Thursday

February 23, 2017
Total # Posts: 3,399

**FLVs**

A man with a waist measurement of 32 inches and a BMI of 22 is considered:

*February 3, 2017*

**Math**

chandra has 3 liters of a 28% solution of sodium hydroxide in a container. What is the amount and concentration of sodium peroxide solution she must add to this in order to end up with 7 liters of 48% solution?

*February 2, 2017*

**Math**

Leslie used more than a 1/2 cup but less than 1 whole cup of flour for recipe. what fraction of a cup Leslie used. Explain.

*February 2, 2017*

**science**

I have completed a back titration with an antacid tablet weighing 1.25 mg and 0.1494 M concentration of HCL (100 mL was added) and the concentration of NaOH is 0.1422 M. Determine the concentration of HCl remaining in the volumetric flask

*January 30, 2017*

**Pre Cal 12**

At what rate of interest would an investment have to be paid for an initial $900 to grow into $1400 in 12 years if the investment was compounded quarterly?

*January 28, 2017*

**Trig**

4x+y=?0, x?0 help finding Sin, Cos, Tan for this

*January 26, 2017*

**Trig**

can sec ? = negative 5

*January 26, 2017*

**trig**

sin, cos, and tan for ?5x + y =?0, x is less than or equal to 0

*January 26, 2017*

**Trig**

thank you!

*January 26, 2017*

**Trig**

Find the approximate value of cot ??, given that csc ?equals=3.5891420 and ? is in quadrant I.

*January 26, 2017*

**Math**

Shawn needs 190 liters of a solution that has a concentration of 18 g/ml for the manufacture of computer parts. Shawn has an unlimited supply of a solution with a concentration of 37 g/ml. Using the Formula C1*V1=C2*V2 answer the following ...

*January 25, 2017*

**algebra**

102 is the product of Chau's height and 6

*January 25, 2017*

**Math**

11+6=19-

*January 25, 2017*

**Science**

Cutting down trees for -------------- can increase soil erosion. It fill in the blank. four grade science I do not know it.

*January 4, 2017*

** 4 th grade science**

Cutting down trees for ---------- can increase soil erosion. can some one help me please with this. fill in the blank.

*January 4, 2017*

**Science**

4th grade Most processes change land slowly,but people can change the land

*January 4, 2017*

**Science**

4th Grade Most processes change land slowly, but people can change the land----------------- What the answer

*January 4, 2017*

**Math**

Something travels 25 meters in one minute, what does it travel in kilometers in one minute.

*December 28, 2016*

**Math**

You have the number 1,000,000,000 (one billion). What is one hundredth of that number?

*December 27, 2016*

**Math**

Which of the following expressions should be placed in each set of parentheses below in order to solve the equation by completing the square? x2+6x+___=15+____ a.3/2 b.3 c.6 d.9

*December 27, 2016*

**Grammar**

They love to go to the pool. Their favorite thing to do is swim laps. He likes to do the backstroke. He collects all the posters of famous swimmers in his bedroom. He likes to do the breaststroke. He has collected many autographed pictures of Olympic swimmers. Sometimes he ...

*December 18, 2016*

**Grammar**

Re-write the paragraphs adding pronouns such as "he," "they," etc. Tim and Paul love to go to the pool. Tim and Paul's favorite thing to do is swim laps. Tim likes to do the backstroke. Tim collects all the posters of famous swimmers in his bedroom. Tim...

*December 18, 2016*

**American Government**

Oops. XD. I meant LA.

*December 16, 2016*

**American Government**

These following questions are the only ones on the test I do not understand! Please help!!!!! :/ 6. Which is the BEST paraphrase of the first stanza of “The Olympic Swimmer”? A. Athletes from across the globe train to compete in the Olympics, but only one can win. B...

*December 16, 2016*

**Physics**

Problem: A person has a reasonable chance of surviving an automobile crash if the deceleration is no more than 30 "g's. Part A: Calculate the magnitude of the force on a 71-kg person accelerating at this rate. Answer=> F= 2.09x10^4 N Part B: What distance is ...

*December 15, 2016*

**Algebra**

Which equation is the equation of a line that passes through (-10,3) and is perpendicular to y=5x-7 A)y=5x+53***** B)y=-1/5x-7 C)y=-1/5x+1 D)y=1/5x+5 Am I correct Please explain

*December 9, 2016*

**Geometry**

In the figure, (AC) ??(AB). Find the value of y in terms of x. If the vertex angle of an isosceles triangle is y and the exterior angle ABE is 3x+20. Answer: y= 6x-140 Pls explain it to me how they get the answer.

*December 9, 2016*

**Geometry**

Oh ok, it makes sense now. Thank you very much for your help!

*December 8, 2016*

**Geometry**

Point A(-5,-40) is rotated 90 degrees counterclockwise about the point (-2,-3). What are the coordinate of A' after the rotation? Answer: A'(-1,-6) Please explain how they got the answer.

*December 8, 2016*

**Algebra**

A baseball player hits a foul ball straight up in the air from a height of 4 feet off the ground with an initial velocity of 85 feet per second. When is the ball 110 feet off the ground?

*December 7, 2016*

**Algebra 1B**

Aww. Thanks Guys! I really appreiciate it.

*December 2, 2016*

**Algebra 1B**

24. Solve the system of equations algebraically. Show all of your steps. Y = x^2 + 2x and y = 3x + 20. Btw this is a workpad problem. I just need to be put in the right direction, on how to do it.

*December 2, 2016*

**AP Physics**

Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is ?k = 0.27 and the blocks are ...

*November 29, 2016*

**math**

@Damon @Steve @Ms. Sue

*November 28, 2016*

**math**

he coordinate plane below represents a city. Points A through F are schools in the city. graph of coordinate plane. Point A is at negative 5, 5. Point B is at negative 4, negative 2. Point C is at 2, 1. Point D is at negative 2, 4. Point E is at 2, 4. Point F is at 3, negative...

*November 28, 2016*

**Social Studies**

Trade policies set by the central government favored the larger states

*November 21, 2016*

**Physics**

The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.04 cm in diameter. If the temperature of the rod increases by 77.3°C, calculate its increase in length.Calculate its increase in volume. Calculate its increase in diameter. (Use 9.0×10-...

*November 17, 2016*

**Chemistry**

In the qualitative analysis scheme, magnesium and nickel precipitate from solution upon the addition of sodium hydroxide. Once separated from the remaining cations by filtration or decanting, the solid mixture is acidified and warmed to dissolve magnesium and nickel cations ...

*November 17, 2016*

**Chemistry**

The chief compound in marble is CaCO3. However, marble is readily attacked by acids. a) Determine the molar solubility of marble (that is, [Ca2+] in a saturated solution). b) Determine the equilibrium constant for the overall reaction that occurs when marble reacts with acid. ...

*November 17, 2016*

**English 10**

A Contribution to Statistics" 1.Which of the following words best describes the author's view of humanity in "A Contribution to Statistics"? A. Altruistic B. Optimistic*** C. Pessimistic D. Realistic Read the following lines from the poem "A ...

*November 17, 2016*

**Math**

A pack with 6 cans of juice costs 3.48. What it the unit price? A.0.49 per can B.0.50 per can C.0.58 per can •• D.0.60 per can

*November 17, 2016*

**history**

"the correct answers" IS CORRECT! 4/4 <33 1. D 2. C 3. A 4. A CONNEXUS UNIT 6 LESSON 2

*November 16, 2016*

**Physics**

A mass m at the end of a spring oscillates with a frequency of 0.83 Hz . When an additional 770 g mass is added to m, the frequency is 0.65 Hz . Part A What is the value of m? Express your answer to two significant figures and include the appropriate units. Milligrams --> Kg

*November 15, 2016*

**Chemistry**

Oxalic acid, found in the leaves of rhubarb and other plants, is a diprotic acid. H2C2O4 + H2O ? H3O+ + HC2O4- Ka1= ? HC2O4- + H2O ? H3O+ + C2O42- Ka2 = ? An aqueous solution that is 1.05 M H2C2O4 has pH = 0.67. The free oxalate ion concentration in this solution is [C2O42...

*November 15, 2016*

**Geometrical progration**

the 6 term of a G.P is 2000 its common ratio is 10 find the first term?

*November 11, 2016*

**Physics**

A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 87.5 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction. µk=

*November 7, 2016*

**chem**

If you want to increase the pH of the stomach from 1 to 2 using an antacid tablet, how many grams of CaCO3 will be required to change the pH value? Assume the acid is HCl and you have a 1L stomach value

*November 7, 2016*

**American Government**

"In politics, a political party acts as a 'bonding agent' to ensure the good performance of it's candidates and elected officeholders." USE THE QUOTATION TO ANSWER THE QUESTION 1. How do parties typically ensure the good performance of their candidates? A...

*November 7, 2016*

**Physics**

An airplane has a mass of 2.8×106 kg , and the air flows past the lower surface of the wings at 81 m/s . Part A: If the wings have a surface area of 1100 m2 , how fast must the air flow over the upper surface of the wing if the plane is to stay in the air? Express your ...

*November 4, 2016*

**Physics**

Why may someone not be able to cooled by evaporation?

*November 3, 2016*

**Physics**

Assume a person expends mechanical energy at a rate of 450 W. If they were 15% efficient, what would be the rate at which he/she generates waste heat energy?

*November 3, 2016*

**Biophysics**

Assume a person expends mechanical energy at a rate of 450 W. If they were 15% efficient, what would be the rate at which he/she generates waste heat energy?

*November 3, 2016*

**English**

Who is the legendary Arthur, and what did he do to become king of England?

*November 3, 2016*

**Chemistry**

At a certain temperature, 0.885 mol of N2, and 2.654 mol of H2 are placed in a container. N2+3H2=2NH3 At equilibrium, there is 0.823 mol of NH3 present. Determine the number of mol of N2 and H2 that are present when the reaction is at equilibrium. Answer in moled of N2 at ...

*November 2, 2016*

**Math, Precalc**

Sue rides her bike at a rate of 15 mph to May’s house 5 miles away. Then Sue and May walk to a park 2 miles away at a rate of 3 mph. What was Sue’s average speed for the entire trip?

*November 2, 2016*

**Math**

What is the distance from kite C to fishing hook E

*October 31, 2016*

**English-help!**

As used in the poem, the phrase "parlor generals" suggests those who (1)lead naturally (2)ignore advice (3)follow carefully (4)avoid participation I chose 4. Am I right?

*October 30, 2016*

**Math**

Ashley made an pie with a diameter of 25 cm. She cuts the pie into 6 equal slices. What is the area of each pie?

*October 29, 2016*

**Physics**

Three children are riding on the edge of a merry–go–round that is 84 kg, has a 1.40–m radius, and is spinning at 20.0 rpm. The children have masses of 21.0, 24.0, and 29.0 kg. If the child who has a mass of 24.0 kg moves to the center of the merry–go–...

*October 27, 2016*

**Math**

Gina and Maggie working together can do their MI-4 project in 24 hours. If Gina works alone for 8 hours and Maggie then finishes the job in 30 hours, how many hours would it take each working alone to do the project? [Assume both work at a constant rate].

*October 24, 2016*

**Math**

-0.3? I did a question before and it was Estimate f(2.9) given that f(3)=5 and f′(3)=4. And the answer was 4.6

*October 23, 2016*

**Math**

Estimate f(5.9) given that f(6)=5 and f′(6)=3.

*October 23, 2016*

**Physics**

Well from 80 to 70 to 60 is three twenty seconds. 20+20+20=100 (one minute) so from 60 to 50 is 20 seconds. Answer: It will take 20 seconds to cool from 60 degree Celsius to 50 degree Celsius.

*October 20, 2016*

**SOCIAL STUDIES (CHECK answer) please**

THE RIGHT ANSWER IS B The answer is NOT C because Louisiana is in the south east not the west and Americans would not just be able to sell regions,down in Louisiana you have to study the history of that state and its really interesting you get to learn about How it once wants ...

*October 19, 2016*

**Math**

If i remember how to do this correctly than it would be 3260 because 8 is closer to ten so you round up.

*October 19, 2016*

**Math**

8 is in the ones place 5 is in the tens place 2 is in the hundreds place 3 is in the thousands place

*October 19, 2016*

**Physics**

Well we know that Partial Pressure means the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own.

*October 19, 2016*

**physices**

Well we know that Partial Pressure means the pressure that would be exerted by one of the gases in a mixture if it occupied the same volume on its own.

*October 19, 2016*

**chemistry**

Okay. First make your balanced equation: Zn+2HCL-->ZnCl2+2H Now. there is excess HCL. That means Zn is your limiting reactant. So the find out zinc chloride in your stoichiometry you must use Zn. The work: g ZnCl2=(20 g Zn)(1 mole Zn/65.39g)(1 mole ZnCl2/1 mole Zn)(136.29g ...

*October 19, 2016*

**SOCIAL STUDIES (CHECK ANSWER)**

N New York W California E Florida S

*October 19, 2016*

**calculus**

first of all you dont need () those for the five so that's one, and you dont need the () for the 1/x your problem should look like this y=5(3+e^1x) either that that idk

*October 19, 2016*

**Social Studies**

21. The committee of five. Congress picked a committee to write a declaration explaining why the colonies wanted independence. It had three purposes; a theory of government, a list of complaints, and a declaration of war. Remember to use RACE: Restate, Answer Cite Explain.

*October 19, 2016*

**Reading/ language arts**

How does the mother's use of Spanish reflect an important part of her character?

*October 19, 2016*

**Physics**

Block B has a mass of 4.50kg and is moving to the left at a speed of 4.50m/s. Block A has a mass of 6.50kg and is moving to the right. The two blocks undergo a perfectly inelastic collision. What should the velocity of the Block A be in order to have the two blocks move to the...

*October 14, 2016*

**Language Arts**

"I am a citizen of the world" is a key line in the story "When Greek Meets Greek." What does this line mean to you? Explain how this line fits the events of this story or another selection in this unit. Include details to support your explanation. Can you ...

*October 14, 2016*

**Physics**

Two men pushing a stalled car generate a net force of +699 N for 7.13 s. What is the final momentum of the car?

*October 13, 2016*

**pre cal**

A number of cells decreases by 36% every 9 hours. By what percent does it change every 1 hr... 40 mins...2days

*October 9, 2016*

**Physics**

When an 84.7 kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.00E+3 J. By how much does the potential energy of a 17.3 kg child increase when the child climbs a normal staircase to the second floor?

*October 5, 2016*

**Physics**

Suppose a 356–g kookaburra (a large kingfisher bird) picks up a 65.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? How much work did it do to raise its own center of mass to the branch?

*October 5, 2016*

**Math**

Use the diagram below. Write an equation using the angle measures shown. Then, find the measures of LAVB and LBVC

*October 5, 2016*

**Math**

What is 7over N equall to 28 over 48

*October 5, 2016*

**Social studies**

B & C

*October 1, 2016*

**Math**

Working alone, it takes Leeann 30 minutes to clean the back yard. Mandy can clean backyard in 25 minutes . If they worked together how long would it take them to clean the yard?

*September 29, 2016*

**Math**

2 liters of cleaning solution is 65% ammonia. How much water must be added to dilute it to a 40% soulition?

*September 29, 2016*

**Math**

Kelly has 525 red, green, blue balloons. She has 4 times as many green balloons as red balloons. She has half as many blue balloons as green balloons. What is the value of r, the number of red balloons?

*September 26, 2016*

**Math**

Sophia has a total of 32 pictures. She has 17 pictures that are 5 millimeters wide. The rest of her pictures are 6 millimeters wide. What is the value of w, the total width of all of Sophia's pictures?

*September 26, 2016*

**Biochem**

You prepare a 1L solution of 0.5 M imidazole. (pKa= 7.05). Calculate the pH of the solution after you add 0.1 moles of HCl. I need to create an ICE table. I also know I need to use the Henderson- Hasselbalch equation but I'm confused on what to plug in.

*September 23, 2016*

**Physics**

A painter of mass 80.0 kg stands on a platform of mass 75.0 kg and pulls on two ropes which hang over pulleys, as shown. He pulls each rope with a force of 400.0 N. Assuming a coordinate system where +y is up, calculate the y-component of the acceleration ay. ay can either be ...

*September 21, 2016*

**Math**

I think it's 9

*September 21, 2016*

**Physics**

An athlete performing a long jump leaves the ground at a 27.1 ∘ angle and lands 7.73 m away. 1). What was the takeoff speed? Express your answer using three significant figures and include the appropriate units. 2).If this speed were increased by just 3.0%, how much ...

*September 16, 2016*

**trigonometry**

what is the appropriate approximation of cot^-1 27

*September 14, 2016*

**trigonometry**

The shadow of a vertical tower is 65 ft long when the angle of elevation of the sun is 35 degrees. Find the height of the tower

*September 14, 2016*

**Economics**

Do you think a nation’s output should be distributed according to income or according to some other standard (such as basic human need)? Explain your answer.

*September 13, 2016*

**Introduction to algebra**

144 is the product of 9 and Holly's height . Use the variable h to represent Hollys height

*September 12, 2016*

**Chem**

Where is the NO3 and KCl?

*September 11, 2016*

**Chem**

Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) and KCl(aq).

*September 11, 2016*

**Math**

Consider the graph of the parabola f(x)equals=x squaredx2. For xgreater than>0 and hgreater than>0, the secant line through (x,f(x)) and (xplus+h,f(x+h)) always has a greater slope than the tangent line at (x,f(x)). Choose the ...

*September 10, 2016*

**Chemistry**

What is the name of the compound NO3. (Not NO3-, nitrate)???? Please help!

*September 10, 2016*

**Physics (Help Plz)**

Ilya and Anya each can run at a speed of 8.00 mph and walk at a speed of 3.50 mph . They set off together on a route of length 5.00 miles . Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half. 1) Find Anya's ...

*September 9, 2016*

**NAVL Science (help)**

Apparently the equation relationship is : P(vac) = P(atm.) - P(abs) But I need help to find the answers

*September 8, 2016*