Wednesday

November 25, 2015
Total # Posts: 88,282

**HELP AP BIOLOGY **

How would the results of the experiment be affected if you were sloppy and sometimes did not dry off the outside and/or ends of the dialysis bags prior to determining their masses? explain why this would matter.
*October 18, 2015*

**Calculus**

How do I calculate the following? tan−1(tan(8)) − tan−1(tan(4))
*October 18, 2015*

**Chemistry- Dr. Bob**

Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4. Which species ...
*October 17, 2015*

**HELP CALCULUS**

Find dy/dx by implicit differentiation. tan−1(4x2y) = x + 3xy2
*October 17, 2015*

**Chemistry**

Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4. Which species ...
*October 17, 2015*

**Chemistry**

Convert: 10 cm = ? m Convert your answer to scientific notation.
*October 17, 2015*

**business law**

really thats sucks why u have sections for business and law huh
*October 17, 2015*

**business law**

thats not helping i need some answer please
*October 17, 2015*

**Chemistry**

Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4. Which species ...
*October 17, 2015*

**Spanish**

Whats the difference between stem changing in the present tense and the preterite?
*October 17, 2015*

**Spanish**

Como mi madre no sabe hablar espanol yo (traducir) para ella cuando el hombre de Costa Rica nos (decir) las direcciones Traduci and dijeron?
*October 17, 2015*

**Spanish**

Oh. I get confused because when I see "mis" I assume it would be Uds/Ellos/Ellas form.
*October 17, 2015*

**Spanish**

Quien (poner) mis libros en el piso? Pusieron?
*October 17, 2015*

**Spanish**

Thank you
*October 17, 2015*

**Spanish**

Ellos (traer) la pintura a su casa y todos le (dar) a ella una carta bonita. Trajeron and dio?
*October 17, 2015*

**Spanish**

THank you
*October 17, 2015*

**Spanish**

can you explain
*October 17, 2015*

**Spanish**

Pediste
*October 17, 2015*

**Spanish**

Qué te (pedir) tu papá que hicieras? Pediste or Pidio?
*October 17, 2015*

**Chemistry**

2 L
*October 17, 2015*

**Biology**

What holds nitrogen bases together in a Double Helix? (DNA)
*October 17, 2015*

**Biology**

What do Nucleotide Chains create
*October 17, 2015*

**Biology**

Which features are common to all cells? Check all that apply. All cells have cytoskeleton lysosomes vacuoles the cytoplasm flagella and fimbriae photosynthetic membranes the plasma membrane ribosomes the cell wall genetic information (DNA) in chromosomes chloroplasts the ...
*October 17, 2015*

**Biology**

a 5-carbon sugar, nitrogenous base, and a phosphate group
*October 17, 2015*

**Biology**

What are three sub unites or parts of a nucleotide
*October 17, 2015*

**Biology**

adenine (A), guanine (G), thymine (T) and cytosine (C)
*October 17, 2015*

**Biology**

What are the four nitrogen bases of a DNA nucleotide
*October 17, 2015*

**Spanish**

whats the difference between stem changing in the present tense and the preterite
*October 17, 2015*

**Chemistry**

A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O2 gives 29.7 g of a mixture of CO2 and SO2.Find the mass of sulfur in the original mixture.
*October 17, 2015*

**chemistry**

A mixture of carbon and sulfur has a mass of 9.0 g. Complete combustion with excess O2 gives 29.7 g of a mixture of CO2 and SO2.
*October 17, 2015*

**physics**

You are driving on a very long, very straight 2 lane road, stuck behind a lorry which travels at a constant 75 km/hour. You want to overtake the lorry, which has a length of 12.0 m. You car is 3.8 m long. To overtake the lorry, and to do this safely, you need to move to the ...
*October 17, 2015*

**Math**

Jonathan was born 6 years before william. In 2000, Jonathan's age was 2 years more than four times the age of william in 1995. How old will william be in 2020?
*October 17, 2015*

**Chemistry**

What is the name of CrS subscript 3? Chromium (III) Sulfide? But S has a -2 charge... -2(3)=-6 Cancellation of the charge need to occur. I don't understand this.
*October 17, 2015*

**math**

tiangle pqr is an equilateral triangle in a circle. the height of the triangle is 18 cm. the diameter of the circle is 24 cm. find the perimeter of the triangle. can you help me solve this question?
*October 16, 2015*

**Math**

4 out of the 12 students at the table had pizza for lunch what percent of the students had pizza
*October 16, 2015*

**physics**

A 82.0 kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 314.0 N. The floor is rough with a coefficient of friction of 0.30. What is the final speed of the crate, in m/s, after it has been pulled a distance of 13.0 m?
*October 16, 2015*

**Physics **

A shell is fired from the ground with an initial speed of 1.60 × 103 m/s (approximately five times the speed of sound) at an initial angle of 43.0◦ to the horizontal. The acceleration of gravity is 9.81 m/s2 . a) Neglecting air resistance, find the shell’s ...
*October 16, 2015*

**PE**

true... i just took it. All 3 answers are values true true 100%^^^^
*October 16, 2015*

**Maths**

a man earns ¡ê20000 per annum. he recieves a 6% increase each day. how much does he earn after eight years? how many years does he take for jpgis salary to double?
*October 16, 2015*

**Chemistry**

c = 0.01 mol/L; v = 0.10 L; n = cv ∴n = 0.01*0.10 = 0.001 mols MM = 160.11 g/mol; n = 0.001 mols; m = MMn ∴m = 160.11*0.001 = 0.16011 g ∴0.16011g of Sodium Salicylate is required to make 100 mL of a 0.01M Stock solution.
*October 16, 2015*

**biology**

Because few days later he caught 8 fish and had been marked
*October 16, 2015*

**Math**

13 weeks.
*October 16, 2015*

**Math**

You save money in a shoebox under your bed. At first, you had $16.25 in the box. Each week you put your $3 in the shoebox. You spend $4.25 on ice cream each week. In how many weeks will your money run out?
*October 16, 2015*

**chemistry**

flow diagram of extraction acid base organic
*October 16, 2015*

**Math**

an experimental vehicle was able to travel 3/8 mile on 1/16 gallon of water. At this rate ,what was the mileage in miles per gallon of water for this vehicle?
*October 16, 2015*

**Physics**

A 63.7 kg skier encounters a dip in the snow's surface that has a circular cross section with radius of curvature of $r$ = 11.5 m. If the skier's speed at point A in the figure below is 7.87 m/s, what is the normal force exerted by the snow on the skier at point B? ...
*October 15, 2015*

**Math**

1 ounce = 0.0625 pounds 2 pounds = 32 ounces which costs 3 dollars with 9 dollars we can buy 96 ounces of apples apples = 96 ounces/5 ounces = 19.2 I got 19.2 apples but you cant actually buy 19.2 apples so the answer is 19 apples
*October 15, 2015*

**Math**

A store has apples on sale for three dollars for 2 pounds. How many pounds of apples can you buy for nine dollars. If an apple is approximately 5 ounces how many apples can you buy for nine dollars? Explain your reasoning So for the first question I got 6 apples because I ...
*October 15, 2015*

**History**

What is Human Development Index and how is it related to the three tier structure?
*October 15, 2015*

**cultural diversity**

How do early childhood professionals demonstrate their role as advocates for best practices? A. Clearly articulate values and knowledge of best practices in valuing diversity and individual families. B. Attend marches and events to protest biased policies and laws. C. Make ...
*October 15, 2015*

**cultural diversity**

What is an essential element of RtI implementation? A. Instruction that is matched to standardized developmental expectations of students B. Systematic instruction with substantial opportunities for practice in small groups without frequent monitoring C. Frequent, systematic ...
*October 15, 2015*

**cultural diversity**

What degree of intensity and individualization does tier 1 instruction represent? A. Low level of individualization, specialized intensive instruction B. High level of individualization, specialized intensive instruction C. Low level of individualization, general instruction D...
*October 15, 2015*

**math **

a chemist has 3 1/3 fluid ounces of a solution. how many containers can he fill if each container holds 5/12 fluid ounce
*October 15, 2015*

**Social Studies**

Identify some of the benefits of agriculture to ancient Egyptian society. Please help I need you to list 2 or more benefits of agriculture egyptian society and I need a one sentence explanation why it is a benefit
*October 15, 2015*

**maths**

An employee worked 11 hours in a day. Her regular working day is 7.5 hours and the rest was overtime, for which she was paid 1.5 times her regular hourly rate. If she was paid $112 for the day, what was her regular rate per hour for that day?
*October 15, 2015*

**Maths **

Fully factorise X^3-4x^2+x-6 I got (x+3) as a factor but I'm not sure what the other two factors are. Please help Thankyou
*October 15, 2015*

**checking my answers cultural diversity **

What degree of intensity and individualization does tier 1 instruction represent? A. Low level of individualization, specialized intensive instruction B. High level of individualization, specialized intensive instruction C. Low level of individualization, general instruction D...
*October 15, 2015*

**cultural diversity**

Children’s heightened sensitivity to physical differences in people significantly increases between the ages of __________, a time when attitudes toward race and ethnicity are being formed. A. 2 and 3 B. 3 and 5 C. 4 and 6 D. 5 and 7 I think B
*October 15, 2015*

**Math**

5 / 1 = 5 hmm...like "help" said- do you have multiple choice?
*October 15, 2015*

**cultural diversity**

Which is a goal of multicultural education for students who are affected by racism? A. To develop a thick skin B. To develop a positive self-concept C. To develop self-control D. To develop perseverance 2. In general, changes in self-reporting on US Census reports reveal what ...
*October 15, 2015*

**Physics**

Jsjjdjhdhdhjddjdjjdjmdrhgrhajmsmcmfnrjkekekdjd
*October 15, 2015*

**precal**

An IRA is a retirement account that you may withdraw starting at age 60. Financial advisors suggest that you only withdraw 5% a year. If you had $100,000 on that account, at what age would you run out of money?
*October 15, 2015*

**Maths**

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) Given that g(0)=4 show that ab=-2 2) given also that g(3)=40 show that a+b=1 3) given that a and b are integers, give possible values for a and b. My answers 1) g(0) = (-1)(2)(-a)(-b) = -2ab 2)g(3) = (2)(5)(3-a)(3-b...
*October 15, 2015*

**science**

Ethical conflict over cases of cross-border and multigenerational pollution is an example of a dispute relating to
*October 14, 2015*

**Math**

64.5 / 1.2 = 53.75 in
*October 14, 2015*

**Math**

If Phong paints 1 square yard in 2 minutes,how long will it take him to paint a fence that is 3 feet tall and 30 feet long?
*October 14, 2015*

**Physics**

You are pulling handle of a wagon with a force of 270N. The handle makes an upward 35 degrees angle with the ground. The loaded wagon has a mass of 95kg. 1.what is the weight of the wagon? 2.How much of your applied force pulls the wagon forward? 3.what is the normal force ...
*October 14, 2015*

**Math**

If it take Ping 20 minutes to paint a fence that is 3 feet tall and 10 feet long,how long will it take her to paint a fence that is 6 feet tall and 20 feet long, assuming she continues at the same rate?
*October 14, 2015*

**AP Physics 1**

In the javelin throw at a track-and-field event, the javelin is launched at a speed of 33 m/s at an angle of 32° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is ...
*October 14, 2015*

**Math**

If Phong takes 20 minutes to paint a fence that is 3 feet tall and 10 feet long, what is Phong's rate in square feet per minute?
*October 14, 2015*

**Math**

Mr. Youn has 30 times as many pencils as Jack. The whole school has 200 times as many pencils as Jack. If Jack has 2 pencils, how many pencils do the following have?
*October 14, 2015*

**History**

How do maquiladoras help or hurt the economy
*October 14, 2015*

**civics**

9. The purpose of the Constitution is presented in the A. Preamble. B. Articles. C. Amendments. D. Bill of Rights.
*October 14, 2015*

**Social studies**

What simiralities does the Aztecs and the Maya's
*October 14, 2015*

**Physics**

what
*October 14, 2015*

**Math**

thanks for the help!
*October 14, 2015*

**PHYSICS**

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at which cars can move ...
*October 14, 2015*

**physics**

6. Calculate the gravitational force between you (weight: 140 lb) and your classmate (125 lb) sitting 20 inches apart on a bench. Answer must be in standard metric units. I dont want the answer can you just explain how to put it together and how do I add G Which is 6.67x10^-11
*October 14, 2015*

**Physics**

v=[r*g*tan(theta)]^.5 theta=height/(max radius - min radius) To solve for smallest speed, substitute min radius for "r" in velocity equation. To solve for largest speed, substitute max radius for "r" in velocity equation. Good luck! Greetings from UCF!
*October 14, 2015*

**Physics**

On a banked race track, the smallest circular path on which cars can move has a radius of 114 m, while the largest has a radius of 170 m, as the drawing illustrates. The height of the outer wall is 17.5 m. Find (a) the smallest and (b) the largest speed at which cars can move ...
*October 14, 2015*

**PHYSICS**

Car A uses tires for which the coefficient of static friction is 0.399 on a particular unbanked curve. The maximum speed at which the car can negotiate this curve is 10.4 m/s. Car B uses tires for which the coefficient of static friction is 0.831 on the same curve. What is ...
*October 14, 2015*

**Chemistry**

A 0.179 g sample of a vitamin C tablet was titrated with 0.1000 M NaOH according to the procedure in this experiment. The titration required 7.08 mL of NaOH solution. How many moles of NaOH were used in the titration? How Many moles of Vitamin C were in the sample? What was ...
*October 14, 2015*

**PHYSICS**

At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outer wall moves at a speed of 3.78 m/s, and an 63.5-kg person feels a 528-N ...
*October 14, 2015*

**Maths**

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) Given that g(0)=4 show that ab=-2 2) given also that g(3)=40 show that a+b=1 3) given that a and b are integers, give possible values for a and b. Thank you
*October 14, 2015*

**Maths**

A polynomial g(x) is given by: g(x) = (x-1)(x+2)(x-a)(x-b) 1) given that a and b are integers, give the possible values for a and b. Thank you
*October 14, 2015*

**Maths**

Find the coefficient of x^2 in the following expansion. (you do not need to expand the brackets in full) (x-4)(x^3+x^2-2x-1) Thank you
*October 14, 2015*

**Maths**

Find the polynomial,P(x) such that x^3+x^2-13x+3 is identical to (x-3) P(x) Thankyou
*October 14, 2015*

**science**

Which variable in the following statement would be placed on the Y-axis of a graph? If the amount of light increases, then the plants will grow taller.
*October 14, 2015*

**english**

what sentence pattern is are there any more cookies in the jar
*October 14, 2015*

**chem**

A hot air balloon with a volume of 3.20 x 103 L and 120 moles of air is at a temperature of 25 °C. The air is heated to 65°C and 250 moles of air is added. What will the new volume of the balloon be?
*October 14, 2015*

**Algebra**

(1/2) b h = 65 bh = 130 But h = b+3 b(b+3)=130 b^2+3b-130=0 (b+13)(b-10)=0 b=10 test answer: (1/2)(10)(13)=65
*October 14, 2015*

**Math**

You make cards and sell them for $2.50 each. It costs $1.15 to print each card. You also pay $50 for supplies. How many cards must you sell to meet the cost for making the cards (you break even)? Round up to the next whole card. A. 20 cards B. 37 cards C. 20.46 cards D. 38 cards
*October 13, 2015*

**Ochem**

Could someone explain this? Thanks! Which of the following is a correct IUPAC name? a. 3-bromo-2-chlorotoluene b. 6-bromo-4-chlorotoluene c. 2-chloro-3-bromotoluene d. 2-chloro-4-bromotoluene
*October 13, 2015*

**Chemistry**

Acetone is an important chemical solvent and is used at homes as a nail polish remover. Chemical analysis shows that acetone is 62.0%C, 10.4%H, and 27.5%O by mass. A. Determine the empirical formula of acetone. B. In a separate experiment, the molecular mass is found to b 58.1...
*October 13, 2015*

**Social Studies( I REALLY NEED HELP!!!)**

Technological advances in agricultural allow early civilizations to develop and sustain themselves over long periods of time by providing new opportunities for growth in the communities. The advances allow the communities to feed more people and people sustain themselves by ...
*October 13, 2015*

**Simple Interest**

Quincy's property tax is $665 and is due on April 25. He does not pay until July 19. The county adds a penalty of 9.9% simple interest on unpaid tax. Find the penalty Quincy will pay. (Assume that there are 365 days in a year. Round to the nearest cent.) The penalty Quincy...
*October 13, 2015*

**Chemistry**

In March 2007 a number of pets were sickened or killed by pet food contaminated with the chemical melamine, which is used in the manufacture of certain plastics. It is thought that the melamine was added to make a pet food additive appear to have more protein than it really ...
*October 13, 2015*

**6 grade math**

20 + 15 =35
*October 13, 2015*

**math**

it is greater than 35 and less than 45 if you add the two digits the sum is 5 write the number word
*October 13, 2015*

**Chemistry**

A compound frequently used as a high-temperature lubricant has the formula MS2, where M represents some metallic element. If this compound is 40.06% sulfur by mass, what is the identity of the metal M? I'm confused on how to figure this out.
*October 13, 2015*