Friday

January 30, 2015

January 30, 2015

Total # Posts: 76,914

**MATHAMATICS**

IN A GP THE 5TH AND 8TH IS 24 AND 72 FIND THE 6TERM
*November 26, 2014*

**Calculus**

i plugged in 11/3 x^3 -1/4 but the answer wasnt correct
*November 26, 2014*

**Calculus**

solve the differential equation dy / dx = 11x^2y^2 with the condition that y(0) = 4 The solution to the equation is y =
*November 26, 2014*

**analytic**

One line passes through the points (1,9) and (2,6), and another line passes through (3,3) and (-1,5). Determine the acute angle between the two lines.
*November 26, 2014*

**analytic**

One line passes through the points (1,9) and (2,6), and another line passes through (3,3) and (-1,5). Determine the acute angle between the two lines.
*November 26, 2014*

**physics **

a projectile is fired from the vertical tube mounted on the vehicle which is travelling at the constant speed of 30kph. the projectile leaves the tube with a velocity of 20m/s relative to the tube.neglecting air resistance.
*November 26, 2014*

**chemistry----please help**

calculate the molar hydroxide ion concentration of each of the following solutions given the pH 4.53. Answer should be for OH-. Please show me how to do this in step by step I tried putting in 10 xy-4.53= 0.000029512 which is 3.0 * 10^-5 It says that the answer is wrong.
*November 25, 2014*

**Chemistry**

OH=9.47 -log= 0.976349979 is this correct
*November 25, 2014*

**Chemistry**

calculate the molar hydroxide ion concentration of each of the following solutions given the pH 4.53. Answer should be for OH-. Please show me how to do this in step by step
*November 25, 2014*

**Science 1 easy question!!!!**

Is K^+1 and F^-1 an ionic bond? My answer: yes
*November 25, 2014*

**Maths**

Thank You ;)
*November 25, 2014*

**Maths**

In the village school the ratio to boys to girls is 5:6. there are 175 boys. how many girls. please show me full working out but don't give me the answer as I want to find it out for myself. I just need to know how to do it. Thank you
*November 25, 2014*

**Chemistry**

Given the molar concentration of hydroxide ion, calculate the concentration of hydrogen ion. [OH-]=0.0010 Can someone please help me with this process. Thanks
*November 25, 2014*

**Chemistry**

Determine the acid and base that were neutralized to produce each of the following salts. Li2CO3 (aq). I don't understand how to solve this.
*November 25, 2014*

**Chemistry**

Given the molar concentration of hydrogen ion, calculate the concentration of hydroxide ion [H+]=7.9*10-7
*November 25, 2014*

**1 Math question**

Estimate $6.56 + $13.02 using front-end estimation. about $19.60 about $18.60 about $20.10 *** about $17.10
*November 25, 2014*

**Biology**

In what form of energy does energy from sunlight end up after photosynthesis and cell respiration?
*November 25, 2014*

**math**

a 154 lb person burns 420calories per hour riding an exercise bicycle at a rate of 15 mi/hr write a function rule to represent the total calories burned over time by that person.
*November 25, 2014*

**algebra**

Tarot cards are used for telling fortunes, and in a reading, the arrangement of the cards is as important as the cards themselves. How many different readings are possible if three cards are selected from a set of seven Tarot cards?
*November 25, 2014*

**physics**

a convertible travels down a straight, level road at a slow speed of 13 km/h. A person in the car throws a ball with a speed of 3.6 m/s forward at an angle of 30 degrees to the horizontal. Where is the car when the ball lands?
*November 25, 2014*

**maths**

Average weight 0f 6 balls is 6kg.average weight of 7balls is 7kg what's the weight of 7th ball
*November 25, 2014*

**Algebra**

I can find the finite differences, but how do I find the number of birds in July? owl.bcpnet. net/Algebra%202/ch6/section09/problem_solving.pdf
*November 25, 2014*

**business math **

Molly Ellen, bookkeeper for Keystone Company, forgot to send in the payroll taxes due on April 15. She sent the payment November 8. The IRS sent her a penalty charge of 8.80% simple interest on the unpaid taxes of $3,600. Calculate the penalty. (Remember that the government ...
*November 25, 2014*

**Spanish**

This is really long and I'm behind on my homework so I couldn't read it all I'd change the first line to Pablo Neruda es un famoso poeta de Chile. Hope it helped :)
*November 24, 2014*

**Primary Sources Search Help**

I'm looking for primary sources from when Sacagawea was alive that relate to her in some way Otherwise any tips for finding primary sources?
*November 24, 2014*

**history/engllish-thesis**

I also have- Sacagawea played a significant role in the Corps of Discovery journey, making her one of America's most influential females in history.
*November 24, 2014*

**history/engllish-thesis**

I need help writing a thesis for my history day project, my person is Sacagawea and this years theme is leaders and their short and long term legacies. I don't exactly know where to start. Sacagawea has played a big role in the discovery of Louisisana territory, making her...
*November 24, 2014*

**chemistry-naming **

How do I name the following- C3H8? (the numbers are supposed to be subscripts) KCl?
*November 24, 2014*

**Science**

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each tube). The final ...
*November 24, 2014*

**Microbiology**

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each tube). The final ...
*November 24, 2014*

**Chemistry**

I think this is another 2-fold dilution where the answers are 16, 8, 4, and 2, but I'm not sure.
*November 24, 2014*

**Chemistry**

2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each tube). The final ...
*November 24, 2014*

**Algebra**

99 inch pipe is cut into two pieces. One is two times the length of the other. Find the lengths of the two pieces
*November 24, 2014*

**Math - ratio**

Mr. Rahim had the same amount of money in his three bank accounts at first. He deposited $44 into account b and $ 80 into account c. In the end, the ratio of the amount of money in account a to the amount of money in account c was 2:7. How much money was there in account b in ...
*November 24, 2014*

**Math**

A worker uses 4gray tiles for every 5blue tile That he uses .if he uses 60gray tiles how many blue tiles does he use
*November 24, 2014*

**math**

uhm, how do you get it though, but the answer is 41.4
*November 24, 2014*

**math**

A cone is made from the figure shown by joining the straight edges and securing them with tape, calculate the angle of inclination, to the nearest tenth of a degree, for the side of the cone.
*November 24, 2014*

**physics**

on the surface of planet y, which has a mass of 4.38 x10^24 kg, an object has a weight of 50.0 N and a mass of 30.0 kg. What is the radius of this planet?
*November 24, 2014*

**English**

My teammates and___ practice every day after classes are over. a.I b.me c.my d.us I am think a ___ said in our orientation that we much make our decisions about how we are going to make a difference. A.It B.Our Leader C. They D. Them I am think B ____of my friends believe__ ...
*November 24, 2014*

** ratios and proportional relationships **

if a tiger eat food that weights up to 15% of its body weight and it eats 75 pounds of food how much does the tiger weigh
*November 24, 2014*

**Math**

As a savings plan for college, when their son Bill was born, the Johnson's deposited $10,000 in an account paying 4% compounded quarterly. How much is this account when Bill is 18 years old?
*November 24, 2014*

**Calculus**

What does y'' mean in calculus? Is there a word for it? Also is there a word for f'(x)? Thanks.
*November 24, 2014*

**math**

Jane had $7 and her sister had $2. Their parents gave each of them an equal amount of money. Then, Jane had twice as much money as her sister. How much money did their parents give each of them
*November 24, 2014*

**grammar**

Which is a similie? A) riding like the wind or B) looked like they had come from far
*November 24, 2014*

**government**

three types of political party systems and how they affect governing
*November 24, 2014*

**Spanish 1 question**

How are lunch traditions changing in the Spanish-speaking world, and why?
*November 24, 2014*

**Spanish**

What is a bodegón? What is its significance?
*November 24, 2014*

**Pre-Calc/Trig**

okay thank you
*November 24, 2014*

**Pre-Calc/Trig**

is the integer n odd or even, explain
*November 24, 2014*

**chemistry**

If you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? C2H4 + 3 O2 2 CO2 + 2 H2O, H = -1410 kJ
*November 24, 2014*

**statistics**

from the following list of numbers of discharges each day in september, compute the mean, mode, and range.
*November 24, 2014*

**physics**

is it possible to a have a percentage difference of zero in physics
*November 24, 2014*

**accounting**

On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The cost of the equipment...
*November 24, 2014*

**chemistry**

0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it
*November 24, 2014*

**business math**

The weekly payroll of Abkar Hardware includes 19 employees who earn $280. How much is the employer's share of total social security and Medicare taxes for the first quarter of the year?
*November 24, 2014*

**Pre-Calc/Trig**

Help me please, I don't understand this write using exponential notation √ 36* 3√ 64 oh and 3 is an exponent
*November 24, 2014*

**physics**

n=1, L=0, m=0 n=2, L=0, m=0 L=1, m= -1, 0, 1 n =3, L=0, m=0 L=1, m= -1, 0, 1 L=2 , m=-2,-1,0,1,2 n =4 L=0, m=0 L=1, m= -1, 0, 1 L=2, m=-2,-1,0,1,2 L=3, m=-3,-2,-1,0,1,2,3 n=5, L=0, m=0 L=1, m= -1, 0, 1 L=2, m=-2,-1,0,1,2 L=3, m=-3,-2,-1,0,1,2,3 L=4, m=-4,-3,-2,-1,0,1,2,3,4 The...
*November 24, 2014*

**physics**

it takes about 560 kilowatts to run a diesel locomotive at speed around 180km/h.Magnetically levitated trains(mag levs) on the other hand require less power because the magnetic levitation eliminates energy loss to friction.The worst maglev system requires 270 watts to ...
*November 24, 2014*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*November 24, 2014*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*November 24, 2014*

**Math**

Given TriangleABC with a = 9, b = 15, and m<A= 28 degrees, find the number of distinct solutions. I got two solutions. Not sure if I am correct though.
*November 24, 2014*

**Math**

Determine the linear velocity of an object with an angular velocity of 8.1 radians per second at a distance of 10 centimeters from the center. Use pi. Round the answer to the nearest tenth. I got 47, is this correct?
*November 24, 2014*

**math**

Ron will have 10 dimes
*November 24, 2014*

**statistics**

your medical terminology instructor listed the following grades for the class out of a 75-point: 33,34,43,45,45,54,59,60,62,64,66,67,68, 67,68,68,69,70,70
*November 24, 2014*

**physics**

A(n) 1949.1 kg car is coasting along a level road at 22.9 m/s. A constant braking force is applied, such that the car is stopped in a distance of 74.6 m. What is the magnitude of the braking force? Answer in units of N
*November 23, 2014*

**chemistry**

Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 0.140M in propanoic acid and 0.120M in potassium propanoate
*November 23, 2014*

**physics**

It's due in 5 minutes just tell me the answer.
*November 23, 2014*

**physics**

A 1.2kg lead ball is launched off a cliff top at 16m/s at an angle of 20 degrees above the horizontal. The height of the horizontal is 15m. Determine the net force acting on the lead ball that caused the ball to drop 4.0m from point P.
*November 23, 2014*

**chem**

If a sample of gas has a volume of 8.20
*November 23, 2014*

**math**

(1/3)/(7/9)=0.428... 9/21=0.428... yes this is correct! :)
*November 23, 2014*

**Chemistry**

If 120. grams of KClO3 reacts, how many grams of oxygen are produced?
*November 23, 2014*

**Probability**

You have a blind date with a physics major. From your social networking experience, you know that 10% of physics majors are immature, 50% are narcissistic, and 90% are boring. Assume that immaturity, narcissism, and boringness are independent events. Calculate the probability ...
*November 23, 2014*

**statistics**

You have a face-to-face statistics class in the traditional classroom setting. There are 25 males and 45 females enrolled. You’re the instructor so you like to arrive in the classroom before the first students arrive. What is the probability that the first student who ...
*November 23, 2014*

**statistics**

An introductory psychology class has 9 freshman males, 15 freshman females, 8 sophomore males, and 12 sophomore females. If one student is randomly selected from this class, what is the probability of selecting a female? Round to the nearest hundredths place if a fraction
*November 23, 2014*

**Geometry**

Emalee, there is no picture to go with this question. Please share so I can help you!
*November 23, 2014*

**physics**

A sled on ice moves in the ways described in the questions below. Friction is so small that it can be ignored. A person wearing spiked shoes standing on the ice can apply a force to the sled and push it along the ice.Which force would keep the sled moving toward the right and ...
*November 23, 2014*

**Chemistry**

Draw all of the possible alkyne isomers of CH≡CCH2CH2CH2CH3.
*November 23, 2014*

**Health And Physical Ed**

All of them
*November 23, 2014*

**physics**

Air at 1 atm is inside a cylinder 17.9 cm in radius and 17.9 cm in length that sits on a table. The top of the cylinder is sealed with a movable piston. A 24.1-kg block is dropped onto the piston. a) From what height above the piston must the block be dropped to compress the ...
*November 23, 2014*

**American Government**

When Congress prepares a budget
*November 23, 2014*

**Mechanical Behavior of Materials**

400
*November 23, 2014*

**physics. I waited over two days for response**

An 800kg police boat slows down uniformly from 50km/h (E) to 20km/h(E) as it enters a harbour. If the boat slows down over a 30m distance, what is the force of friction of the boat? (Hint: you will need to convert the velocities into m/s) please show your work.
*November 23, 2014*

**Calculus**

Use Riemann sums and limits to compute the area bounded by f(x) = 10x+9 and the x axis between x=10 to x =5 The area is = to
*November 23, 2014*

**maths**

so 4n-1 9th term would be 35 and 10th term would be 39. The sum is 74. I'm in grade four. I just figured it out.
*November 23, 2014*

**Science PLEASE HELP**

How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
*November 23, 2014*

**Science**

How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
*November 23, 2014*

**Stats**

21.4 A student survey. Tonya wants to estimate what proportion of the students in her dormitory like the dorm food. She interviews an SRS of 50 of the 175 students living in the dormitory. She finds that 14 think the dorm food is good.
*November 23, 2014*

**physics**

Keep the initial velocity fixed at 50 m/s. Perform the experiment for each of the following angles:
*November 23, 2014*

**Chemistry**

A student was given a 2.45 g of impure potassium sulfate (K2SO4) sample. He dissolved this sample in 100 mL of water first and then added some barium chloride (BaCl2) solution. A 2.15 g of BaSO4 precipitate was obtained at the end of the reaction. What is the percent purity of...
*November 22, 2014*

**physics**

Consider a very small hole in the bottom of a tank that is 17.0 cm in diameter and filled with water to a height of 90.0 cm. Find the speed at which the water exits the tank through the hole. A) 48.3 m/s B) 44.1 m/s C) 17.64 m/s D) 4.20 m/s
*November 22, 2014*

**physics**

When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now read? The density of ...
*November 22, 2014*

**Excel**

I know how to insert error bars in the bar graph on Google spreadsheet, but for some reason I couldn't, due to the drop-drown of the series section consisting of only column 1 and not the other.How can i fix this problem?
*November 22, 2014*

**Question**

That not helping me
*November 22, 2014*

**Question**

Describe what children while children playing would learn in a block center
*November 22, 2014*

**Chemistry**

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas -Controlled: Temp of...
*November 22, 2014*

**Chemistry**

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas -Controlled: Temp of...
*November 22, 2014*

**Biology**

Would glucose be considered a reactant in glycolysis? Also, some sites are saying that 4 ADP molecules are also reactants, but I don't understand how?
*November 22, 2014*

**Physics**

A 4.0-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? The density of iron is 7860 kg/m3 and that of water is 1000 kg/m3. A) 34 N B) 2.5 N C) 24 N D) 40 N E) 20 N
*November 22, 2014*

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