# Posts by Lisa

Total # Posts: 3,425

chemistry
Stearic acid, nature's most common fatty acid, dimerizes when dissolved in hexane: 2C17H35COOH Picture (C17H35COOH)2; ΔH°rxn = -172 kJ The equilibrium constant for this reaction at 28°C is 2900. Estimate the equilibrium constant at 38°C.

geometry
The perimeter of rectangular playground is 200 feet. If the length is 5 feet less than twice the width, what are dimensions of the playground

english
im doing an essay on why success can be bad or change someobody for the worst & im using two celebrity examples. my first example is lindsay lohan. whats another example of a celebrity that has changed for the worst because or success, or a celebrity that success hasn't ...

Biology multiple choice question
If a randomly-mating population has an established frequency of 64% for the organisms homozygous dominant for a given trait, what is the frequency of this dominant allele in the gene pool? A. .2 B. .24 C. .36 D. .8 E. .64 I think the answer is D. .8

government

Government
I think its A

Math-properties
c(a*b) = (c*b)a Is this commutative, associative, or both? It feels like it is commutative since numbers change their order. However, it feels like it is associative, because different numbers are grouped together in the parenthesis. Is it possible to show two properties at once?

statistics
You are studying the rate of incidence of skin cancer in people who live near the equator. Your survey of 200 people from the area has shown that 7 of them developed skin cancer. Provide a 99% confidence interval for the true rate of incidence.

Calculus. I need help!
i don't know which one is match. i tried those problem. i couldn't solve it Find y' by implicit differentiation. Match the expressions defining y implicitly with the letters labeling the expressions for y'. 1. 7xsiny+2cos2y=2cosy 2. 7xcosy+2sin2y=2siny a. 7cosy...

English
misty could you walk ms. miller dog on tuesday mom asked

physics

physics
A box slides across a frictionless floor with an initial speed v = 1.8 m/s. It encounters a rough region where? If instead the strip is only 0.413265306122449 m long, with what speed does the box leave the strip? vf =

physics

physics
A horizontal force of magnitude F = 116 N is used to push a box of mass m = 9 kg from rest a distance d = 13 m? 1)How much work is done by the force on the box? WF = 2) How much work is done on the box by the gravitational force during this same displacement? Wg = 3) How much ...

Finance
assume a bank loan requires an interest payment of \$85 per year ans a principal payment of \$1000 at the end of the loan eighty year life.

Web Scripting
I'm using actionscript. when you press the mouse, you can draw (using a rectangle) and when you click the mouse it changes colors. What I need to do is have buttons so that a user can click on the button to choose the color they want. How can I do this?

COLLEGE CALCULUS.
i don't understand this problem Let F(x)=f(x^4) and G(x)=(f(x))^4. You also know that a^3=2, f'(a)=13, f'(a^4)=15. Find F'(a) and G'(a).

Chemisty
.588 g Na3Ag(S2O3)2

math
Hiroshi jogs less than 4 miles each day. After n days,he has jogged 16 miles. Which inequality can be used to find the number of days it might have taken Hiroshi to jog 16 miles.

Math
70 X __ =____ 100 450 So first we cross multiply 70*450 which is 31,500. Then we divide 31,500 by 100 and we get \$315 Now im not really sure if i got the write answer because im not sure if we have to ue proportion work.

picture frame laptop desk Book t.v pillow door

Math help needed
176 lbs is the same as 79.83 kg. The total amount of drug that this soul needs would be (50 mg / kg / day) * (79.83 kg) * (10 days) = 39,915 mg. With each tablet having 250 mg of drug, the number of tablets the party would need would be 39,915 mg / 250 mg = 42.66 tablets, or ...

science
speed and direction

science
false

Computer Programming (XML)
Using the employees.xml file below, create a DTD file â€œemployee.dtdâ€ based on â€œemployees.xmlâ€. Create a schema files â€œemployee.xsdâ€ based on â€œemployees...

math
Factor completely: 36t^2 + 49 - 84t

Math
what is the cube root of -1/64

Math
One-third of a number, decreased by thirty-six, is at most twenty-two. Find the number. Please help me

Math

Computers (XML)
employees.xml <?xml version="1.0" encoding="UTF-8"?> <employees> <employee> <first_name>Linda </first_name> <middle_name>P.</middle_name> <last_name>Jone</last_name> <home_phone>386-333-2321</...

programming
In order to share an XML file among different systems and programs, this XML file need to checked well, what are the two things to be done? /////////////////////////////////employees.xml//////////////////////////////////////////// <?xml version="1.0" encoding=&...

programming
In order to share an XML file among different systems and programs, this XML file need to checked well, what are the two things to be done? /////////////////////////////////employees.xml//////////////////////////////////////////// <?xml version="1.0" encoding=&...

Implicit Differentiation
Sorry. I meant the denominator from the quotient rule was never multiplied to the right or so. I don't see it. Where did that portion go?

Implicit Differentiation
I did this exactly with this question and i got the wrong answer. Use implicit differentiation to find the slope of the tangent line to the curve y/(x+5y)=x^3+5 at the point (x=1, y=6/–29). But I noticed after "we can continue..." the denominator was moved to ...

Physics
Suppose you wish to whirl a pail full of water in a vertical circle without spilling any of its contents. If your arm is 0.93 m long (shoulder to fist) and the distance from the handle to the surface of the water is 15.0 cm, what minimum speed is required?

Pre- Algebra
Add 5 to both side 7n=10n+18 Then subtract 10n -3n=18 Finally divide -3 on both sides n=-6

chemistry
How do you make a 3 m solution of kbr? How many moles of kbr are in 1 liter of a .03 m solution?

Math
Last Saturday Michaela rented 4 movies from the video store. This Saturday she rented 2 movies. Let x represent the cost of renting each movie. Write and simplify an expression for how much more Michaela spent last week renting movies. Please help me work this out thanks

Math

science
From the 1970s to the present, a shift in the evolution of public policy moved toward a New Federalism. How did this effect public policy? Was this positive or negative? Why?

Chemistry
How much heat is required to raise the temperature of a 65-g sample of water from 32 degrees celsius to 65 degrees celsius

Algebra
The officejet printer can copy sues dissertation in 16 minutes. The laser printer can copy the same document in 22 minutes. If the two machines work together, how long would they take to copy the dissertation?

Algebra
The officejet printer can copy sues dissertation in 16 minutes. The laser printer can copy the same document in 22 minutes. If the two machines work together, how long would they take to copy the dissertation?

Math

Math

algebra
Suppose that you can spend \$72 for compact discs and videos. Discs cost \$18 and videos cost \$9 each. write a system of inequalities that shows the various number of discs and videos that you can buy.

chemistry
a 7.500-mg sample of chromium-55 is analyzed after 14.0 min and found to contain 0.469 mg of chromium-55. what is the half-life of chromium-55

Geometry (Logic)
Which argument is not valid? 1.) Given: a→b a Conclusion: b 2.) Given: a˅b ~b Conclusion: ~a 3.) Given: a→b ~b Conclusion: ~a 4.) Given: a→b b→~c Conclusion: a→~c

algebra
Assume you work at a company where you are paid hourly. You are paid \$8.60 per hour for regular time (less than or equal to forty hours) and time and a half for overtime hours up to fifty hours in one week. If you are asked to work fifty or more hours in one week you are paid ...

Chemistry
What is the density of a gasoline sample that has a volume of 13.3 mL abd a mass of 8.86 grams?

Chemistry
What is the volume of 4.00 grams of air if the density of air at the time of the measurement is 1.19 g/l?

Statistics-Matrix of Transition Probabilities
Given the following matrix of transition probabilities, write three equations that, when solved, will give the equilibrium state values. P = large bracket with a b on top and c d directly under that, closed large bracket. Thanks.

math
9x-8y=-2

Algebra
11. The drama club is selling tickets to its play. An adult ticket costs \$15 and a student ticket costs \$11. The auditorium will seat 300 ticket-holders. The drama club wants to collect at least \$3630 from ticket sales. a) Write and graph a system of four inequalities that ...

physics
If you drop object,acceleration to groud is 10m/s2, if you throw it would it be greater than 10m/s2? (ignore air resistance) Why or why not?

Statistical Quality Control /UCL's & LCL's
THANK YOU, MathGuru, for your help!

Statistical Quality Control /UCL's & LCL's
PLEASE HELP me solve the following problem: A computer diskette manufacturer is concerned that some diskettes have bad sectors that would cause a diskette to hold less information that it was intended to hold. In the past, only 5% of these diskettes have had bad sectors. If ...

Math
A box contains 3 red marbles, 6 blue marbles, and 1 white marble. The marble are selected at random, one at a time, and are not replaced. Find the probability. P(blue and red) Please help me

Physics
but i don't have m...

Physics
A cannon is fired from a cliff 190 m high downward at an angle of 21° with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

alg2/trig
starting salary for a job is \$30,000 with a guaranteed raise of \$5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. please somone help!

Chemistry
A 5 gram sample of a hydrate of BaCL2 was heated, and only 4.3g of the anhydrous salt remained. What percentage of water was in the hydrate?

Quantitative Analysis Simulation Modeling
Define operational gaming and give an example.

math
Total purchase is: \$100.00 plus \$15.00, plus \$15.00 or \$130.00. \$130.00 minus the \$50.00 (gift card) leaves the customer with a balance of \$80.00 to pay before taxes.

math
\$22.00 - simply divide 66 by 3 (or 1/3)

trig
starting salary for a job is 30,000 with a guaranteed raise of \$5,000 each year for the first 5 years. write an explicit formula to represent how much money you would earn each year. how much money would you earn in the fifth year?

math
6 Student tickets X \$8.00 = \$48.00 \$78.00 minus the \$48.00 = \$30.00 \$30.00 divided by \$10.00 Adult Cost = 3 adult tickets.

math
a car traveling on a straight road at 20 meters per second accelerates to 26 meters per second in 12 seconds. what is the total distance traveled by the car? please help!

chemistry
A piper delivers 10.04, 10.02, 10.08, and 10.06 mL in consecutive trails. Find the mean volume and the average deviation from the mean...please help some responded but didn't answer the question.

chemistry
Can someone answer please Determine the boiling point of water at 698.5 mm Hg?

chemistry
Determine the boiling point of water at 698.5 mm Hg.

physics
A plane leaves Seattle, flies 77.0 mi at 22.0 degrees north of east, and then changes direction to 50.0 degrees south of east. After flying at 119 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle Airport facility dispatches a rescue ...

math
mallory emailed a funny cartoon to Ann. she told ann to send it to five friends with instructions for each of them to send it to five other friends. after four cycles of emailing,how many cartoons will have been sent? the answer is 156 but i don't know how to get thy ...

American Government POL 201
Locke" use of the term "property"

Biology
can you explain this in words?

Biology
What is the function of water in cellular respiration and photosynthesis? Detailed answer please

Biology
true

Physics
The

alg2/trig
what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.

trig
How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?

chemistry
A tank contains a mixture of 3.0 mol of nitrogen 2.0 mol of oxygen and 1 mol of carbon dioxide at 25 degrees and a total pressure of 10 ATM calculate the partial pressure in torr of each gas?

Electric
if you measure voltage with a multimeter are the leads of the circuit connected in a series or parallel its series right

Electric
measure resistance with a multimeter in a circuit is the power going to be off or on i think ON

algebra
use this 1/2(b1 + b2)

electricity
if you measure voltage with a multimeter are the leads of the circuit connected in a series or parallel its series right

electricity
measure resistance with a multimeter in a circuit is the power going to be off or on i think ON

electricity
1.2 volts RIGHT

electricity
how many volts does a nickel cadmium produce? VOLTAGE FOR ONE CELL

History
Of the social contract

History
Pelase help me by finding some examples out of this contract. Having undertaken, for the glory of God, and the advancement of the Christian faith and Houour of our King and Country, a Voyage to plant the First Colony in the Northern parts of Virginia, do by these presents ...

science
It's easier to understand It arranges elements according to various attributes

ELA
"It is only with the heart that one can see rightly" and my interpretation of this quote is that If you truly believe in yourself, you can make the right decisions. I need help to relate this quote to ROmeo and Juliet with an appropriate literary element.

math
Find the exact circumference of a circle with diameter equal to 8 ft. I know the answer is 25 ft but the answers I have to choose from are 8, 16 or 64

math
Find the exact circumference of a circle with diameter equal to 8 ft.

math
If you put one dollar a day in the bank and earn 20 percent interest per month, how much would you have in 100 years

english
38. Which of the following sentences contains a helping verb? (1 point) Eduardo looked in the basement, but the puppy wasn’t there. Sakkom hung wind chimes because she loves the sound. Roger has never performed a solo in his life. The leader of the troop took the scouts ...

Biology - Genetics
Please help me!!!! I need help with this practice test question. In Guinea pigs, the brown coat (B) is a dominant over the cream-coloured coat (b), and straight hair (H) is dominant over curly hair (h). Using a Punnett square, complete the cross between a heterozygous brown, ...

Math
Identify the outlier in the data set, and determine how the outlier affects the mean, median, mode and range of the data set. 7,7,4,9,6,26,4,5,8,4 Please help me

basic electricty
Two Ways Of Decreasing The Current In A Circuit? IS it this pentiometer and ampostat or this Yep, lower the voltage or increase the resistance.

BASIC ELEC
NAME THE 5 REQUREMENTS NECESSARY TO HAVE A SAFETY OPERATING ELECTRICAL CIRCUIT 1. CONDUCTOR 2. RESISTOR 3. SWITICH 4. CIRCUIT BREAKER IS THAT CORRECT? NAME 4 CONDUCTORS OF ELECTRICITY 1. COOPER 2. ALUMINIUM 3. BRASS 4. IRON IS THAT CORRECT ? WHAT ARE THE 4 FACTORS AFFECTING ...

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