# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 773-
## Separation of Racemate- Chemistry Lab

Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) I found the answer

*asked by Jesicca on October 14, 2014* -
## Help! Science....

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of

*asked by Mae on September 5, 2012* -
## Scientific Question

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of

*asked by Nina on September 4, 2012* -
## science... Help me urgent!!

Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of

*asked by Mae on September 4, 2012* -
## Science

*asked by Mae on September 4, 2012* -
## HELP WITH ACC

I need help on the freight charges of each transaction, I always get confused when I see the FOB’s. Presented here are selected transactions for Norlan Inc during September of the current year. Norlan uses a perpetual inventory system. Sold merchandise

*asked by F on October 17, 2006* -
## Accounting

I need help on the freight charges of each transaction, I always get confused when I see the FOB’s. Presented here are selected transactions for Norlan Inc during September of the current year. Norlan uses a perpetual inventory system. Sold merchandise

*asked by F on October 15, 2006* -
## Accounting

I need help on the freight charges of each transaction, I always get confused when I see the FOB’s. Presented here are selected transactions for Norlan Inc during September of the current year. Norlan uses a perpetual inventory system. Sold merchandise

*asked by F on October 16, 2006* -
## Business

Assume that you own a sandwich shop. In looking over last year's income statement you see that the annual sales were $250,000 with a gross margin of 50 percent, or $125,000. The fixed operating expenses were $50,000: the variable operating expenses were 20

*asked by Leslie on September 1, 2012* -
## stats

A clothing company employs 36 workers on first shift and 19 workers on second shift. Five workers are chosen at random to be interviewed about the work environment. Find the probability of choose: a) All first-shift workers b) all second-shift workers c)

*asked by Kristi on February 10, 2013* -
## Physics

A ball is on the end of a rope that is 1.75 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, rotates about the pole's symmetry axis. The rope makes an angle of 78.0° with respect to the vertical. What is

*asked by Ray on October 23, 2016* -
## Physics

A diver thinks that if a typical snorkel tube of 0.13 m length works, then a tube of length 6.2 m should also work. When trying to use such a tube, what is the pressure difference between the external pressure on the diver's chest and the air pressure in

*asked by Paulina on January 19, 2013* -
## math foundations 20

How do I solve normal distribution word problems? Ex A manufacturer offers a warranty on it's coffee makers. The coffee makers have mean lifespan of 4.5 years, with standard deviation of 0.7 yeaes. For how long should the coffee makers be covered by the

*asked by Ayane on June 9, 2014* -
## Math Word Problem

a new blend of coffee will cost $3.90 per pound by mixing 2 coffees that sell for $2.75 and $5 per pound. what amounts of each coffee should be blended to obtain the desired mixture? (the total weight of the desired blend is 100 lbs) How would I solve

*asked by Amy~ on September 12, 2010* -
## algebra

Can someone please explain this qestion and how to solve. A doctors office schedules 15 min appointments for weekdas. The doctor limits these appointments to, at most, 30 hours per week. Write an inequality to represent the number of 15 min appointments x

*asked by jay on September 15, 2012* -
## algebra

2. The equation gives the distance, D, in miles that a person can see to the horizon from a height, h, in feet. a. Solve this equation for h. b. Long’s Peak in the Rocky Mountain National Park, is 14,255 feet in elevation. How far can you see to the

*asked by tina on September 22, 2010* -
## Physics

Hey I'm not sure how to solve this problem: An 1840 kg car is moving to the right at a constant velocity of 2.94 m/s. What's the netforce? What's the netforce if the car would be moving to the left? I'm thinking that the net force going right and the net

*asked by Robert on September 16, 2008* -
## math

secret riddle worksheet riddle: why did the teacher wear sunglasses? 1) different x's _ _ _ _ _ _ _ _ 2) monomialor sum of monomials P O L Y N O M I A L 3) set of data graphed as ordered pairs in a coordinate plane S C A T T E R P L O T 4) 2 solutions that

*asked by confused gurl on May 7, 2007* -
## java/programming repost

In this exercise, you will be writing a simple java program to explore the decision making mechanism using if/else and switch statements. The program is consists of one class (RentalCalculator). It will hold only one method, of course, in that case the

*asked by Anonymous on January 31, 2019* -
## java/programming Please Help Me!!

In this exercise, you will be writing a simple java program to explore the decision making mechanism using if/else and switch statements. The program is consists of one class (RentalCalculator). It will hold only one method, of course, in that case the

*asked by Anonymous on January 31, 2019* -
## Evolution

In an experiment using quantitative genetic approaches to investigate the evolution of butterfly eye-spots as a model system for understanding development. There are 3 groups of butterfly populations: small (mean diameter = 2.6 mm), intermediate (3.4 mm),

*asked by Jake on November 5, 2007* -
## Chemistry

What will happen if a small amount of hydrochloric acid is added to a 0.1 M solution of HF? A) The percent ionization of HF will increase. B) The percent ionization of HF will decrease. C) The percent ionization of HF will remain unchanged. D) Ka for HF

*asked by Robby on March 7, 2013* -
## Chemistry

Thank you so much for the help on my other question!!! An alloy (solution of metals) is 80% by volume iron. The rest is aluminum. Aluminum has a density of 2.70 g/cm³, and iron's is 7.87 g/cm³. A block of alloy measures 2.0 ft. wide and 3.0 ft. long. If

*asked by Matthew on October 8, 2011* -
## Math

To get a driver's license, an applicant must pass a written test and a driving test. Pasts records show that 80% of the applicants pass the written test and 60% of those who have passed the written test pass the driving test. Based on these figures, how

*asked by Ava on March 29, 2017* -
## chemistry

QUESTION 11 Information Set 1: Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. What is the molar solubility of chromium (III) iodate at 25°C? a. 8.4 x 10–2 mol L–1 b. 2.2 x 10–3

*asked by jess on May 27, 2016* -
## science - chemistry

Some heat is supplied to a mixture of ice and liquid water in a closed container and the contents of the container are thoroughly mixed. If, after the addition of heat, both ice and liquid water remain: A) the temperature of the system will increase B) the

*asked by S on December 27, 2010* -
## Physics

On a safari, a team of naturalists sets out toward a research station located 6.3 km away in a direction 42° north of east. After traveling in a straight line for 2.2 km, they stop and discover that they have been traveling 23° north of east, because

*asked by yoyoma on August 18, 2010* -
## math

It is a proof. Given: line DB bisects line AC line AD is parallel to line BE AD=BE Prove: DB=EC there are two triangles connected together by point B. They are labled A D B and B E C. D and E are the top points of the triangles. they look like they would

*asked by ann on October 8, 2006* -
## MATH

A beautiful Princess is locked inside the Castle. A Moat 15 metres wide surrounds the Castle. A Knight is attempting to rescue the Princess but he only has two planks of wood, both 14.5 metres long. How can the brave Knight bridge the Moat and rescue the

*asked by Sandy on July 11, 2016* -
## Physics

A 10.0 g bullet is fired into a 1.0 kg block initially at rest on a rough surface and connected to a spring with k = 200N/m. Immediately following the collision the block has a speed of 2.0 m/s. The coefficient of friction between the ground and the block

*asked by Hailey on November 30, 2010* -
## Check my answers for drivers education please!

star*** by my answer 1. When you must handle several hazards at the same time, the best tactic is to (1 point) compromise the hazards. adjust speed to separate the hazards. minimize, then separate the hazards. **** 2. How many zones of space surrounding

*asked by Anonymous on March 31, 2016* -
## Algebra

For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 25 tons of rock to cover the area. If each ton costs $62 and each tree is $76, what is the maximum number of trees you can buy

*asked by Imagine on April 22, 2011* -
## physics

An explosion breaks an object into two pieces, one of which has 3.20 times the mass of the other. If 8000 J were released in the explosion, how much kinetic energy did each piece acquire? I started with using KE = (1/2)mv^2 and m1v1 = m2v2. Then

*asked by micole on May 29, 2007* -
## Finance

You wish to deposit an amount now that will accumulate to $100,000 in 10 years. How much less would you have to deposit if the rate of interest was 8% compounded monthly versus annually? So ive tried doing this question but I cant seem to get the final

*asked by Sarah on February 22, 2019* -
## matt/116

b. For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 30 tons of rock to cover the area. If each ton costs $60 and each tree is $84, what is the maximum number of trees you can buy

*asked by Angela on June 12, 2011* -
## Pre-Cal

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. Assuming that you invest $12,000 in the Japan(1.5%), how long (to the nearest year) must

*asked by Rick on February 29, 2012* -
## algebra

b. For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 30 tons of rock to cover the area. If each ton costs $60 and each tree is $84, what is the maximum number of trees you can buy

*asked by Anonymous on April 21, 2010* -
## Physics

Could someone try helping me solve those 2 questions or write me a formula with equaion what to do , thanks for every bit of help A 600kg elevator accelerates upward from rest for 10 seconds through 40.0meters. Find the cable tension a) 5130 N b) 5400 N c)

*asked by needhelp on January 27, 2010* -
## Business Statistics

The following tables shows the hourly wages of all workers in a certain hospital. Determine the pearsonian coefficient of skewness (population data). Hourly wages frequency 90-99 5 100-109 9 110-119 5 120-129 7 130-139 5 140-149 3 My answers: mean = 116.56

*asked by rianne on March 7, 2015* -
## hfcc

For the first phase of the project, imagine you want to cover the backyard with decorative rock and plant some trees. You need 30 tons of rock to cover the area. If each ton costs $60 and each tree is $84, what is the maximum number of trees you can buy

*asked by Loren on July 11, 2010* -
## math

One side of the triangular flower garden has length of 4.5 m, the second side is twice as long as the first side. The length of the third side is 3 m less than that of the second side. What is the perimeter of the garden With solution

*asked by rinne on September 4, 2014* -
## Physics , Pls help

A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the figure. As the station rotates, an astronaut in chamber A is moved 2.06 x 102 m along a circular arc. How far along a circular arc is an astronaut in

*asked by S on October 25, 2014* -
## physics

A space probe is to be put into a circular orbit of radius 42.00 km about an asteroid. At this radius the magnitude of the gravitational acceleration, normally referred to as the "gravitational field", is 1.00×10-3 meters per second squared. What speed,

*asked by bill on October 13, 2014* -
## Physics

Imagine a vessel containing 2.000 kg of liquid whose specific heat equals 1.50 kcal/kg/°c. Suposse that all of the liquid exists at its vaporization temperature of 450 k. We transfer 150 cal of heat energy to the liquid. What is the temperature of the

*asked by Jazz on April 11, 2016* -
## Finance

I missed one day of class and now i cannot figure this out... I thought that price and YTM relied on each other and now I have a question asking to solve for each? An 11% semiannual bond matures in 7 years. The bond has a face value of $1,000 and a current

*asked by Adam on March 29, 2011* -
## Math 8th grade

"The volume of a box can be found by multiplying the length times width times height of a box (V = lwh). If the volume of a box is 1,300 cubic inches and all its dimensions are equal, what is the side length of the box in inches?" Someone else posted the

*asked by Unknown Error on October 15, 2018* -
## math

for an annual fee of $30 you can join a movie club that will allow you to purchase tickets for $5.50 each at you local theater. If the theater charges $8 for movie tickets write an solve an equation to determine how many movie tickets you will have to buy

*asked by lewis on January 11, 2010* -
## Geometry

Use an indeirect proof to show that John exceeded the 55 MPH speed limit if he left his house at 8:15 a.m. and arrived at his office 60 miles away at 9:00 a.m. Assume temporarily that John traveled at a constant speed of 55 mph and that was his maximum

*asked by DANIELLE on June 12, 2007* -
## Biomechanics

While pushing off against the starting blocks at the beginning of a race, Olympic swimming great Michael Phelps generates a force that increases linearly from 0 N to 800 N over the first 0.30 s, and then decreases steadily back to 0 N over the remaining

*asked by Brendan on April 6, 2014* -
## Math

I'm not sure how i'm supposed to set up the equation to solve this. A phone company offers a plan for long distance service charges of .08 per minute. Another phone company offers a plan for $6 per month plus .02 per minute. For what number of minutes per

*asked by Jessie on October 21, 2014* -
## MATH

Using the proportion rule to solve this problem-is this correct? Enrollment in the Ski/Snowboard Club increased by 30% this year. There are now 182 students in the club. How many students were there last year? 182x100=18200/30=607 607-182=425 answer 425

*asked by Amie on March 31, 2016* -
## chemistry

How many grams silver (Ag) is added to 13 grams gold to produce 85% gold (Au) alloy? Can someone please give me the derived formula to be used? I had managed to solve it though I'm not quite sure if it's correct. i got 73.67g Ag, can someone please correct

*asked by Epinephrine on October 7, 2016* -
## english

need some help!which language learning strategies are you using when you need to solve these tasks: 1.Rewrite the sentences using adverbs I'm a terrible dancer.I dance_______ 2.Read the text and make questions and 3.Make subject and object questions So

*asked by jane on December 7, 2008* -
## math/phys

someone tell me why this answer is wrong...u are given final wavelength of 0.0022 nm, u want to solve for the intial wavelength using the compton scattering equation which is final wl -intial wl= 0.002426(1-cos(theta)) theta is 45 degrees. so initial w.l.

*asked by paul on December 9, 2015* -
## Math PLEASE HELP!!!!

use fraction bars to help: a) 11/12=w+y b)3/8=3/6-k c)1/4=n-7/12 d) how many 1/12's are in 1 1/4? help! im sooooooo..... confused! for d) put 1 1/4 into an improper fraction. That would be 5/4. Follow so far? Then cross multiply 5/4 and x/12. So, 4x =

*asked by Destiny on January 2, 2007* -
## math

hi to all teachers kindly please help me to solve this word problems thanks and god bless u always.question is below.i need for my homeworkpls. q.Saltly has a piece of cloth. She used 1/3 of the cloth to make a pillow cover and another 4/7 of the cloth to

*asked by maria on February 13, 2011* -
## math

The Yankee Clipper leaves the pier at 9:00 am at 8 knots. A half hour later the River Rover leaves the same peir going in the same direction traveling at 10 knots. At what time will the River Rover overtake the Yankee Clipper? Please help me solve this

*asked by Shayna on October 4, 2009* -
## Algebra

2. Use the Pythagorean Theorem to solve the following: A. A baseball diamond is a square of 90 feet on each side. How long is a throw from first base to third base? B. The bottom of a 25 foot plank is placed approximately 7 feet from the side of a barn.

*asked by jesse on September 12, 2010* -
## 6TH GRADE MATH

A sperms whale can stay under water 7 times as long as X minutes more than a platypus can. Write an equation that states the relationship of the minutes these two mammals can stay under water. Sperm whale - 112 Platypus - 10 my answer is 7*X+10 X=112 Did I

*asked by jamar on January 8, 2015* -
## chemistry

Determine the number of photons: A certain photon detector receives a signal of total energy 4.05*10^18 Joules from radiation of wavelength 535.00nm. (The only equation I can think to use is E(energy)= 6.63*10^-34 * (C(speed of light) / wavelength, but

*asked by Brooke N on November 11, 2015* -
## business

Truthfully, the only difference between you and garage floor coatings experts is time. If you'll invest a little more time in reading, you'll be that much nearer to expert status when it comes to garage floor coatings. The coating process is specifically

*asked by How to increase the life of Floor on December 10, 2011* -
## Physics

A 50 kg piston with a radius of 50 cm floats on a cylinder that is filled with air. The air in the cylinder fills the entire volume, and begins at a height of 1 m. The cylinder is then heated, so that the column rises to a height of 2 m. What is the work

*asked by Anonymous on June 16, 2013* -
## Science

Read an article, and use the article to jump-start your thinking about designing your very own space mission. Think about what you want to explore in the solar system (and why!) and how you might get there. Click on the link below to read the Science

*asked by #1Student on February 20, 2014* -
## chemistry

In which solution (acidic, basic, neutral water, or doesn't matter) is potassium bromide most soluble? a. acidic b. basic c. neutral d. doesn't matter

*asked by Nick on October 10, 2010* -
## College Chemistry

Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor pressure of 41 torr at 32oC.

*asked by Molly on November 19, 2010* -
## Grammar

Solution-dependence-alternative (find) Answer:alternative and dependence Resources-technology-stocks(deplete) Answer:Resources and stocks Now is it correct ??

*asked by Maryam on June 7, 2013* -
## Chemistry

A certain indicator, HA, has a Ka value of 1.3 × 10-6. The protonated form of the indicator is blue and the ionized form is red. What is the pKa of the indicator? What is the color of this indicator in a solution with pH = 8? Blue, red, or purple?

*asked by Nancy on February 26, 2013* -
## math

The length, l, of a rectangle is 2 feet less than three times the width, w, of the rectangle. The area of the rectangle is 481 square feet. Find the length and width of the rectangle. how do i work this problem out?

*asked by Anonymous on October 16, 2009* -
## General Physics 1

A force ~F = Fx ˆý+Fy ˆ| acts on a particle that undergoes a displacement of ~s = sx ˆý + sy ˆ| where Fx = 10 N, Fy = −4 N, sx = 6 m, and sy = 1 m. 1. Find the work done by the force on the particle. Answer in units of J 2. Find the angle between

*asked by Charles on July 26, 2013* -
## math

The call letter of a radio station must have 4 letters.The first letter must be a K or a W. How many different station call setters can be made if repetitions are not allowed? If repetitions are allowed? I have the answers just need to know the work

*asked by Ellen on June 3, 2012* -
## English

At Eastman High School reunions, the conversation usually gets around to the question “who was our best teacher?” And year after year, the (1) ____(Consensus)of the graduates has been that Mr. MacDonald was the best. Many remember Joe MacDonald as the

*asked by Sora on May 12, 2015* -
## 6th grade Math

I need some help figuring out how to work the word problem below. It says in 2000, the population of the United States was 280 million people. Between 1990 and 2000, the population grew by about 12%. What was the US population in 1990? The answer choices

*asked by Brandi on September 13, 2012* -
## Business

Can you help. Thinking about this I think a company can't really make a-lot of profit if they spend no money on quality controls because,"quality control is the more traditional way that businesses have used to manage quality. Quality control is concerned

*asked by Bryan on April 6, 2009* -
## calc

Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers c that satisfy the conclusion of Rolle's Theorem. f(x)= x sqrt(x+21) , [-21,0] If there is more than one solution separate your answers

*asked by Jossy on April 12, 2007* -
## college

A 1.362 g sample of an iron ore that contained Fe_3O_4 was dissolved in acid and all the iron was reduced to Fe^2+. the solution was then acidified with H_2SO_4 and titrated with 39.42 mL of 0.0281 M KMnO_4 , which oxidized the iron to Fe^3+. Net ionic

*asked by mohd on April 3, 2010* -
## Chemistry

At 25°C, the methylaminium ion, CH3NH3+, has a Ka of 2.0 x 10–11. Which of the following is the pH of a 0.15 mol L–1 solution of methylamine? i tried out two methods because im not getting the right answer: H20 + Ch3Nh2 -> CH3NH3+ + OH- I made a

*asked by Please help I tried for so long! on June 8, 2016* -
## ALGEBRA

can you help with these: for each inequality tell whether the number after symbol ; is a solution. x -3 ; 3 i said yes k ¡Ý 5 ; 0 i said no 3z ¡Ü 12 ; 4 i said yes n - 5 >3 ; 6 i said no 2g + 8 ¡Ý 3 ; -1 i said yes also i need to write real word

*asked by MARKO on November 2, 2011* -
## Chemistry

What stoichiometric concentration of the indicated substance is required to obtain an aqueous solution with the pH value shown below? aniline (C6H5NH2) for PH of 9.05 I converted pH to pOH so pOH=4.98 [OH-] =1.122*20^-5 C6H5NH2 + H2O --------> C6H5NH3+ +

*asked by Kiana on March 2, 2012* -
## Chemistry

If all ionic substances completely ionized, the aqueous solution with the lowest freezing point would be 1)0.25m NH4NO3 2)0.30m BaCl2 3) 0.35m LiBr 4) 0.50m Sucrose 5) 0.40m MgSO4 I know that i have to multiply m and i to find the largest delta T. I am

*asked by Hannah on February 12, 2012* -
## Chemistry

A 70.0 mL solution of 0.171 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.171 M HCl. The pKa values for the amino acid alanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to the carboxylic acid and amino groups, respectively. a) Calculate

*asked by Bobby on February 28, 2016* -
## Chemistry

The pH of 0.50 M HBrO(aq) is 4.50. Calculate the change in pH when 6.50 g of sodium hypobromite is added to 110. mL of the solution. Ignore any change in volume. Ka of HBrO is 2E-9 I found the amount of moles used for each (.0547 mol NaBrO, and .055 mol

*asked by Trixie on March 16, 2010* -
## Differential Equation 4

A differential equation governing the velocity v of a falling mass m to air resistance proportional to the square of the instantaneous velocity is m dv/dt=mg-kv^2 where k>0 is a constant of proportionality. The positive direction is downward. (a)Solve the

*asked by ijat on April 6, 2015* -
## Algebra

During a hurricane evacuation from the east coast of Georgia, a family traveled 260 miles west. For part of the trip, they averaged 70 mph, but as congestion got bad, they had to slow to 20 mph. If the total time of travel was 9 hours, how many miles did

*asked by Sherrie on October 6, 2015* -
## TAG. Math

How do I solve Radical square root. Such as 11 times the square root of 196 divided by 9 times the square root of 256

*asked by Dakota on January 14, 2009* -
## Math

First tray apple is 1/5 bad, second tray apple is less 5 apples and 1/4 bad apple, write equation tray 1 in terms of x and solve x

*asked by Anonymous on March 3, 2018* -
## Economic

1. Use the following information to answer the questions below. Please note that output of good X is measured in 100’s on the x axis, i.e. if you find Q = 10 then output is 10 × 100 = 1, 000 units. You must have a diagram to support you answers. •

*asked by Vishal on November 17, 2011* -
## Economic

1. Use the following information to answer the questions below. Please note that output of good X is measured in 100’s on the x axis, i.e. if you find Q = 10 then output is 10 × 100 = 1, 000 units. You must have a diagram to support you answers. •

*asked by Vishal on November 17, 2011* -
## Physics

an iron of diameter 4 cm at 25 degree and a cylinder of diameter 4.002 cm is made of the same material at the same temperature. to what temperature the ring should be heated so that the cylinder passes through the ring easily.? a) 41.6 degree Celsius b)

*asked by Urgent Help on August 24, 2012* -
## Japan

Which describes a difference between life in Japan and life in the United States? (A) More people in the U.S attend school. (B) Japan's growth is greatly limited by its geographical space. (C) Japanese people must work multiple jobs in order to make ends

*asked by Haruhi on March 3, 2016* -
## Physics repost

A magnetic field has a magnitude of 1.2 10-3 T, and an electric field has a magnitude of 5.9 103 N/C. Both fields point in the same direction. A positive 1.8 µC charge moves at a speed of 2.9 106 m/s in a direction that is perpendicular to both fields.

*asked by Mary on September 29, 2007* -
## Chem202 - for DrBob222

Dr. Bob222: There is a problem you answered .100M HClO2 titrated with .080M NaOH I can work the problem many times but I am getting 7.30pH and the answer says 7.38 using quad. I used quad and still get 7.30. I also do know how you go from the

*asked by Steve on May 26, 2013* -
## Chemistry

Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half life of 2.48 * 10^5 years Thorium-230 has half life of 8.0 * 10^4 years Radium-226 has half life of 1.62 * 10^3 years Lead-210 has half life of 20.4 years. The rate constant for the decay

*asked by Harry on March 20, 2012* -
## Physics Entropy Project

We did a lab in class where we heated a nail, and our goal was to determine the total increase in entropy of the system. I have all of the measurements but I'm not sure how to go about figuring out the change in heat (delta Q). delta S = delta Q / delta T

*asked by George on January 27, 2010* -
## Math

The equation h=-16t^2+112t gives the height of an arrow, shot upward from the ground with an initial velocity of 112ft/s,where t is the time after the arrow leaves the ground. Find the time it takes for the arrow to reach a height of 120ft. Put in h for

*asked by Audrey on June 9, 2007* -
## Algebra 1---Urgent! Please, help me!

1. A store manager is accepting applications for part-time workers. He can hire no more than 14 people. So far, he has hired 9 people. Write and solve an inequality to determine how many more people the manager can hire. 2. 4/5h => -2 3. A designer is

*asked by Anonymous on October 28, 2013* -
## math,help

I need help with thisone solve: ((x)/(5x+10))+ ((x-3)/(x+2)) = (7)/(5) Let's take that first part: (x)/(5x+10) In the denominator, factor out "5" That leaves that part as: x/(5(x+2)) So now we have: ((x)/5(x+2)) + ((x-3)/(x+2)) = 7/5 We can multiply BOTH

*asked by jasmine20 on April 19, 2007* -
## Bus. Math

How much money should be deposited each year for 30 years at 3% to accumulate $1000,000? I find that an EXCEL spreadsheet is very helpful for these kinds of problems. If one deposits an amount P, growing for 30 years, the amount will grow to P*(1.03)^30.

*asked by julie on November 2, 2006* -
## Physics ( Thickness of a Spherical Shell)

Aluminum floater: A spherical shell with an outer radius R=2 cm is made of aluminum (mass density of Al is 2.7 g/cm3). How thick is the shell if the average density of the spherical object is exactly 0.5 g/cm3 ? Assume there is a vacuum in the hollow

*asked by JC on September 9, 2015* -
## Precalc

A boat that travels at 16 knots in calm water is sailing across a current of 3 knots on a river 250 m wide. The boat makes an angle of 35 degrees with the current heading into the current. Find the resultant velocity of the boat. How far upstream is the

*asked by Natalie on April 11, 2008* -
## Chemistry

A 25.0 g sample of iron at 398K is placed in a styrofoam cup containing 25.0 mL of water at 298K. Assuming that no heat is lost outside the cup, what will the final temperature of the water be? What will the final temperature of the iron be? I set them

*asked by Merp on April 25, 2016*

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