# Posts by Brit

Total # Posts: 149

PreCalc
I'm sorry I meant sin

PreCalc
Verify the Identity. cos^4xcsc^2x = csc^2x + som^2x - 2

Physics
3. Consider a freely falling object. a. What is the acceleration (in m/s2) after 5 seconds of fall? b. What is the acceleration (in m/s2) after 10 seconds of fall? c. What is the velocity (in m/s) after 5 seconds of fall? d. What is the velocity (in m/s) of 10 seconds of fall?

Pre-Algebra
Matthew is 5 years older than twice the age of his sister. If Matthew is 13, how old is his sister? 3 4 9 31 I think she is 3 or 4

science
the density of water approximately 1.00 g/mL. Would the piece of wood in the previous question (#1) float or sink

chem
How many moles of H2O are needed to react with 15.0g of CaO forming Ca (OH)2 CaO + H2O --> Ca (OH)2

chemistry
Calculate the freezing point of 0.5 g of biphenyl in 20.0 mL of cyclohexane. Cyclohexane Fp = 6.5 degrees C Kf 20.01

SS
For the question is this good? In Afghanistan and Pakistan democracy is weak. Elected governments in both Pakistan and Bangladesh have been usurped by military coups. In Pakistan and Afghanistan are committed to the Islamic law which can hurt the people. In Bhutan democracy ...

SS
could you tell me which country in south asia has the strongest and weakest democracies and why

SS
Monitor the strength of democracy in the eight countries of South Asia by looking at the fairness of most recent elections, the existence of a free press, the strength of the judiciary, and the depth of involvement of the nations’ citizens. Explain which country has the ...

SS
could you explain democracy in south asia

Math
Julia spends 5/9 of her vacation at summer camp. She spends 3/4 of the remaining time at her grandparent's home. The remaining 7 days she spends at the seashore with her family. How many days of summer vacation does she get each summer?

Language arts
which of the following is part of the novels rising action? A. johnny's growing role delivering messages and acting as a spy for the whigs B. Dr. Warrens imminent surgery on johnnys hand C. The battle on the Lexington green on the morning of April 19, 1775 D. Rabs death in...

History
What was one way in which african Americans helped the revolutionary war effort? A. They convinced native Americans to join the army B. They joined with women's groups to write petitions C. They protested the war outside british parliament D. They raised and contributed ...

History
Which of the following correctly describes the flow of commodities in the triangle trade? A. Cubas rum is traded for slaves in New England. The slaves are brought to Cuba to grow sugar. Cuban sugar is exported to New England, where it is distilled into rum B. New England's...

English
How has the political climate of boston changed since the beginning of the book? A. Previously, Bostonians considered themeselves loyal british subjects, but after parliament pass the tea act, they thought of themeselves as citizens of an independent nation B. Previously, ...

Math
Simplify the expression. 3x + 4(x - 6) - 3(x - 7) A. 4x - 45 B. 4x - 3 C. 10x - 3 D. 10x + 45 Is it b?

Language arts
Which of the following is the most significant event in the plot following Johnny's accident? A. Johnny realizes that Rab and his uncle are Whigs. B. Rab teaches johnny how to ride goblin. C. Mrs lapham recruits mr. Tweedie to replace johnny in the silversmith shop D. With...

algebra
A boat can travel 29 mph. If it travels 217 miles with the current in the same lenght of the time it travels 189 against the current? What is the current

Health Part 2
Were they right

chemistry
You have a 1.0 M stock solution of H2SO4 in a large flask. You need to dilute this to make a 0.25M solution of H2SO4 for an experiment. If you need exactly 100.0mL of the diluted solution, how would you make the diluted solution?

Health
f a patient is unemployed, it may be helpful to provide ________ along with addiction treatment. A. Anger management B. Career counseling C. 12-step program D. Marriage counseling is it B? or is it C? i am so stuck on this one

ECCE
Connectionist models provide evidence that a) infants begin life with special-purpose knowledge systems. b)neural networks are initially weak, sufficient only to support looking behavior. C) connections between units change very little with age

geometry
Please use this for the portfolio. You will need graph paper. 1. Start with Triangle ABC with vertices: A(0,2), B(2,5), C(3,0) 2. Find slope of side AB and BC 3. Now TRANSLATE the Triangle 4 units left, and 2 units up (x-4,y+2) and give the new vertices to find A', B'...

algebra
15/8

College Chemistry
In your experiment you weigh out 0.995 g NaHCO3. How much 1.0 M HCl should you add to get the most NaCl?

research has shown that most preschoolers
a)don't use the words think,remember, or pretend. b) believe that an event can be known without being directly observed c) often insist they've always known information they just learned

math
if the expression(2ya)4 is equivalent to 16y8 what is the value of a

BT
What's the shortcut of sane in stenography?

algebre
The number of customers that visit a local small business is 51,200 and has been continuously declining at a rate of 3.8% each year. What is the approximate number of customers that visit the business in 14 years?

Child day care
The staff-to-child ratio is a factor that's very important to high-quality child care, but not often covered in state licensing regulations.

Chemistry
Calculate the maximum mass of calcium metal that should be used in an equivalent mass determination, with a 100 ml gas measuring tube for collection. Assume 80 ml of hydrogen gas at standard conditions for the purposes of calculation.

chemistry
A 1.70 g sample of a certain metal reacts with acid to liberate 380 mL of hydrogen gas, when collected over water at 20 Celsius and over 720 torr. What is the equivalent mass of the metal?

Chemsitry
Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of grams of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)

Chemistry
The answer is 1.3 grams of CaCO3. I am not getting that by multiplying mols CaCO3 x molar mass CaCO3.

Chemistry
Stomach acid is essentially 0.10 M HCl. An active ingredient found in a number of popular antacids is CaCO3. Calculate the number of CaCO3 needed to exactly react with 250 mL of stomach acid. CaCO3(s)+ 2HCl(aq)= CO2(g)+ CaCl2(aq)+ H20(l)

chemistry
idk

physical science
The primary voltage is still 120 V and the number of primary turns = 60, but now the power in the primary side is 3000 Watts and there is a 120 ohm resistor connected to the secondary. Find the current in the resistor, and the secondary voltage and # turns.

shoshone
A bicycle tire decoration covers 1/9 of the circle formed by the tire. If the tire has a diameter of 26 inches, what is the area of the decoration?

B and C is switched anwsers

A 3.00 kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform 8.00 kg cylindrical pulley. The inner diameter of the pulley is 60.0 cm, while the outer diameter is 1.00 m. The system is released from rest, and there is no friction at the axle of the...

English
infinite

physics
a 20 kg crate is initially moving down a wall at a speed of 2.0 m/s. Determine the magnitude of the average force exerted by the person in order to stop the crate's downward motion in a distance of .50 m. The person pushes in a direction 53 degrees above the horizontal, ...

statistics
25% of the students in an English class of 100 are international students. Find mean, and standard deviation of this binomial distribution

trig
Patients with acute or serious infections, such as Salmonella typhi or gram-negative bacteria causing meningitis, can be successfully treated with regular doses of Chloramphenicol. A patient weighing 150 pounds requires a dose of 850 milligrams, while a patient weighing 300 ...

math
A farmer plans to enclose a rectangular region, using part of his barn for one side and fencing for the other three sides. If the side parallel to the barn is to be twice the length of an adjacent side, and the area of the region is to be 512 ft2, how many feet of fencing ...

Calculus :)
Use the substitution x=2tan(theta) to evaluate the indefinite integral 53dx/(x^2sqrt(x2+4))

Calculus :)
For the function f(x)=1/(x+1), verify f(x) is one-to-one, then calculate f^-1 (1/4) and (f^-1)' (1/4)

Calculus :)
nevermind got it

Calculus :)
If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest is compounded monthly ____

Calculus :)
i don't understand how you set up the equation. what formula do you use for #1 & #3? please and thank you :)

Calculus :)
If 8000 dollars is invested in a bank account at an interest rate of 10 per cent per year, find the amount in the bank after 11 years if interest is compounded annually ____ Find the amount in the bank after 11 years if interest is compounded quaterly ____ Find the amount in ...

Calculus :)
The number of bacteria in a culture is modeled by n(t)=1550e^(0.24t) (a) The initial number of bacteria is _____ (b) The relative rate of growth of this bacterium population is _____ (c) The number of bacteria after 3 hours is _____ (d) After how many hours will the number of ...

Calculus :)
Find the volume of the solid formed by rotating the region enclosed by y=e^(3x)+2, y=0, x=0, x=0.4 about the x-axis.

CALCULUS:)
The region between the graphs of x=y^2 and x=6y is rotated around the line y=6. The volume of the resulting solid is ____?

CALCULUS:)
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=x^2, x=y^2 about the axis x=–3

CALCULUS:)
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. x=3y^2, y=1, x=0 about the y-axis.

CALCULUS:)
Find the volume of the solid formed by rotating the region enclosed by x=0, x=1, y=0, y=9+x^4 about the x-axis.

CALCULUS:)
-4?? that is incorrect..hmm, what am i doing wrong?

CALCULUS:)
its not 8

CALCULUS:)
Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=3sqrtx and y=3 and 2y+2x=5

Calculus:)
Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1

Calculus:)
Find the area of the region enclosed by y−2x^2≥0 and |x|+|y| ≤ 1

CALCULUS:)

math
Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now? Numerical Answers Expected!

PHYSICS-URGENT HELP
The answer said it was 7.02 m/s and not 14.3 m/s

PHYSICS-URGENT HELP
A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is traveling either directly towards or directly away ...

Calculus :)
A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola y=6–x^2. What are the dimensions of such a rectangle with the greatest possible area? Find Width=____ & Height=4 just need to find width.. is not 2

CALCULUS :)
find y' of y=sinθ tanθ sqrt(θ^3)

Calculus
Given f'(x)=7cosx–11sinx and f(0)=1, find f(x)= ____?

CALCULUS!
I understood the first two questions and got them right. But can't get the last.... "What is the smallest value of x at which f(x) intersects its non-vertical asymptote? ___?"

CALCULUS!
f(x)=(6x^3–9x^2–3x–1)/(4x^2+7x–3) . Find the equation of the non-vertical asymptote. y = ____3x/2 - 39/8_____ Does f(x) intersect its non-vertical asymptote? (yes or no) ___YES____ What is the smallest value of x at which f(x) intersects its non-vertical ...

CALCULUS!
Consider the function f(x)=4x^3–2x on the interval [–2,2]. Find the average or mean slope of the function on this interval. __14__ By the Mean Value Theorem, we know there exists at least one c in the open interval (–2,2) such that f(c) is equal to this mean ...

bio chem
What is the ph when 100 mL of 0.1 M NaOH is added to 150 mL of 0.2 M Hac if pka for acetic acid =4.76?

integrated science
explain pressure relations for air

medical claims and billing
you must be taking the exact test i am right now :) That is what i came up with.

math
how do i solve the problem of _____________________________ 0 14 20 i have to find out what the percentage is

Honor Stoichiometry
2AgNO3 + BaCl2 ==> 2AgCl + Ba(NO3)2 How many grams of silver chloride are produced from 5 g of silver nitrate reacting with an excess of barium chloride?

Chemistry
A 500.0 g-sample of aqueous hydrogen peroxide (H2O2) contains 31.50% H2O2 by mass. a. Find the mass of hydrogen peroxide in the solution b. Find the mass of water in the solution

Chemistry
At 25C and 1.0 atm, 0.25 g of a gas dissolves in 1.00 L of water. What mass of the gas dissolves in 1.00 L of water at 25C and 3.0 atm?

algebra I
What is the expression for "the difference between five times a number and twice that number"?

chemistry
What is the volume, in mL of .089 m lithium chloride (LiCl) solution containing 4.3g of LiCl???

chemistry
What is the volume, in mL of .089 m lithium chloride (LiCl) solution containing 4.3g of LiCl???

social studies
i need help with a acrostic for maryland

Texas History
What mexican actions led to further conficts with settlers? It was around 1830

Texas History
I read that but don't exactly understand

Texas History
How did the law of April 6,1830 change relations betweens Texas and the Mexican government?

chemistry
What metals are suitable for use as the cage around the magnesium metal?

chemistry
How many grams of H2(g)can theoretically be produced from a 5-g sample of magnesium metal and excess HC1(aq)?

physics
I did what Bob did and got 134 rpm, which is wrong and crazy fast, but Jay's answer is only twice what the answer should be. What did you do?

chem 30
not on me sadly it is at school.

chem 30
how do you find solubility of Pb(NO3)2, PbCl2, PbCrO4, and PbS

Chemistry
is it 0.6527 J?

o What are the advantages of the four different special journals? When would you use each type? o What is a subsidiary ledger and what purpose does it serve? o What is a control account and what purpose does it serve? o Which two general ledger accounts may act as control ...

phYsics
Sorry no help is online right now, and i cant help you on this one. Sorry!

chemistry
I hope you get it, im getting off.

chemistry
I never used those numbers, and you got the 32.06 because you need to divide each number by the smallest number of moles.

chemistry
There is no need for you to have K=C=273 because you have nothing in Celcius. But 1000k is 24.40 and the pressure is at 0 atm Ok Ip-4.775 SO3 grams 1000k is 24.40 Your looking for percent compisition. So you have to get S-32.066x1= 32.06/32.06=?? O-16.00x3= 48/32.06=?? Then ...

English
Number 5 is Grammatical, Because of the "such".

Chemistry
Okay so you have to first balance them and then count how much you added or minus in each equation.

1. Pages:
2. 1
3. 2
4. Next>>