Wednesday

February 22, 2017
Total # Posts: 5,700

**chemistry**

What is the mass of 225ml of a liquid that has a density of 0.880g/ml

*September 4, 2015*

**Physical science**

A 70-kg man and a 50-kg woman are in a 60-kg boat when its motor fails. The man dives into the water with a horizontal speed of 3m/s in order to swim ashore. If he changes his mind, can he swim back to the boat if his swimming speed is 1m/s? If not, can the woman change the ...

*September 4, 2015*

**Statistics**

A list of transactions contains 100 numbers: 60 gains and 40 losses. The gains are positive numbers and the the losses are negative numbers. The units are thousands of dollars. For the 60 gains, the average is 18 and the SD is 7.5. For the losses the average is -20 and the SD...

*September 3, 2015*

**Chemistry**

I'm having trouble with knowing the relations between quantum numbers n, l, m(sub l), and m(sub s). Could you please explain?

*September 3, 2015*

**U.S. History**

I have some more. According to those who supported U.S. expansion, what would be 3 benefits of U.S. imperialism?

*September 2, 2015*

**U.S. History**

Can someone help me answer this questions? Why did a totalitarian regime rise in Germany in the 1930s? Explain at least three factors that led many Germans to embrace a totalitarian regime.

*September 2, 2015*

**math**

the following are the probabilities of selecting iteams from a bag (candy: grape ?, cherry 3/8, apple 1/4). What is the probability of selecting grape?

*September 1, 2015*

**Algbrea**

sapphire island is open 7 days a week the park has 8 ticket booth and each booth has a ticket seller from 10:00 AM to 5:00 PM on average ticket sellers work 30 hours per week write an equation that can be used to find t the minimum number of ticket sellers the park needs

*August 30, 2015*

**history**

Ok thanks

*August 30, 2015*

**history**

I still I don't understand so did the Europeans perceive themselves as the only people who had good military and was above everyone else.

*August 30, 2015*

**history**

how did the Europeans perceive themselves in the world during the1450s through the 1700s

*August 30, 2015*

**math**

Chicken was on sale for $7.95 per pound. Laurie bought small package that weighed 0.8 pound. How much did Laurie pay for the chicken?

*August 27, 2015*

**Math Functions**

Find the inverse function of f(x)=5 + \sqrt[3]{x}. so f^-1(x) equals...? I'm not sure how to approach this problem.

*August 26, 2015*

**math**

how do you turn a $13.75 into an improper fraction

*August 23, 2015*

**Chemistry**

You have 75.0 mL of a 2.50 M solution of Na2CrO4 (aq). You also have 125 mL of a 2.15 M solution of AgNO3 (aq). Calculate the concentration of NO3 when the two solutions are added together.

*August 22, 2015*

**Math**

No, I don't. I just didn't think you should subtract the 1/4 from the first 6 months.

*August 22, 2015*

**Math**

When Bruce started bowling, he won 1/4 of the games he played. Within six months, he was winning 7/16 of his games. If he improves at the same rate, what fraction of his games should he expect to win after another six months? I subtracted the 1/4 from 7/16 and came up with 3/...

*August 22, 2015*

**physics**

A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 99-kg laser sensor which measures the thickness of the ice (see the drawing). The helicopter and the sensor move only in the horizontal direction and have a horizontal acceleration of ...

*August 14, 2015*

**physics**

A 14.4-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 66.9 N and is directed at an angle of 32 ° above the horizontal. Determine the coefficient of kinetic friction

*August 14, 2015*

**Math**

sin(arctan(-3pi/4))

*August 10, 2015*

**Pre calc**

You are standing at the peak of a mountain that is 14000 feet above sea level. The angle of depression from this peak to a nearby smaller peak is 4°. On your map, these two peaks are represented by points that are 1 inch apart. If each inch on your map represents 1.2 miles...

*August 9, 2015*

**physics**

A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +3.9 m/s and ax = +1.2 m/s2. The y components of the puck's initial velocity and acceleration are ...

*August 7, 2015*

**physics**

Suppose a car is traveling at +15.0 m/s, and the driver sees a traffic light turn red. After 0.405 s has elapsed (the reaction time), the driver applies the brakes, and the car decelerates at 6.00 m/s2. What is the stopping distance of the car, as measured from the point where...

*August 7, 2015*

**physics**

(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 10.5 m/s when going down a slope for 3.18 s? (b) How far does the skier travel in this time?

*August 7, 2015*

**physics**

Two identical pellet guns are fired simultaneously from the edge of a cliff. These guns impart an initial speed of 44.7 m/s to each pellet. Gun A is fired straight upward, with the pellet going up and then falling back down, eventually hitting the ground beneath the cliff. Gun...

*August 6, 2015*

**physics**

A car is traveling at a constant speed of 25.5 m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from the ramp. The second car starts from rest and has a constant acceleration. What acceleration must it maintain, so that the two...

*August 6, 2015*

**math**

I really need help to find the answer to this question below. If possible, please show every step of the way in a detailed form so i can understand, it takes me a while to fully comprehend whats being done. Thank you so much. QUESTION: the data shown model the growth of a ...

*July 27, 2015*

**Math**

There's a question I've been having difficulty solving, and I would really appreciate if you can show he steps to how I can achieve the answer. QUESTION: The numbers 1, 4, 10, 20, and 35 are called tetrahedral numbers because they are related to a four sided shape ...

*July 27, 2015*

**Math**

There's a question I've been having difficulty solving, and I would really appreciate it if you can explain to me how I can achieve the answer. question:an above ground swimming pool in the shape of a cylinder, with diameter 5m, is filled at a constant rate to a depth ...

*July 25, 2015*

**Math**

How do you multiply 2 square roots?

*July 25, 2015*

**English**

Hi so I read the book The Impossible Rescue by Martin Sandler and I need 3 main ideas and 3 pieces of evidence for each can someone help me I am having a really hard time?

*July 20, 2015*

**Chemistry**

25cm^3 H2SO4 is neutralized by 40 cm^3 of 0.03 mol/dm^3 KOH. What is the molar concentration of H2SO4?

*July 20, 2015*

**Math**

Begins*

*July 18, 2015*

**Math**

Write an equation and for each sine function described. Each cycle behind at the origin. a) amplitude=6, period=180 b) amplitude=2, period=540

*July 18, 2015*

**Math**

Thank you so much! This was so helpful! Really appreciate it

*July 18, 2015*

**Math**

A Ferris wheel has a radius of 35m and starts at 2m above the ground. It rotates once every 53 second. a) determine the cosine equation of the graph, if the rider gets on at the lowest point. b) what is the height of the rider at 81 seconds?

*July 18, 2015*

**Physics**

What is the angle between the vectors A and B if vector A multiplied by vector B = 0.5 AB

*July 15, 2015*

**Chemistry**

If 32.6 mL of 0.240 M oxalic acid are required to titrate 48.9 mL of unknown sodium hydroxide: How many moles of acid are used in the titration? How many moles of base are used in the titration? What is the molarity of the unknown NaOh base? Please help I do not know where to ...

*July 15, 2015*

**environment**

hey, i have been selected to attend a training abroad but have to pay for travel myself. I need some good place to get travel grants for this. does anyone know where I can apply?

*July 14, 2015*

**st joan of arc**

Math from a spot 60 ft from the base of a building the angle of elevation is 48 degrees and the of elevation of the top of the antenna is 56 degrees. What is the height of the building? What is the height of the antenna?

*July 10, 2015*

**obamoruf math**

find the permeter of a parallelogram whose base is 6cm and side 5cm

*July 10, 2015*

**english**

COMMUNITY EAST HOSPITAL To call a Patient Dial Direct 395-8 Plus Room Number EMERGENCY ROOM……………….(NNN) NNN-NNNN/p> Main Number 1700 W 7th………………………395-8100 Billing Department…………...

*July 9, 2015*

**Science**

mg +2Hcl --MgCl2. + h2 Calculate minimum volume of 0.1ml\L Please help

*June 19, 2015*

**Science**

mg +2Hcl --MgCl2. + h2 Calculate minimum volume of 0.1ml\L Please help

*June 19, 2015*

**Physics**

Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 21.0 kg and box B has mass 8.0 kg . A horizontal force of 100N is exerted on box A. What is the magnitude of the force that box A exerts on box B?

*June 15, 2015*

**Physics**

A grasshopper leaps into the air from the edge of a cliff at a 50 degree angle. He reaches a maximum height 6.74 cm above the top of the cliff and travels a total horizontal distance of 1.06 m. How tall is the cliff and what is the initial speed of the grasshopper?

*June 12, 2015*

**algebra**

what percentage is 90th percentile?

*May 28, 2015*

**1st grade math**

Draw a quick picture for 26+8. Show how to make a ten to model the number of apples a different way. Write a new number sentence I did 26 + 8 apples .. I drew 8 apples = 34 then I put 7+ 3 = 10 ?

*May 27, 2015*

**1 st grade math**

Can you help with the other one I posted ?

*May 27, 2015*

**1 st grade math**

draw a new quick picture for pablo's apples. show how to make a ten to model the number of apples a different way. write a new number sentence. 4 + 6 = 10 ?

*May 27, 2015*

**physics**

At what height above the ground must a body of mass 10kg be situated in order to have potential energy in value to the kinetic energy possessed by another body of mass 10kg moving with a velocity of 10m-s

*May 25, 2015*

**English plz help quick**

I am pretty sure this is a metaphor

*May 21, 2015*

**Maths**

Let f(x)= 2x+1 and g(x) = 3x^2-4 find: a) f^-1 b) gof (-2) c) fog (x)

*May 16, 2015*

**Algebra please help**

4 is c for connexus students trust me

*May 14, 2015*

**Calculus**

Problem: Find the general solution to the following differential equation: x y' +x = ycos(1/x) I assume that you do separation of variables here: x(dy/dx) +x = ycos(1/x) xdy+x = (ycos(1/x)) dx ....? I'm stuck on how to simplify this. Thank you!

*May 12, 2015*

**Science**

Use the word INDEX OF REFRACTION in a sentence?

*May 11, 2015*

**Science**

Use the word ANGLE OF REFRACTION in a sentence?

*May 11, 2015*

**ela**

What does this mean? 'Immigrants have changed america,but america has also changed them"

*May 9, 2015*

**ela**

Immigrants have changes america, but america has also changed them what does this mean you can read the article Holding on to heritage before it slips away Thanks

*May 9, 2015*

**Molecular Biology**

How large is the genome of Alcaligenes faecalis?

*May 9, 2015*

**Science**

Water molecules are smaller and have less mass than alcohol and oil molecules. Explain why water is more dense than alcohol and oil.

*May 8, 2015*

**Calculus**

The function g is defined for x>0 with g(1)=2, g'(x)=sin(x+1/x), and g"(x)=(1-1/x^2)cos(x+1/x). A. Find all values of x in the interval 0.12<=x<=1 at which the graph of g has a horizontal tangent line. B. On what subintervals of (0.12,1), if any, is the graph...

*May 7, 2015*

**Calculus**

Consider a differentiable function f having domain all positive real numbers, and for which it is known that f'(x)=(4-x)x^-3 for x>0. A. Find the x-coordinate of the critical point of f. Determine whether the point is a relative maximum, a relative minimum, or neither ...

*May 7, 2015*

**LA**

Can someone help me? During her time in the Secret Annex, Anne demonstrates that she is a unique and remarkable young person with many dimensions to her character. In an essay, explain what makes Anne a complex character. Include details from The Diary of Anne Frank, Act 1 and...

*May 7, 2015*

**maths**

12 1/2

*May 7, 2015*

**Physics**

A sled mass of 40 kg is pulled along a snow covered surface. The coefficient of static friction is 0.40 and the coefficient of sliding friction is 0.25 a) what force is needed to start the sled moving? b)what force is needed to start to keep the sled moving at a constant speed...

*May 6, 2015*

**Physics**

A sled mass of 40 kg is pulled along a snow covered surface. The coefficient of static friction is 0.40 and the coefficient of sliding friction is 0.25 a) what force is needed to start the sled moving? b)what force is needed to start to keep the sled moving at a constant speed...

*May 6, 2015*

**math**

After spending 80% of her money Lei has 100.00 left...How much was her money before?

*May 5, 2015*

**Math**

ok thanks

*May 5, 2015*

**Math**

2(-8-2+2v+6v) do u distribute?

*May 5, 2015*

**Math**

thanks I get it now. Can u help me with another one? ms. sue

*May 5, 2015*

**Math**

-9(8+4v)

*May 5, 2015*

**Chemistry**

I'm assuming for the first question you meant molar concentration.. if this is the case use the formula c=n/v (or concentration equals mass divided by volume) so you would first find the molar mass of sodium bicarbonate (i'm assuming you know how to do that) and use ...

*May 4, 2015*

**Math**

You draw five cards from a standard deck of 52 cards. P(heart) = 4/5 (fraction). What type of probability is illustrated and why? Theoretical; the result is based on the number of possible outcomes** Theoretical; the result is found by repeating an experiment Experimental; the...

*May 3, 2015*

**maths**

so 336?

*May 3, 2015*

**maths**

simplify 8C5 The "C" stands for combinations ( like combinations and permutations )

*May 3, 2015*

**ANT101**

No, you don't need to include a citation.

*May 1, 2015*

**Advanced Functions**

Prove (sin4x)/(1-cos4x) = cotx - 1/2(cscxsecx) Please help me get started on this question... I'm at a lost as for what to do first....

*April 30, 2015*

**chemistry**

I think you use the formula q=mc(delta)t with q being the amount of energy added, m being the mass of water,c being the specific heat capacity of water which is 4.18J/g*degrees Celsius and then you would solve for delta t which is your change in temperature... hope this helps ...

*April 30, 2015*

**Math**

thanks so much!! :) ;) @ms. sue

*April 30, 2015*

**Math**

150 @ms sue

*April 30, 2015*

**Math**

Anna saved $20 in a jar each month for 2 1/2 years. She spent 75% of her savings on a computer. How much money did Anna have left in the jar?

*April 30, 2015*

**Math Please help Ms. Sue**

Thank you for your help! (=

*April 29, 2015*

**Math Please help Ms. Sue**

How can you determine if the given lines are perpendicular? Line 1: (-1,3) and (3,-3) Line 2: (-3,0) and (3,3) A)determine if they have slopes with opposite values*** B)determine if they have the same slope C)determine if the product of their slope is 1 D)determine if the ...

*April 29, 2015*

**Science Please help Ms. Sue!!!**

Which of the following does not reduce water pollution? a) cleaning up oil and gasoline spills. b) reducing pollutants such as pesticides and fertilizers. c) increasing the use of gasoline.*** d) properly treating waste water Can you please check my answer?

*April 29, 2015*

**Math**

A number cube is rolled 160 times. The number 2 comes up 39 times. what is the experimental probability of rolling a 2? What is the theoretical probability of rolling a 2? A. 39/160 ; 1/80 b. 1/6 ; 39/160 C. 39/160 ; 1/6 D. 121/160; 1/6 My answer is B. Is this right????

*April 29, 2015*

**History**

. Imagine that you are a British industrial worker who fell asleep in 1833 and awoke mysteriously eighty years later, in 1913. What, if anything, is still recognizable from your own life?

*April 28, 2015*

**Social Studies I NEED HELP PLEASE!!!**

Whoever the first person was who helped me, thanks! I got them both right! (=

*April 27, 2015*

**Social Studies I NEED HELP PLEASE!!!**

Oh, yes! I didn't catch that!

*April 27, 2015*

**Social Studies I NEED HELP PLEASE!!!**

Thanks! (=

*April 27, 2015*

**Social Studies I NEED HELP PLEASE!!!**

I think 1 is b and 2 is d, but can someone please check my answers?

*April 27, 2015*

**Social Studies I NEED HELP PLEASE!!!**

Which best describes how land ownership changed after Ukrainian independence? A. land ownership has stayed the same B. lands formerly owned by the state have been privatized. C. lands formerly owned by individuals have been seized by the state D. communities own and work farm ...

*April 27, 2015*

**Calculus**

People are entering a zoo at the rate of 100e^t+75t people per hour where t is the amount of time the zoo has been open on that day measured in hours. If the doors are open at 9:00 AM, how many hundreds of people have entered the zoo at 11:40 AM? (Nearest integer)

*April 26, 2015*

**Civics**

12. Which one of the following is an example of an entitlement? A. Freedom of speech B. Receiving Social Security C. The right to vote D. Serving in the military B?

*April 25, 2015*

**Civics**

11. To become a citizen of the United States, you must A. file a request form in a federal court. B. pass an English and government test. C. have lived in the United States for at least six months. D. be at least 21 years old. B?

*April 25, 2015*

**Civics**

10. Which of these statements about the Cuban Missile Crisis is true? A. President Kennedy removed nuclear missiles from Turkey to resolve the crisis. B. Fidel Castro's government had manufactured guided missiles. C. President Kennedy called Nikita Khrushchev on the ...

*April 25, 2015*

**Civics**

B James Madison was correct.

*April 25, 2015*

**Civics**

I've looked up Madison and I think I'll agree on this answer than I would Washington because for Washington it doesn't say that he was known as a federalist.

*April 25, 2015*

**Civics**

Ohh then I don't know. For sure I know it can't be George Washington and not Abraham Lincoln.

*April 25, 2015*

**Civics**

5. You don't really approve of the idea of political parties. However, you're known as a Federalist and are soon associated with that party. Chances are good that your name is A. Thomas Jefferson. B. James Madison. C. Abraham Lincoln. D. George Washington. A?

*April 25, 2015*