Tuesday

October 13, 2015
Total # Posts: 85,914

**st Francis Methodist math**

26 200correct to 3 significant figures. What is the smallest possible number
*October 13, 2015*

**physics**

a stone is dropped from the top of a cliff. it is seen to hit the ground 3.5 seconds later. how high is the cliff
*October 13, 2015*

**Physics**

What are these angles?
*October 13, 2015*

**Algebra**

RICHARDS age in 15 years will be twice what it was 7 years ago. How old is richard
*October 13, 2015*

**chemistry**

A reaction mixture of 4.0 mL of 0.002 M SCN- and 5.0 mL of 0.002 M Fe3+ is diluted to 10.0 mL with 0.1 M HNO3 to form the blood-red FeNCS2+ complex. The equilibrium molar concentration of the FeNCS2+ determined from a standardization curve is 1.5x10^-4 mol/L. Calculate, in ...
*October 13, 2015*

**Math**

This is reasonable because $15.25 rounds to $20.00, and $4.85 rounds to $5.00. Added up, that would equal $25.00, which is pretty close to $20.00.
*October 12, 2015*

**Math**

How can Steve add 48+34 by making a ten what is the sum
*October 12, 2015*

**Physics**

A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +3.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is inverted, then enter...
*October 12, 2015*

**Physics**

An object is placed to the left of a lens, and a real image is formed to the right of the lens. The image is inverted relative to the object and is one-half the size of the object. The distance between the object and the image is 95 cm. (a) How far from the lens is the object...
*October 12, 2015*

**Physics**

Can anyone help me here? I have no idea where to start! Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.1°. The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab is 21.1°, the ...
*October 12, 2015*

**History**

Which of the following would not be an example of a vectored disease? A. HIV/AIDS has ravished many people in Sub Sahara Africa B. Malaria has affected many people in Southeast Asia C. Yellow Fever has destroyed the lives of many people in the Caribbean D. Cancer has spread in...
*October 12, 2015*

**SS**

What does it mean for citizens to exercise political power?
*October 12, 2015*

**NON PROFIT ACCTNG**

Three accountants started talking about hospitals. One said he was treated at a not-for-profit hospital, another said she was treated at a county hospital, and the third said he had just returned from the hospital run by the U.S. Veterans Administration. They wondered why ...
*October 12, 2015*

**chemistry**

thanks haha it's a strange question to ask
*October 12, 2015*

**Maths**

Coordinate Geometry A=(7,4) B=(2,0) Gradient of AB = 4/5 Equation of AB in ax+by=0 for is 4x-5y-8=0. The length of AB in surd form is root41. The point C has coordinates (2,t), where t>0 and AC=AB. a) find the value of t. b) without plotting point, find the area of triangle...
*October 12, 2015*

**PHYSICS**

A car travels at a constant speed around a circular track whose radius is 2.82 km. The car goes once around the track in 364 s. What is the magnitude of the centripetal acceleration of the car?
*October 12, 2015*

**anonymous**

In a class 80% students passed in sst ,85% in math ;75%in both subjects .if 40%students failed in both subjects .tell total number of students
*October 12, 2015*

**Chemistry**

Suppose that atomic masses were based on the assignment of a mass of 12.000 g to 1 mol of carbon, rather than 1 mol of ^12C. What would the atomic mass of oxygen be? (The atomic masses of carbon and oxygen based on the assignment of 12.000 g to 1 mol of ^12C are 12.011 amu and...
*October 11, 2015*

**HELP HELP AP BIOLOGY**

A. Explain the term "concentration gradient". Make sure to discuss the difference between a solution's concentration and a concentration gradient. B. An artificial cell contains 0.2 M FRUCTOSE and 0.8 M glucose, AND 2M SUCROSE. It is placed into a solution ...
*October 11, 2015*

**Chemistry**

Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approx. 1.0 x 10^-13 cm. Calculate the density of a neutron. [Hint: For a sphere V=(4/3) pi r^3. Assuming that a neutron star has the same density as a neutron, calculate ...
*October 11, 2015*

**Chemistry**

An alpha particle, ^4 He^2+, has a mass of 4.00151 amu. Find the value of its charge-to-mass ratio in C/kg.
*October 11, 2015*

**math**

a flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 11 feet mre then the length of the shortest side. find the dimmenstions if the perimter is 163feet
*October 11, 2015*

**Finance**

Consider the following income statement and answer the questions that follow: Sales (100 units) $200 Variable costs ($.80 ea) 80 Fixed Costs 20 EBIT 100 Interest Expense 30 EBT 70 Income tax 24 Net Income 46 a. What is the firm’s Breakeven Point in units? b. Draw a ...
*October 11, 2015*

**government**

What does it mean to "get on the ballot" and how does one do so?
*October 11, 2015*

**Organic**

since alanine is on the far left side, it is considered the n-terminal amino acid. phe. would be the c-terminal amino acid.
*October 11, 2015*

**finance**

initial deposit 4100 annual interest rate 8% inflation 3% 30 years
*October 11, 2015*

**algebra**

A chemistry lab wants to prepare 300 liters of 25% acid solution. In stock he has 20% and 35% acid solutions. How many liters of each in stock mixture should he mix tp prepare a 300-liter mixture?
*October 11, 2015*

**Chemistry**

Why does the height of the precipitate of strontium nitrate and sodium carbonate go up as the volume of strontium nitrate increase?
*October 11, 2015*

**math**

A photograph has been enlarged to three times its previous size. By what percentage has the size of the photograph increased?
*October 11, 2015*

**business**

compare and contrast Rational (formal) model for strategy- emergent strategy
*October 11, 2015*

**english**

Change into passive voice? why did you tell a lie
*October 11, 2015*

**Chemistry**

Hey it's me again, I forgot to type that the "Sucrose is nonvolatile,nionaizing solute in water" and the answer to it was 0.571 but what is the solution or how was that the answer? Please help me :)
*October 11, 2015*

**Chemistry**

determine the vapor pressure lowering at 27 C of a solution of 750g of sucrose, dissolved in 180g of water. The vapor pressure of pure water at 27 C is 26.7 torr. Assume the solution is ideal
*October 11, 2015*

**Math**

Are 5^2+10^2-2*5*10 cos50° and 5^2+10^2-2*5*10 cos130° equal to 7.8 and 13.7?
*October 11, 2015*

**Chemsitry**

A mixture of 10.00 mL of H2SO4 and 30.00 mL of HCl required 20.00 mL of 2.500 M NaOH for complete reaction. When 30.00 mL of H2SO4 and 10.00 mL of HCl were used, 28.00 mL of 2.500 M NaOH were required. What were the concentrations of the acids? [Both were 1.000 M] H2SO4(aq) + ...
*October 11, 2015*

**Chemistry**

A 2.00 g impure sample of MgO (molar mass 40.3 grams) was completely dissolved in 50.0 mL of 1.000 M H2SO4. The excess acid was back-titrated with 25.0 mL of 0.800 M NaOH. Calculate the percent purity of the MgO sample. [80.6 %] MgO(s) + H2SO4(aq) MgSO4(aq) + H2O(l)
*October 11, 2015*

**Msth**

Number 1 should say variable
*October 10, 2015*

**maths**

what is 1/50 x length of new garage?
*October 10, 2015*

**Math**

A parallelogram has an angle of 50 degs and sides of 5 and 10 inches. What are the lengths of the diagonals? Round each to the nearest tenth of an inch.
*October 10, 2015*

**Chemistry**

* From your hint, I arrived at an answer of 3.46 x 10^4 but the answer key says 3.11 x 10^5 Ib. A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds? DrBob222: 185 yd^3 x (3 ft/yd) x (3 ft/yd) x *3 ft/yd) = ? cubic feet. ...
*October 10, 2015*

**Chemistry**

The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0 x 10^-13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm. What fraction of the space within the atom is occupied by the nucleus.
*October 10, 2015*

**Chemistry**

A backyard swimming pool holds 185 cubic yards (yd^3) of water. What is the mass of the water in pounds?
*October 10, 2015*

**physics**

when starting a foot race a 66 kg sprinter exerts an average force of 640 N backward on the ground for 0.85s. What is his final speed in m/s?
*October 9, 2015*

**math**

thank you is the equation going to be x+9+3x+9=78
*October 9, 2015*

**math**

The sum of the ages of Jose and Valerie is 78 years. 9 years ago, Jose's age was 3 times Valerie's age. How old is Jose now? (A) Translate the given information into an equation using the variable x = current age of Jose. Your equation should contain 78, 3, and 9. Do ...
*October 9, 2015*

**Math**

Skyler is 2 years older than Sonya. In 9 years the sum of their ages will be 50. How old is Sonya now? (A) Translate the given information into an equation using the variable x = current age of Sonya. Simplify the left side of your equation. _____________ = 50 (B) How old is ...
*October 9, 2015*

**bio**

During lab, you are provided with a stock antibody solution (Ab) that has a concentration of 400 μg/μl (Tube 1). It is necessary make the following dilutions.
*October 9, 2015*

**History**

Differences in Similarities between Sweden, Malaysia, and India
*October 9, 2015*

**chemistry**

If 3.15 mL of vinegar needs 42.5 mL of 0.115 M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.40 qt sample of this vinegar?
*October 9, 2015*

**Maths**

Line L1 has equation 2x -3y+12=0 Gradient of L1 is 2/3x The line L1 crosses the x axis at the point A and the y axis at the point B. The line L2 is perpendicular to L1 and passes through B. A) find and equation of L2 The line L2 crosses the x axis at the point C B) find the ...
*October 9, 2015*

**Maths**

Determine the values of K such that the quadratic equation x^2 + 2Kx - 3K =0 has equal roots Thankyou
*October 9, 2015*

**Algebra**

Molly left home and drove toward the ferry office at an average speed of 27 mph. Mark left two hours later and drove in the same direction but with an average speed of 45 mph. How long did Molly drive before Mark caught up? I am terrible at word problems and this is a review ...
*October 9, 2015*

**Math**

Taiti drank 3/4 glass of orange juice, 1/8 glass of prune juice, and 1/2 glass of milk. How much did she drink all together?
*October 9, 2015*

**statisciscal inference**

The probability that a patient recovers from a delicate heart operation is .0.9. What is the probability that exactly 5 of the next 7 patient having this operation survive?
*October 9, 2015*

**Biology **

I put them in order, but am not sure. Please take a look? Question: Put the following events of the adaptive immune response in the order they occur. (c) You cut yourself and bacteria enter the wound. (f) A dendrite near the cut phagocytizes some bacteria and uses MHC proteins...
*October 9, 2015*

**Microbiology**

Which of the following molecules do you think would make good antigens for recognizing a pathogen? You may choose more than one. 1) a cell wall protein 2) a piece of DNA inside a cell 3) a protein that is part of a flagella 4) a uniquely shaped protein that is part of a virus ...
*October 9, 2015*

**math**

I am trying to get this answer too
*October 9, 2015*

**prasanna high school**

Subject:maths. question: the sum of first 6terms.of an aritmetic progression is 6.the product of 2nd term & 5th term is -80 find the terms of A.P.
*October 9, 2015*

**Maths**

Write in completed square form -x^2 - 3x + 7
*October 9, 2015*

**umuc**

For the reaction HCONH2(g) NH3(g) + CO(g), Kc = 4.84 at 400 K. If ΔH° for this reaction is 29 kJ/mol, find Kc at 500 K.
*October 9, 2015*

**maths **

The sum of first 6 terms of an Arithmetic progression is 6 the product of 2nd term and 5th term is -80 . Find the terms of A.P.
*October 8, 2015*

**Pre-Calc**

How do I simplify (tan x/(1 + sec x))+((1 + sec x)/(tan x))?
*October 8, 2015*

**Simple Interest**

(1 point) 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 ...
*October 8, 2015*

**Physics**

A ball thrown upward from the a point 7 meters below the bottom of a window rises past the window, which is 2.5 meters high, passing the window in 0.33 seconds. How fast was it going when it reached the bottom of the window, and with what velocity was it initially thrown upward?
*October 8, 2015*

**Math**

How do i solve for r? (-2,7) (r,3) m=4/3
*October 8, 2015*

**science**

Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. (2 pts) List and briefly outline the six different periods into which the Paleozoic era is divided.
*October 8, 2015*

**rainbow**

Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. (2 pts) List and briefly outline the six different periods into which the Paleozoic era is divided.
*October 8, 2015*

**Calculus**

Use the FTC 1 to find the area of the region under the graph of the function f(x)= 8x-x^2 on [0,8]. I got 244/3 but the answer key says 256/3.
*October 8, 2015*

**Math**

Sarah rolls a die twice. What is the probability that she rolls a 3 and then an even number?
*October 8, 2015*

**english 1**

Which excerpt from the passage best allows the reader to infer that the Maori people felt cared for by the earth?
*October 8, 2015*

**science- physics**

In this question, the vector makes a 31 degree angle with the y-axis, not the x-axis. Also, remember that the x-value is negative. The correct answer is -3.09, 5.14 km.
*October 8, 2015*

**math**

CAN ANYONE CHECK THIS FOR ME PLEASE! NEED IT ASAP.. 5 < x -2 < 11 a. 5 < x < 11 b. 7 < x < 13 **** c. 7 < x < 11 d. 5 < x < 16
*October 8, 2015*

**probability**

The length of time for one individual to be served at a cafeteria is a random variable having an exponential distribution with a mean of 4 minutes. What is the probability that a person is served in less than 3 minutes on at least 4 of the next 6 days?
*October 8, 2015*

**math**

A scale drawing is made to enlarge a picture by using a scale factor of 3. The enlarged picture is 9 inches by 15 inches. What are the dimensions of the original picture?
*October 8, 2015*

**HELP HELP CALCULUS **

y=e^(5e^x) differentiate first and second derivative
*October 7, 2015*

**Math**

John needs $20 to buy a ticket to a show. He earned 1/4 of the money on Monday, 2/5 on Tuesday and 1/ 10 on Wednesday. What fraction of the money does John still need to earn?
*October 7, 2015*

**Math**

John needs $20 to buy a ticket to a show.He earned 1/4 of the money on Monday, 2/5 onTuesday,and 1/10 on Wednesday. What fraction of the money does John still need to earn?
*October 7, 2015*

**Chemistry **

4.Report your answer in correct significant figures. A.1.32*10^4cm+2.1*10^2
*October 7, 2015*

**Biology**

What is the difference between an environment with freshwater and an environment with pristine wates? I need to design an experiment with a shrimp that is found in freshwater but not in pristine but I don't understand what is the difference between the two. Thanks!
*October 7, 2015*

**math**

compare x+y o 19
*October 7, 2015*

**Chemistry**

How do halogens (Cl2, Br2, I2) react with halides (Cl-, Br-, I-)? Can we explain this reactivity?
*October 7, 2015*

**Chemistry**

What is the relationship between the relative reactivities of the halogens when compared to the relative reactivity of the halides?
*October 7, 2015*

**History**

How are export processing zones a part of globalization and industrialization
*October 7, 2015*

**English **

After watching roy Hargrove play the trumpet, marcia decided that she wanted to be one
*October 7, 2015*

**government**

which political party heads all the committees?
*October 7, 2015*

**Government**

How often are filibusters used? Why?
*October 7, 2015*

**Science- RE-DO**

1. b 2. c 3. a 4. d 5. b
*October 7, 2015*

**Math**

a test 50 problems on it. for every correct answer, 2 points are given. for each incorrect answer, 1 point is subtracted. sue scored 85 points. how many problems did she miss?
*October 7, 2015*

**physics**

The steel I-beam in the drawing has a weight of 1.53 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends?
*October 7, 2015*

**Math**

What is .768 divded by 1.6
*October 7, 2015*

**thermodynamics**

heat in the amount of 5 KJ is added while its internal energy decreases by 10 KJ. how much energy is transferred as work? for a process causing the same change of state but for which the work is zero, how much heat is transferred?
*October 7, 2015*

**thermodynamics**

liquid water at 100C and 1 bar has internal energy (on an arbitrary scale) of 419 kj /kg and a specific volume of 1.044cm3 /g a- what is its enthalpy? b-the water brought to the vapor state at 200C and 800 kpa, where its enthalpy is 2838.6 kj/kg and it is specific volume is ...
*October 7, 2015*

**english**

thank you is number 6 a correct sentence ?
*October 7, 2015*

**english**

2.fused sentence 3. comma splice 6. comma splice 8. fused sentence
*October 7, 2015*

**english**

Q1. Identify whether the word groups are fused sentence, comma splice or correct sentence.(4) i There is nothing better for a cold than a hot coffee and a big box of chocolate ____________ ii She ran out of the room the shadows in the corner had scared her._________ iii Tim ...
*October 7, 2015*

**ACCT**

A lumber yard is going to cut a board which is 18 m into 16 pieces of equal length. How long will each piece b
*October 7, 2015*

**math **

Audrey can drive 150 miles on 6 gallons of gas,and 225 miles on 9 gallons of gas.write an equation for the distance,d, that audrey can drive on g gallons of gas.
*October 7, 2015*

**French**

"Je mets un chemisier." Is this pronounced "mez un" or "mey un"?
*October 7, 2015*

**GRAMMER**

The wound was copiously irrigated with normal saline, and the mucosal flap was replaced to its appropriate position.
*October 7, 2015*