the region. C. Kurds make up the largest ethnic group on the Arabian Peninsula. D. People

*asked on January 14, 2019* -
## social studies

Which of the following factors is impeding economic growth in India? A. poor infrastructure B. its command economy C. microlending D. outsourcing

*asked on December 23, 2018* -
## chemistry

reacting species of C8H6NH, potassium hydroxide, aqueous ammonia, and calcium hydroxide

*asked on December 19, 2018* -
## chemistry

The active ingredient in some antiperspirants is aluminum chlorohydrate, Al2(OH)5Cl. Analysis of a 2.000-g sample of antiperspirant yields 0.334 g of aluminum. What percent (by mass) of aluminum chlorohydrate is present in the antiperspirant? (Assume that

*asked on December 19, 2018* -
## math

The Fiedler family has up to $130,000 to invest. They decide that they want to have at least $40,000 invested in stable bonds yielding 5.5% and that no more than $60,000 should be invested in more volatile bonds yielding 11%. How much should they invest in

*asked on November 21, 2018* -
## Math

3/5 of the booksin a class library are englishbooks. The rest are non-english books. If the total number of books in the library is 650, how many non-english books are there?

*asked on September 30, 2018* -
## Chemistry

Use the balanced equation for the reaction of lithium oxide with water: Li2O(s) + H2O(g) --> 2LiOH(s) to determine how many grams of H2O can be removed from the air by 250g of Li2O. Show your step-by-step solution with unit conversions.

*asked on September 26, 2018* -
## Algebra

Hello Ms.Sue. Can you check this to make sure I did it correctly. Thank you in advance for the help. What is the slope of the line 3x + 4y = 1? 4y=3x-1 y=(=3/4)time X-1/4 Slope, m=3/4

*asked on September 14, 2018* -
## algebra

Josephine’s ice cream shop always makes sure its sundaes maintain a ratio of 4:1 of ice cream to toppings. A group of friends orders sundaes and receives 5 cups of ice cream total. How many cups of toppings, total, did they receive? Please explain how I

*asked on September 14, 2018* -
## Government

Explain the principle of checks and balances as it relates to the power of the president. Provide one example to support your explanation.

*asked on September 10, 2018* -
## Science

Please elaborate John Dalton's statement,"all living things are made up of cells".By the way, I'm G-11 student.

*asked on August 27, 2018* -
## Science

Can you please elaborate John Dalton's statement,"all living things are made up of cells".By the way,I am g11 student.

*asked on August 26, 2018* -
## Physics

the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0 degree celsius at what temperature will the length of the rules become

*asked on July 28, 2018* -
## Physics

the length of an aluminum is 76.5cm and that of an iron ruler is 80cm at 0Â¡Ã£c. at what temperature will the length of the rules become

*asked on July 28, 2018* -
## Chemistry

What is the mole ratio of hydrochloric acid to carbon tetrachloride? How many moles of CCl4 are produced when 5 moles of CH4 reactant with chlorine? How many grams of carbon tetrachloride can be produced from reacting 710 grams of Cl2 with excess methane?

*asked on May 31, 2018* -
## Math

Paul is 20 years older than joy four years ago; the ratio of their ages was 7:3 find the present age of Paul

*asked on May 20, 2018* -
## Science

How are models limited by our patterns of thought?

*asked on March 19, 2018* -
## Math

Peter has $2000 invested in an account that gives him 5% interest a year. Write an equation for the amount of money, m, in his account after y, years. How much money will be in his account in 10 years, if he does not put any more in or take any out?

*asked on March 12, 2018* -
## Math

A surveyor sights two signs and the angle between the two lines of sight measures 55. If the first and the second signs are 70 m and 50 m away,respectively,from the surveyor, find the distance between the two signs .Express your answer to the nearest

*asked on March 5, 2018* -
## Math

Two ships leave the same port at the same time. One ship sails on a course of 110 degree at 32 mi/h. The other sails on a course of 230 degree at 40 mi/h. Find the distance between them after 2 hours. Express your answer to the nearest mile.

*asked on March 5, 2018* -
## Chemistry

Suppose you had sulfur hexafluoride as your unknown. It has a cost of $200 for 5 pounds of the substance. If your syringe has a volume of 125.0 mL, the room temperature was 78F, and the pressure was 755 mmHg, what would it cost to fill your syringe 3 times

*asked on March 1, 2018* -
## chemistry

At 90C the following equilibrium is established H2(g) + S(s) = H2S(g) Kc= 6.8x10^-2 If 0.17 moles of H2 and 0.4 mole of Sulfur are heated in a 1L vessel up to 90C, what will be the partial pressure of H2S at equilibrium? Dr. Bob, first is 0.32 atm correct?

*asked on February 26, 2018* -
## History

If a soccer ball is for the sport soccer, why isn't a football called a football ball if the football is also the name of the sport itself?

*asked on February 7, 2018* -
## Math

On graph paper, use a table to make a complete graph of y = x2 − 2x − 8. Homework Help ✎ Write the coordinates of the y-intercept. What is the connection between the y‑intercept and the equation y = x2 − 2x − 8? Write the coordinates of the

*asked on January 18, 2018* -
## Algebra

At the spring fling, john can make 5 cups of hot tea in 2 minutes. Sammy can make 6 cups of hot tea in 2.5 minutes. How long should it take them to make hot tea for all 245

*asked on December 18, 2017* -
## Statistics

Consider the probability that fewer than 17 out of 145 people will get the flu this winter. Assume the probability that a given person will get he flu this winter is 11%. Approximate the probability using the normal distribution. Round the answer to four

*asked on December 3, 2017* -
## Biology-ASAP

In a reaction you use 400 ul of 12mM B-galactosidase. Add 2.3 ml of buffer and 0.3ml of ONPG to a cuvette. what is the final concentration of the cuvette? Answer below to one decimal place.

*asked on November 12, 2017* -
## Math

the first term in the sequence is 256. after the first term, each term is multiplied by two amd then divided by four. what is the value of the 9th term

*asked on November 3, 2017* -
## Science

Suppose a mutation occurs in the gene for a particular aminoacyl-tRNA synthetase. The mutation changes which amino acid is recognized, without affecting which tRNA molecule is recognized. How is this likely to affect protein synthesis?Find all that apply.

*asked on October 26, 2017* -
## English

Correcting faulty Parallesim sentences. 1.The professors test were long,difficult,and produced anxiety. 2.Medical tests showed that neither being allergic to dust nor seasonal hay fever caused the child’s coughing fits. 3.The hair stylist warned her

*asked on October 24, 2017* -
## MaTh

Simplify i^1+i^2+i^3+... i^97 + i^98+i^99

*asked on October 7, 2017* -
## Math

$25000 is invested for 4 years 9 months .If the invesment is offered 12% compounded semi anually for the first 2 years and 10% compounded quarterly for the rest of the period,find the future value of this invesment.

*asked on October 4, 2017* -
## Math

Translate the sentence into an inequality. Ten times the sum of a number and 27 is at least 26.

*asked on October 1, 2017* -
## Math

On 12 february 2009,sally invested $2000 in a bank and received an amount or $2040 on 23 june 2009.calculate the simple interest rate offered by the bank

*asked on October 1, 2017* -
## Math

At what rate of simple interest will a sum of money double itself in four years

*asked on October 1, 2017* -
## Algebra

A geodesic dome is composed of two different types of triangular panels. One of these is an isosceles triangle. In one geodesic dome, the measure of the third angle is 70.5 degrees more than the measure of either of the two equal angles. Find the measure

*asked on September 15, 2017* -
## Algebra

Classrooms on one side of the drama building are all numbered with consecutive even integers. If the first room, the room with the smallest classroom number, on this side of the building is numbered x, write an expression in x for the sum of the first five

*asked on September 1, 2017* -
## Algebra

Use the distributive property to write the sum as a product. 2x+2y

*asked on August 21, 2017* -
## maths

i have two piece of ribbon one is 17.5cm longer than the other and 1/3 of one ribbon is the same as 3/4 of the other what is the size of the smaller ribbon

*asked on July 9, 2017* -
## Multivariable calculus

I have to show that the relative error of the product of two positive numbers is aproximately to the sum of the relative errors of its factors. My teacher told me to use first order approximation, but I don't know how to use it.Please help

*asked on June 14, 2017* -
## physics

if some of water in calorimeter splash out when tranfering the metal block, will it affect the experiment result?

*asked on May 22, 2017* -
## Math

You have to answer 3 essay questions for an exam. There are 6 essays to choose from. How many different groups of 3 essays could you possibly choose?

*asked on May 3, 2017* -
## calculus review please help!!

The velocity of a particle moving along the x-axis is v(t) = t^2 + 2t + 1, with t measured in minutes and v(t) measured in feet per minute. To the nearest foot find the total distance traveled by the particle from t = 0 to t = 2 minutes.

*asked on April 27, 2017* -
## math

It takes a hose 3 minutes to fill a rectangular aquarium 10 inches long, 12 inches wide, and 13 inches tall. How long will it take the same hose to fill an aquarium measuring 22 inches by 30 inches by 33 inches?

*asked on April 4, 2017* -
## bussiness

1.Please calculate how many cartons (rounded number) a 20ft GP Container can accommodate respectively according to the information above. 20ft GP container:cartons

*asked on March 29, 2017* -
## math

You have a total of 52 dimes and quarters. You have 10 more quarters than dimes. Which system of equations can you use to find the number x of quarters and number y of dimes you have? Use the system to determine how much money you have in quarters and

*asked on March 15, 2017* -
## English 11

Can you send me a good reference about how to create a project proposal for a middle school stude like me? Thanks a lot.

*asked on March 12, 2017* -
## Writing

Anyone who knows a good source on how to write a project proposal?

*asked on March 12, 2017* -
## Finance

What is the present value of $100 PERPETU I TY of the interest rate is 7%? If interest rates doubled to 14%, what would its present value be? At 7% hundred dollars multiplied 0.943 equals 9430 or is it 14.2857 multiplied 100 equals 1428. 57? At 14% is it

*asked on March 7, 2017* -
## math

a printer prints 17 pages is 6 minutes. how many minutes per page

*asked on March 2, 2017* -
## Math

A segment that is a units long makes a C-degree angle with a segment that is b units long. In terms of a, b, and C, find the third side of the triangle defined by this SAS description.

*asked on February 19, 2017* -
## Math

A circular sector has an 6.26-inch radius and a 10.84-inch arc length. There is another sector that has the same area and the same perimeter. What are its measurements?

*asked on February 19, 2017* -
## Financial management

You are an incredibly sexy individual and have just won best price in a beauty context.you have the following options a)$1000 received now b)$180000 at the end of five years C)$11400per year for ever Prove to select the optimal price assuming discount rate

*asked on February 11, 2017* -
## Political Science

What are some pros and cons to privatizing the U.S Postal Service?

*asked on February 10, 2017* -
## physics

An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy. In an experiment, v and y are measured and the measured values are used to calculate g. If the percent

*asked on February 5, 2017* -
## biology

Which of the following organs remove nitrogenous waste from the body? a. Liver b. Large Intestine c. Kidneys d. Gall Bladder

*asked on January 26, 2017* -
## Visual Basic Programming in Visual Studio 2015

I have an application program to submit help tickets. The problem is the error messages are only supposed to pop up when someone doesn't format it correctly but it either don't or comes up after typing when there is no errors. The next issue is my msgbox

*asked on December 1, 2016* -
## American Government

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C.

*asked on November 26, 2016* -
## Math

A store buys shirts for $12 each and marks up the price by 25%. What is the price for a shirt at this store?

*asked on November 1, 2016* -
## Physics

two blocks (a and b) are in contact on a horizontal frictionless surface. a 60N constant horizontal force is applied to A. the mass of a is 3.0 kg and the mass of b is 15 kg. what is the magnitude of the force of a on b

*asked on October 27, 2016* -
## STATISTICS

Miss Dombo, a Ticketing Manager with an Airline flying international routes, has realised that not all passengers show up for their reserved seat. It is clear to her that each passenger’s behaviour is independent of the other. Having fixed the chances of

*asked on October 27, 2016* -
## biology (genetics)

A pure-breeding white mouse with a long tail was crossed to pure-breeding pink mouse with a short tail. The F1 progeny were all pink with long tails. These F1 mice were test crossed to white mouse with a short tail. If the gene controlling color and the

*asked on October 24, 2016* -
## Genetics

A pure-breeding white mouse with a long tail was crossed to pure-breeding pink mouse with a short tail. The F1 progeny were all pink with long tails. These F1 mice were test crossed to white mouse with a short tail. If the gene controlling color and the

*asked on October 24, 2016* -
## Math

Village B is 7km due south of village A and village C is 9km due south of B. Village D is 8km from A and is due east of B. Find DB and DC.

*asked on September 24, 2016* -
## Physics

If you apply a changing force, will either the velocity or the acceleration change in the same way as the force?

*asked on September 18, 2016* -
## Math

I have to invest $7000 and would like $300 as earnings from the investment. How much should I invest in stock that's getting 13% annual return and how much should I invest in a bond that pays 2%?

*asked on September 15, 2016* -
## Math

Between midnight and 6:00am, the temperature dropped 10 degrees F. Between 6 am and 12:00; the temperature rose 18 degrees F.What was the change in the temperature from midnight to noon. I can't seem to get the formula for this problem

*asked on September 15, 2016* -
## Math

Jenny bought 3.50 pounds of peanuts for $12.60.Her friend buy's 4.00 pounds of pecans for $15.20. Which is less expensive per pound? By how much?

*asked on September 12, 2016* -
## Calculus

Hi, please I need help with this demonstration: If “f” , “g” :[ 0,1]→R are continuous functions, they are differentiable in (0,1), f(0)=0, g(0)=2 and │f ‘ (x)│≤1 ,│g ‘ (x)│≤1 for the interval (0,1). Prove that f(x) < g(x) in

*asked on September 3, 2016* -
## chemistry

2.00g of carbonate reacts with excess hydrobromic acid. Use this balanced equation to fond the theoretical yield. Na2Co3 + 2HBr = CO2 + H2O + 2NaBr

*asked on August 16, 2016* -
## Algebra

Where do you insert parenthesis to make this equation true: 3x5+4-2x2+6-4=15

*asked on August 11, 2016* -
## Chemistry

The human body obtains 885 kJ of energy from a chocolate chip cookie. If this energy were used to vaporize at 100 degree Celsius, how many grams of water could be vaporized? The heat of vaporization of water at 100 degrees Celsius is 40.7 kJ/mole.

*asked on July 20, 2016* -
## Chemistry

The human body obtains 885 kJ of energy from a chocolate chip cookie. If this energy were used to vaporize at 100 degree Celsius, how many grams of water could be vaporized? The heat of vaporization of water at 100 degrees Celsius is 40.7 kJ/mole.

*asked on July 19, 2016* -
## Math

The ratio of a triangle's sides is 4:3:6. If the length of the hypotenuse is 1/4, what is the value of the length of the short leg of the triangle subtracted from the length of the long leg of the triangle? Help please?

*asked on July 13, 2016* -
## Physics

1, A Body Of Mass 6kg Was Acted Upon By A Constant Force Of 18N. Calc Its Velocity In 5sec. 2. A Car Moving At 108km/hr Was Gradually Brought To Rest By Constant Force Of 2500N After 8sec. Calc The Decelleratio

*asked on July 12, 2016* -
## science

what are some examples of a suspension? i need help!!!

*asked on July 11, 2016* -
## Math

There are 12 more toy cars than toy trucks in a toy box with a total of 38 toy cars and trucks. How many toy trucks are in the toy box?

*asked on July 5, 2016* -
## math

100 meters of fencing is available to enclose a rectangular area next to a river .Give a function that can represent the area that can be enclosed in terms of X

*asked on June 28, 2016* -
## Calculus - Discontinuity

What kind of discontinuity is this piecewise function? Removable or jump? f(x) ={ (2x^2 - 5x - 3)/(x-3) if x does not equal 3 ............6............................if x = 3

*asked on June 27, 2016* -
## math

simplyfy if quadratic equation or not quadratic equation and arrange into quadratic equation form 25-r2=4x

*asked on June 21, 2016* -
## math

a garden 7m by 12m will be expanded by planting a border of flowers,the border will be of the same width around the entire garden and has an area of 92m

*asked on June 18, 2016* -
## PreAlgebra

Leg of 7 km and hypotenuse of 22 km

*asked on June 8, 2016* -
## chemistry

A certain first order reaction has a rate constant of 5.68 x 10–3 s–1 at 139°C and a rate constant of 8.99 x 10–1 s–1 at a temperature of 215°C. Ea = 111 kJ mol– q1) What is the value of the rate constant at 275°C? q2) At what temperature

*asked on June 2, 2016* -
## English

8. which of the following quotes from "the morning of june 281948" best describe the aversion that the public felt toward Shirley Jackson's short story "The lottery" a. "as a matter of fat when I read it over later I decided that except for one or two

*asked on May 19, 2016* -
## Maths -Logarithm

Q) what is the hundreds digit in 3^3^3? What are the steps in simplifying this number? Ty

*asked on May 14, 2016* -
## Algebra

What is the value of c so that y=x^2+9x+c is a perfect square trinomial? A. 18 B. 9/2 C. 9/4 D. 81/4 My answer is D.

*asked on May 13, 2016* -
## maths

if expressed in square millimeter what is 25 square meter 2:a football pitch which was originally 80m long had it length increased by 20m if the width of 70 m has remained unchanged what is the difference between the old nd d new perimeter of d pitch

*asked on May 9, 2016* -
## Math

Let f(x) = x^3 + 3x ^2 + 4x - 7 and g(x) = -7x^4 + 5x^3 +x^2 - 7. What is the coefficient of x^3 in the sum f(x) + g(x)? Thanks.

*asked on April 25, 2016* -
## Absolute and relative change

In one region the number of students in Math 101 is 20% more than the number of students in Math 123. If there are 480 students in Math 101, how many students are in Math 123?

*asked on April 24, 2016* -
## Absolute and relative change

You are charged $279 on your credit card for a hotel stay, you call to complain about the unexpectedly high charge, but are told there are a total of 24% taxes for hotel rooms where you stayed. What was the advertised price of the room before taxes?

*asked on April 24, 2016* -
## Business

The number of square meters in a square rooms floor area exceed the number of meters in the rooms perimeter by 60.Find the side-length of the room.

*asked on April 18, 2016* -
## math

In one month a salesman sold a total of 30 cars and trucks. If three times the number of cars sold equals twice the number of trucks sold, how many trucks did he sell?

*asked on April 18, 2016* -
## math

Find all x such that x^2+5x

*asked on April 15, 2016* -
## math

Find p such that px^2-12x+4=0 has only one solution. Thank you!!!

*asked on April 14, 2016* -
## interest

Bryan invests $500 in an account earning 4% interest that compounds annually. If he makes no additional deposits or withdraws, how much will be in the account: About how long would it take to double his $500 investment? Round to one decimal place.

*asked on April 10, 2016* -
## Math/Algebra

Let f(x) = (3x - 7)/(x + 1). Find the inverse f^(-1)(x).

*asked on April 9, 2016*