Post a New Question

Posts by Lisa

Total # Posts: 3,422

math
the width of a rectangular garden is 2 m less than its length. Determine the dimensions of the garden if the area is 36 m2. thanks!

CHEMISTRY
(c) What is the value of the degree of polymerization n of isotactic PB with a molecular weight of 3.091×105 g/mol?

pre algebra
a typist works from 10am to 6pm making $120 for the day. after typing from the end of page 8 to the end of page 50, find the number of pages per hour. find the rate of pay in dollars per page

math
Solve 4a2 + 25 = –20a by factoring. Verify your solution Solve and verify the following equation: 13x2 + 35x + 21 = –12x2 – 25x – 15

math
One bag contains 6 red chips and 5 yellow chips. Another bag contains 6 red chips and 4 yellow chips. A chip is drawn from each bag. What is the probability that both chips are yellow?

ASAP help CHEMISTRY
I am completely lost on partial pressure. Please work it out for me so i can see the step by step. THANKS!

ASAP help CHEMISTRY
A cyclopropane-oxygen mixture is used as an anesthetic. If the partial pressure of cyclopropane in the mixture is 334 mmHg and the partial pressure of the oxygen is 1.02 atm, what is the total pressure of the mixture in torr?

algebra 2
2x^2-5x-3 show all the step please thanks

algebra 2
find the solution ,show all the step please y=x^3+125

chemistry
Chemical analysis of a silicon crystal reveals gallium at a level of 3.091×10−6 atomic percent. Assuming that the concentration of thermally excited charge carriers from the Si matrix is negligible, what is the density of free charge carriers (free carriers/cm3) in ...

CHEMISTRY HELP PLEASE
so am i not using V=nRT/P

CHEMISTRY HELP PLEASE
2NaN3(s)==>2Na(s) + 3N2(g) How many liters of N2 are produced at STP if the air bag contains 114g of NaN3 ?

algebra 2
how can i solve this help please show the step 3square rood of 64x^4

algebra 2
what is the square root of 196x^12

algebra 2
take the square root problem square root 196x^12 show the step please thanks

algebra 2
take the square root of problem square root 64x^6

algebra 2
find the zeros of quadratic ( 8v+7)(v-2)=0 show the step please

algebra 2
take the square root of problem square root 64^6 please show all work

algebra 2
find the zeros of quadratic ( 8v+7)(v-2)=0 show the step please

Introduction to High School
D. A desk stocked with supplies

Introduction to High School
All of the following are characteristics of an effective study environment EXCEPT: A. a relaxing area such as your bedroom B. comfortable and balanced temperature C. ample amounts of natural light D. a deck stocked with supplies

social studies
IN THE ELECTION OF 1912, Teddy Roosevelt's Bull Moose Party platform was built around what he called the a.fair deal b.square deal I think it's a fair deal but not sure

statistics
Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

statistics
Compare the 95%(6.214,7.686) and 99% 95.944,7.956)confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs.

algebra 2
check my answer please find the number of zeros(x-intercepts) y=3k^3-6k^2-45k=k(3k+9)(k-5)= k(3k^2-15k+9k-45)=k(3k^2-6k-45) or should i do it 3k(k-5) (k+3)=3k(k^2+3k-5k-15)=3k(k^2-2k-15) which on is the right one please let me know.thanks

Geometry
The lengths of the sides of a triangle are 3,5, and 7 inches. How many inches long is the shortest side of a similar triangle that has a perimeter of 75 inches? F.10 G.12 H.14 H.15 k.22

algebra 2
-7.8

algebra 2
find the number of zeros(x-intercept) y=a^2+a-56 show the step please.

algebra 2
i have big number -45,99,127,358

algebra 2
given the zeros,write a polynomial equation in factored form.zeros: -45,99,127,358 show all the step please.

algebra 2
given the zeros, write a polynomial equation in factored form.zero -5,9,12 show all the step please

chemistry
You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

chemistry
You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

chemistry
You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

chemistry
You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

chemistry
You wish to remove nitrogen from the near-surface region of a plate of cobalt which is 1.0 cm thick. The plate is placed in a furnace at 417∘ C where an atmosphere of H2 and NH3 reacts with the nitrogen in the cobalt and fixes the surface concentration to 111 ppm (parts ...

chemistry
An undesirable consequence of welding steel by acetylene torch is the rise in hydrogen concentration in the metal. That hydrogen contamination embrittles the steel. The metal is typically subjected to a vacuum heat treatment to restore ductility. A steel part is placed in a ...

chemistry
"Carburization" of pure iron (Fe) is carried out at 950∘ C. It is desirable to achieve a carbon content of 0.9% at a depth of 0.1 mm below the surface. A constant supply of carbon at the surface maintains a surface concentration of 1.2%. Assuming the ...

math
make a 5 by 5 tile uisng 5 different colors. None can be in the same row nor be diagional.

Chemistry
Using Dimensional Analysis One mole of sillicon has a mass of 28.1 g, and one mole of oxygen has a mass of 16.0 . What is the mass of one mole of sillicon dioxide.

PHYSICS - PLEASE HELP
total momentum = m1(v1)+m2(v2)+m3(v3) total momentum = [(5)8]+[(-4)15]+[(2)3] total momentum = (40)+(-60)+(6) total momentum = (-20)+(6) = -14 Answer: A

7th grade math Ms. Sue please
me too. it's awful

5th grade math
Jason ate lunch at Virginia’s Diner. If his meal cost him $11.00, and he wants to leave Virginia a 15% tip, how much money should Jason leave for the total bill? A. $11.50 B. $12.00 C. $12.36 D. $12.50 E. $12.65 how do you do this?

Chemistry?HELP
Is carbon graphite or a diamond harder to break or scratch and why. You must use an explanation of molecular geometry, intermolecular and intramolecular forces to answer this question. I'm confused...

Chemistry
The fictitious compound, arrhenium fluoride ( ), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...

CHM
Predict whether the following bonds are ionic, covalent, or polar covalent based on the bonding atoms electronegativities: N2 The Al-O bond in Al2O3 MgO CuS

MATH
From HOME TO THE FAIR IT'S 70 MILES, I have driven about 30 miles at 40 miles per hour. how many hours would it take me to finish the remaining miles?

accounting
On September 1, 2013, Jacob Furniture Mart enters into a tentative agreement to sell the assets of its office equipment division. This division qualifies as a component of the entity according to GAAP regarding discontinued operations. The division's contribution to Jacob...

chemistry
Urbium (Ur) is an upscale element found in big cities. Its oxide (UrO2) is not very stable and decomposes readily at temperatures exceeding 66∘ C. The figure below shows how the rate of reaction varies with the concentration of UrO2 at 75∘ C. The rate r is in units...

Math
i need the equation

chemistry
Normal glucose levels in the blood are from 70 to 110 mg glucose per 100 mL of blood. I the level falls too low, there can be brain damage. If a person has a glucose level of 108 mg/100 mL, what is the total mass of glucose in grams in 5.10L of blood?

algebra 1
Two vans leave town at the same time going in opposite directions. one travels at 60 miles/hr. the second travels 30 miles/hr. in how many hours will they be 180 miles apart?

chemistry
15.00 ml of NaOH is obtained in an Erlenmeyer flask. Before titrating with .2500 M HCl, the initial volume of acid in a buret is read as 2.08 ml. At the endpoint the final volume of acid in the buret is 25.20 ml. What was the concentration of NaOH?

physics
thank you very much!

physics
ah thanks, it's 10^3 kg/m^3

physics
A box with a volume V = 0.03 m^3 lies at the bottom of a lake whose water has a density of 103 kg/m^3. (a) How much force is required to lift the box, if the mass of the box is 100 kg? (b) How much force is required to lift the box, if the mass of the box is 70 kg?

maths
Let A, B and C be the sets such that A ∪ B = A ∪ C and A ∩ B = A ∩ C. Show that B = C.

Algebra
Let L= 3x and B = 2x. P = 2L + 2B 73= 2(3x)+2(2x) 73= 6x+4x 73= 10x or x = 73/10 x = 7.3 cm Now, L = 3x= 3(7.3)=21.9 cm and B = 2x= 2(7.3)=14.6 cm

math
If the key to Graceland costs $750 today and appreciates in value by 15% in one year, what will it be worth one year from today?

math
find first 4 terms of following sequence: a1=-6 abd an=2an-1+3 for n >2

math
whats the present value of 850.00 made in 10 years with a discount rate of 12%

math
so am i then 150 (1.07)^7%

math
ok now the same 8 years at 8% with a deposit of 150.00 can you please show me the calculation

square roots
Describe the Number systems used in mathematics with the use of subsets of the real number system.

math
if my input numbers are 1,2,3,4,5,6 and my output numbers are 8, 14, ?, 24,28,?...I cannot figure out the rule and the numbers where the question marks should be.

math
40÷0.8=50

math
I am trying to figure out an input/output problem: Input Output 1 8 2 14 3 - - 24 - 28 6 -

pre-algebra
write 16/19 in decimal notation

Math
Ricky wrote the following to show that his sister's age is 6 yrs. less than 3 times his age. Explain what he did wrong. Give the correct expression Let a stand for my age My sister's age a/3-6

Stattistics
In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78 12.45 One student’s Math score was 70 and the same individual’s English score...

chemistry
balanced equation for potassium nitrate(s)--->potassium nitrate(s)+oxygen(g)

Chemistry
If 0.10 mg Fe is diluted in a 50 mL flask, what is the concentration of the resulting solution? What volume of the resulting solution is needed to prepare 25.0 mL of a dilute sample solution with a concentration of 0.30 ppm Fe?

College Math
i'm having trouble calculating this. can someone help please? A $7,000, 4%, 120-day note, dated March 20, is discounted on July 15. Assuming a 3% discount rate, the bank discount is: a) $1.74 b) $1.77 c) $7.11 d) $17.68 e) None of these .

Valencia
2.0L of a 2.0M HCl solution is added to water so that the final volume is 6.0L

Science- chemistry
After extraction with bicarbonate in which layer is the benzoic acid?

statistics
0.1113

chemistry
what mass of silver bromide will form when 25.00 mL of a 0.0675 M MgBr2 solution is combined with mL of 0.100 M AgNO3?

MATH
FAITH HAS A TRIANGULAR SANDWICH AND ONE SIDE THAT IS 4IN LONG AND ANOTHER SIDE IS 3 IN WHAT IS THE RANGE OF THE THIRD SIDE

management science
Kim Davis has decided to purchase a cellular phone, but she is unsure about which rate plan to select. The "regular" plan charges a fixed fee of $55 per month for 1,000 minutes of airtime plus $0.33 per minute for any time over 1,000 minutes. The "executive"...

chemisty
a 10.00ml diluted chloride sample required 44.89 ml of 0.01982 m abno3 to reach the fajans end point. how many moles of cl ion were present in the sample

Physics
Never mind. (30)(50)(cosine 53degrees) (1500)(.6) 900J

Physics
Push a loaded grocery cart by a distance of 50m exerting horizontal force of 30N on the cart at an angle of 53degrees, how much work would you do on the cart?

Physics
How much work did the movers do horizontally pushing a 160-kg crate 10.3m across a rough floor without acceleration, if the coefficient of friction was 0.50?

business law
The initials "L.S." at the end of a document mean?

phyiscal chemistry
Moving from solid to liquid by changing the pressure, so what happend if u decrease the pressure on a solid at constant temperature?

bus 115
How is the Web affecting the way business is conducted? Are there changes

math
jill bought 32 orange and apple slices. There were three times as many orange slices as there were apple slices. how many of each did she have

history
The capital of the Southern Song Empire was the city of Kaifeng Beijing X'ian Hangzhou Shanghai I think its Hangzhou but any help would be greatly appreciated!

Statistics
The closing price of Schnur Sporting Goods, Inc., common stock is uniformly distributed between $15 and 30 per share. What is the probability that the stock price will be: (a) More than $24? (Round your answer to 4 decimal places.) Probability (b) Less than or equal to $17? (...

Astrophysics
Star Power and Temperature Star A and Star B Consider two stars that are the same size (they have the same diameter), but have different surface temperatures. Let’s say Star A’s temperature is 3000 K and Star B’s temperature is 4500 K. Let’s look at the ...

calculus
Let f be the function defined by f(x)= sqrt(x), 0 <or= x <or= 4. and f(x)= 6-x, 4 < x <or= 6 a. Is f continuous at x=4? justify. b. Find the average rate of change of f(x) on the closed interval [0,6]. c. suppose the function g(x)= k sqrt(x), 0 <or= x <or= 4...

Public Administration
Explain the budget system model, its consistency with democratic theory, and the importance of data measures.

business
What data and stats do you need to know in order to identify profitable nations in which to export.

Math
Perry draws two planes, K and L, as shown. Which statement is true? Plane K and plane L contain four lines because a theorem states that a line extends on both sides of a plane. Plane K and plane L intersect along a line because a postulate states that if two planes intersect...

ashford university
At which stage of the process of film production does editing primarily take place

3rd Grade Math
There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class? How can I explain this to my 8yr old in 3rd grade? I've got myself so confused in the process of trying to figure ...

math
Math word problem: There are 25 students in Mrs. Roberts 3rd grade class. There are 9 more boys than girls in the class. How many boys and girls are in Mrs. Robert's class.

probability
Thank you so much for taking the time to help me.

probability
in a health study, 18% of americans are underweight. If 4 americans are randomly selected, what is the probability that at least one will be underweight?

math
prime factorazation of 34

  1. Pages:
  2. <<Prev
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. Next>>

Post a New Question