Tuesday
September 16, 2014

Posts by Lisa


Total # Posts: 2,992

Math
What is the domain of the function f(x)= -3^(x+3)+4? I got (-infinity, infinity) is that correct?
March 27, 2014

Math
What is the domain of the function f(x)=2^(x+3)-1? I got (-infinity, infinity) is that correct?
March 27, 2014

Math
Rewrite the equation y - 37x = 82 as a function of x. I got f(x)= -37x +82 is that right?
March 27, 2014

Math
The length of a table is 3 1/3 inches. The width is 1/5 of length. Find the width and perimeter of table
March 26, 2014

Enghish Identify pronoun errors
case
March 25, 2014

Statistics
11
March 23, 2014

Math
Today you deposited $5000 into a savings account paying 12% interest. How much should you have in 15 years?
March 21, 2014

english
Which synonym of the word look would be most effective in the following sentence? Detective Flint leaned forward with narrowed eyes to _______ what appeared to be a vital clue. A. survey B. scrutinize C. view D. ogle I think it would be B.
March 20, 2014

Math
Any began a running program she ran less than 5/6 of a mile what part if a mile could any have run
March 19, 2014

math
Eddie walked 3/4 miles from his home to the park then walked 2/4 miles from the park to the library which distances is shorter
March 17, 2014

Physics
what type of heat transfer does solar hot water heating use? (conduction, convection, radiation)
March 10, 2014

physical science
An airplane trvels with a velocity of 200 mi/h in a direction 30 deg. west of north of 1.50 h. How far north and how far west is it from its starting point?
March 7, 2014

Physics -- check answers please (new)
1. Which of the following best shows the transfer of heat by radiation? a) the hot sand in very painful to step on with bare feet b)the soup pot boils from the bottom towards the top c)the wood stove is painted a flat black colour for maximum heating effect d)the use of fossil...
March 4, 2014

Physics -- check answers please
1. Which of the following best shows the transfer of heat by radiation? my answer: c 2. Which of the following best shows the transfer of heat by convection? my answer: b 3. Water has specific heat of 4200 J per kilogram per degree celsius. This means that 2 kg of water will ...
March 4, 2014

US history
1. In the early years of the war, all reports coming to the USA had to be “cleared” through England. 2. In the 1916 presidential election, Republicans used the slogan “He kept us out of war” against Wilson. 3.Wilson’s Fourteen Points called for self-...
March 4, 2014

Economics
A clinic has $1 million in revenues and $950,000 in costs. What is its operating margin? My answer is 5% However the second question is if the clinic invested $400,000. What is the return on investment and is it adequate. Not sure how I calculate that. Would I take the 5% of $...
March 4, 2014

Physics -- check answers please
1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about a home in terms of ...
March 3, 2014

Mathmatics
Create a program that uses the same formula above to output the result; this time, however, prompt the user for the values a, b, x, and y. Use appropriate variable names and naming conventions.
March 3, 2014

Chemistry
Oh okay, thankyou!
March 2, 2014

Chemistry
I know I'm suppose to use 3.86934 as the first volume and 10 kPa as the second pressure, but what am I suppose to use as the first pressure? Am I suppose to use 20.0 km?
March 2, 2014

Chemistry
A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L
March 2, 2014

Physics -- check answers please
1. what is 67 K equivalent to in Celsius? answer: -206.15 C 2. what is 458.9 Celsius in K? answer: 732.05 3. heat is closely related to: a)temperature b)thermal energy c)force d)convection currents answer: b 4. What does a low efficiency score reveal about a home in terms of ...
March 2, 2014

science
unscramble rorpsfgnloaedeasi
March 1, 2014

Social studies
Help me to write an acrostic about motion.
February 27, 2014

Economics Supply and Demand
The demand function is Q=600-P with P being the price paid by consumer. I know the first P is $400 and Pnet is 160. There is 40% co insurance,. How do I figure out the quantity demanded? Our instructor said it was 440 but how do you get to that number?
February 27, 2014

IFSM 300
The sales department tells management that they can increase revenue by 20 percent by increasing sales 20 percent, but the production department says that to achieve that number of units, they will have to buy a new piece of equipment that will add $200,000 to the appropriate ...
February 26, 2014

IFSM 300
The sales department tells management that they can increase revenue by 20 percent by increasing sales 20 percent, but the production department says that to achieve that number of units, they will have to buy a new piece of equipment that will add $200,000 to the appropriate ...
February 26, 2014

Economics/Forecasting
If you anticipate that volume will increase at your clinics by 4% next year. Forecast visits for each clinic, and explain what assumptions underline your forecast. Can someone give me an example please not sure what it is asking.
February 25, 2014

Physics-check answer please (multiple choice)
1. A 2.5 kg mass at rest on a horizontal surface is acted upon by an applied horizontal force of 150 N. A frictional force of 100 N acts on the mass. How much work is done on the mass? my answer: would the work be 0? 2. When a rock is thrown straight up in the air, after it ...
February 24, 2014

math
Each user has a password 6 characters long where each character is an uppercase letter, a lowercase letter, or a digit. Each password must contain at least one digit. How long will it take to check every possible character combination, if each check takes one unit of time.
February 24, 2014

Physics -- check answers please
1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
February 23, 2014

physics
how far does a wave travel in one period?
February 23, 2014

Physics -- check answers
1. In moving an object of mass 10 kg through a distance of 8.0 m, 40 J of work is done. The average force exerted is? my answer: 320N 2. What is the kinetic energy of a 20 kg object moving at a speed of 10 m/s? my answer: 1000J 3. the gravitational potential energy of a bird ...
February 23, 2014

chemistry
Electronegativity is a concept that is useful along with other concepts in predicting the polarity of a bond deciding how many electrons are involved in a bond formulating a statement of the octet rule determining the charge on a polyatomic ion
February 23, 2014

Chemistry
which of the following sets of elements is arranged in order of decresing electronegativity? O,S,As Cl, B, CL Br, Cl, P Be, C, O please explain correct answer
February 23, 2014

chemistry
what is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? linear angular trigonal planar tetrahedral please explain the correct answer
February 23, 2014

chemistry
VSEPR theory predicts that the geometry of AsH3 molecule is which of the following. linear trigonal planar trigonal pyramidal tetrahedral please explain the correct answer
February 23, 2014

math
convert 20 pounds to kilograms then round to the nearest tenth
February 23, 2014

american government
McCulloch v Maryland is an important case because it was one of the cases whereby the Supreme Court (Points : 1) asserted the supreme authority of Congress. asserted national authority over the states. upheld states’ rights. affirmed Maryland’s right to tax national...
February 21, 2014

american government
In Gibbons v. Ogden, the Supreme Court held that (Points : 1) states’ rights to regulate may not trample on powers specifically reserved for Congress. states’ rights supersede national authority. the national government does not have interstate commerce authority. ...
February 21, 2014

advanced functions
=the height in metres of a weather ballon above the ground after t seconds can be modelled by the function h(t)=-2t^3+3t^2+149, for 0<t<10. when is the ballon exactly 980 m above the ground?
February 20, 2014

Math
A killer whale has eaten 75 pounds of fish today. It needs to eat at least 140 pounds of fish each day. A bucket holds 15 pounds of fish. Write and solve an inequality that represents how many more buckets of fish the whale needs to eat?
February 20, 2014

Chemistry URGENT
Please show how N and O are combined to make NO^+2 in Lewis dot structure. I'm having a hard time. Thanks
February 19, 2014

Chemistry
three separate questions 1. An empty graduated cylinder weighs 82.450 g. When filled to 50.0 mL, with an unknown liquid it weighs 110.810 g. What is the density of the unknown liquid? 2. It is valuable to know that 1 milliliter (mL) equals 1 cubic centimeter (cm^3) or cc.). ...
February 11, 2014

Economics
It takes a phlebotomist 15 minutes to complete a blood draw. The supplies for each draw cost $4, and the phlebotomist earns $20 per hour. The phlebotomy lab is designed to accommodate 20,000 draws per year. What are the average and incremental costs of a blood draw when the ...
February 10, 2014

statistics
Provide the Z score and the critical value. Raw score of 112, population mean 89, Std. of the population (22.8)
February 10, 2014

statistics
The test scores of students in a class test have a mean of 65 and with a standard deviation of 8. What is the probable percentage of students scored more than 70?
February 10, 2014

chemistry
In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO DrBob222 you said you would choose the answer d and I should know how to figure this out. I don't understand the ...
February 9, 2014

chemistry
the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: a. TlTe b. Tl3Te2 c. Tl2Te3 d. Tl2Te
February 9, 2014

Chemistry
6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates what? Which of the ...
February 9, 2014

chemistry
In which of the following pairs of compounds are both members of the pair ionic compounds? Explain a. Pl3 and HBr b. H2S and NCl3 c. LiF and H20 d. LiI and NiO
February 9, 2014

chemistry
the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: Please show. thank you
February 9, 2014

Healthcare Economics
Your president bought two acres of land for $200,000 ten years ago. Although it is zoned for commercial use, it currently houses eight small, single-family houses. A property management fir that wants to continue leasing the eight houses has offered you $400,000 for the ...
February 8, 2014

math
a train leave Chicago at a 115 miles per hour towards Denver another train leaves Denver 105 miles per hour towards Chicago if the distance between the two cities is 1200 miles how long would it take before the two trains meet?
February 7, 2014

calculus
If limit as delta x approaches 0 of tan(0+Δx)-tan(0)/Δx =1 which of the following is false: d/dx [tanx]=1 the slope of y = tan(x) at x = 0 is 1 y = tan(x) is continuous at x = 0 y = tan(x) is differentiable at x = 0
February 6, 2014

calculus
Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
February 6, 2014

clalc
and the answer options are h is continuous at x = 0. h is discontinuous at x = 0 since h(0) is undefined. h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not exist h is discontinuous at x = 0 since the limit of h(x) as x approaches 0 does not equal 0
February 6, 2014

clalc
Suppose h(x) = f (g(x)) and the graphs of f and g are shown below. Describe the continuity of h at x = 0. how would you do this if you were given two graphs: F--- discontinuity at -2,0; point at -1,1; and point at 0,0 (to make a parabola) then discontinuity at 0,-1; and then ...
February 6, 2014

calculus
Which of the following best describes the limit as x approaches 4 of the quotient of 2 times x divided by the quantity negative 2 plus square root of x ? It exists and equals 4 It fails to exist because it is unbounded. It fails to exist because its one-sided limits are not ...
February 5, 2014

chemistry
6 part question 1. describe the appearance of a Bunsen flame that is getting insufficient air? 2. describe the appearance of a Bunsen flame that is getting too much air. 3. When inserting glass tubing into a rubber stopper, how far from the stopper should you hold the tubing? ...
February 5, 2014

chemistry
Two naturally occurring isotopes exist for the hypothetical element dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent a relative mass of 21.3 amu. What is the atomic mass of dippium? Please show the work thanks
February 4, 2014

Physics
An airplane moves away from a stationary observer at 125 m/s and emits a frequency of 595 Hz on a day where the temperature is 25.0°C. What frequency does the observer hear?
February 3, 2014

CHEMISTRY
The grams of protein in 1 cup of soup that has 110 Cal{\rm Cal} with 7 g{\rm g} of fat and 9 g{\rm g} of carbohydrate. Express your answer using one significant figure.
February 1, 2014

Science
A 15.3 kg object is dropped from an initial height of 33.5m above the ground. Find the speed when it hits the ground.
January 28, 2014

Finance
Kim Davis is in the 40% personal tax bracket. She is considering investing in HCA (taxable) bonds that carry a 12% interest rate. a. What is her after-tax yield (interest rate) on the bonds? b. Suppose Twin Cities Memorial has issued tax exempt bonds that have an interest rate...
January 27, 2014

ashford
All of the following are true of what typically occurs when first meeting someone EXCEPT: (Points : 1) First impressions are based mostly on facial appearance. We form our impressions of others within less than a second of meeting them. We form conclusions about a person’...
January 25, 2014

math
A car company charges $35 per day plus 20 cents per mile to rent a car. Write an equation to express the average cost per x mile.
January 24, 2014

math
Find a function that models weekly profit in terms of price per feeder.
January 23, 2014

Chemistry
Hey can anyone help me solve these questions 1. Balance K2Cr2O7 +H2C2O42H2O --> K[Cr(CrC2O4)2(H2O)2]2H2O +CO2+ H2O 2. Calculate the theoretical yield of the reaction mentioned above 3.What is the theoretical percentage by weight of Cr in the reaction mentioned above 4. Why ...
January 17, 2014

Physics
A cubical block of wood 0.100 m on a side and with a density 550 kg/m^3 of floats in a jar of water. Oil with a density of 750 kg/m^3 is poured on the water until the top of the oil layer is 0.035 m below the top of the block. 1. How deep is the oil layer? Please tell me the ...
January 17, 2014

Integral Calculus
A jeepney's velocity over time in ft/sec as it moves along the x-axis is governed by the function v(t)=3t^2-10t+15. If the jeep's position at t= 1 second is 8ft, what is the total displacement made by the jeepney from t=0 to t=5sec? please I need help, i just need the ...
January 12, 2014

physics
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?
January 10, 2014

Physics Please check my answer
Thank You!
January 10, 2014

Physics Please check my answer
How much work is done by the centripetal force (in this case, the friction between the tires and the road) on a 1200 kg car moving on a circular track of radius 50 meters at a constant speed of 31.4 m/s? A. 7.4 • 10^6 J B. 19.7 J <--- C. 2136.7 J D. 117,600 J E. 0 J
January 10, 2014

scice help!?!?!?!
11. D 12. I believe that this one is either D or B. I'm pretty sure this one is D too, though.
January 10, 2014

Physics
A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
January 10, 2014

Physics
I really need help with this problem. A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of ....
January 4, 2014

Physics
A billiard ball traveling at 6.25 m/s collides with a second stationary ball of equal size and shape causing the second ball to move at an angle of 25º with respect to the horizontal at a speed of 3.0 m/s.Both balls have a mass of .210kg. What is the impulse of both balls...
January 4, 2014

MATH
Owen has 20% more marbles than Danny. Danny has 40% less marbles than Connie. Owen has 21 marbles less than Connie. How many marbles does Danny have?
December 30, 2013

math
A tank contains 4L of water at first. Tap A is turned on and water from tap A flows into the container at the rate of 8L per minute. After 3 minutes, Tap B is turned on. Both taps are turned off together after another 5 minutes. If the total amount of water in the container is...
December 30, 2013

Math
Recall that the equation for the horizontal distance h in feet of a projectile with initial velocity v0 and initial angle theta is given by h=v0^2/16 sin theta cos theta . a. Assume the initial velocity is 60 ft/second. What initial angle will you need to ensure that the ...
December 6, 2013

Ashford
According to to scholars what is one way the advent of talking pictures changed the behavior of movie audiences
December 1, 2013

Astride university
What is the correct technical name for the music that plays in the background of a scene while the action takes place
December 1, 2013

finance
Find the amount of periodic payment necessary for the deposit to a sinking fund: A=50,000 n=semiannually , r=13%, t=15 yrs.
November 23, 2013

Statistics
Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the hormone maybe effective ...
November 21, 2013

Statistics
If the cases selected for one sample have no influence upon the cases selected for a second sample, then the samples are said to be: A) independent B) inconsistent C) dependent D) consistent A
November 21, 2013

math
I got it wrong. I don't understand why.
November 21, 2013

math
I have a question I have been working on since yesterday and I am not making this up. I couldn't get the right answer. If sin theta = -2/3, which of the following are possible? A: cos theta= -the sqr rt of 5/3 and tan theta =2/3. B: sec theta = 3/the sqr rt of 5 and tan ...
November 21, 2013

Intro to trigonometry
sorry I forgot to put my name.
November 20, 2013

Intro to trigonometry
If sin(theta) < 0 and tan(theta) > 0 then: in degrees. Ok I need help with this I couldn't understand the lesson and want to know how to do problems like this. Please help me by showing me step by step! Thank u in advance.
November 20, 2013

chemistry
if the %m/m of a solution of NaCl is 22%, how may grams of NaCl are present in 250g of solution?
November 19, 2013

Pre-Calc
A wrecking ball attached to a crane swings back and forth. The distance that the ball moves to the left and right of its resting position with respect to time is represented by the following graph.
November 15, 2013

Social Studies
WWI: Why would the Canadiens( Francophone) and the Maritime provinces be less interested in going to war in Europe than those Canadians of British heritage?
November 14, 2013

math
A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 4.9 * 10^2 µm. Find this earthquake's magnitude.
November 11, 2013

algebra
The atmospheric pressure P in pounds per square inch (psi) is given by P = 14.7 e^−0.21 a where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 12.17 psi, what is its altitude?
November 11, 2013

Stat
A bank is testing a new method for getting delinquent customers to pay their past-due credit card bills. The standard way was to send a letter (costing about $0.45) asking the customer to pay. That worked 30% of the time. The bank wants to test a new method that involves ...
November 11, 2013

algebra
Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.42 * 10^5 watts cm^2 what is the db?
November 11, 2013

math
solve: 2 ln e= ln sqrt of 7/x-2 ln e what would be x?
November 11, 2013

algebra 2 Please help
8x/6y divide by 2x/3y
November 10, 2013

math
2 ln e = ln sq rt. 7/x-2 ln e
November 10, 2013

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