Wednesday

March 4, 2015

March 4, 2015

Total # Posts: 2,219

**college calculus**

the amount of carbon-14 in a mammoth's bone is 45% of the amount found in a living organism. How long ago did the mammoth die? the half-life of carbon-14 is about 5,730 years.
*May 22, 2014*

**math**

1. C 2. C 4. B 8. B
*May 22, 2014*

**math**

1. The cost of a regular price to Saint Louis Cardinal baseball was $60. During the World Series, the price increased by 2/5. What did the fans pay? A. $65 B. $84 C. $80 D. $69 my answer is D 2. Abby is touring China for four days. The rental is $38.15 per day plus 12 1/2 ...
*May 22, 2014*

**chemistry**

The volume of a gas is 150 mL at 240.0 kPa pressure. What will the pressure be when the volume is reduced to 100.0 kPa, assuming the temperature remains constant?
*May 21, 2014*

**Algebra 2**

what is the exact value of cos 5pi/3 radians
*May 21, 2014*

**Algebra 2**

Given the point A(2,-1) on the terminal side of angle 0, what is the value of the cosecant of angle 0?
*May 21, 2014*

**Math**

identify the vertex and the length of the transverse axis is 10 units, and the length of the conjugate axis of the hyperbola x^2/25-y^2/16=1
*May 21, 2014*

**Algera**

identify the vertices, the co-vertixes, and the foci of the ellipse x^2/4+y^2/9=1 A. the vertexes are (0,2) and (0,-2). The co-vertexes are (3,0) and (-3,0). The foci are ((0, 3√5) B. The vertex ices are (0,3) and 0.-3). The co-vertex are (2,0) and (0,-2). the foci are (...
*May 21, 2014*

**math**

1 identify the coordinates of the vertex and the equation of the axis of summetry of the parabola x=2 (y-1)^2+3 A. The vertex of the parabola is (1,3), and the equation of the axis of symmetry B. the vertex of the parabola is (3,1) and the equation of the axis of symmetry c. ...
*May 21, 2014*

**math help**

Identify the center and radius or the circle with the equation. (y-5)^2+(Y+8^2=25
*May 20, 2014*

**math**

identify the center and radius or the circle with the equation (x+2)^2+(y-3)^2=4
*May 20, 2014*

**Math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x^2 + 9x + 3.
*May 19, 2014*

**math**

Use the binomialsl theorem to find the binomial binomialsion of the expression (x-3)^5
*May 19, 2014*

**Algebra**

there are 10 students in a social studies class. three students will be selected to present their term projects today. In how many different orders canthree students be selected?
*May 19, 2014*

**Math**

Which cosine function has maximum of 0.5, a minimum of -0.5, and a period of 2pi/3?
*May 19, 2014*

**Algebra 1B**

How do you write x³ = 100 in log form?
*May 14, 2014*

**social studies 9**

are there any other reasons why?
*May 13, 2014*

**social studies 9**

Why do you think Brant and others of the Six Nations distrusted the Americans?
*May 13, 2014*

**social studies 9**

can you explain that a little better?
*May 13, 2014*

**social studies 9**

why would Brant and the Mohawks, the Iroquois, and others, would choose an ally themselves with the British in the revolutionary war.
*May 13, 2014*

**social studies 9**

thanks for your help!
*May 13, 2014*

**social studies 9**

can someone help me?
*May 13, 2014*

**social studies 9**

I don't understand the question.
*May 13, 2014*

**social studies 9**

Find out Joseph Brant's Mohawk name. How did he get the name "Joseph Brant"? Why do you think Joseph Brant was able to establish diplomatic links with the British to the extent that he did?
*May 13, 2014*

**Math**

A square has an area of 13ft^2 To the nearest tenth, what is its perimeter ?
*May 12, 2014*

**Algebra 1B**

f(x) = -7x^2 + 3x + 5.What is the appropriate values when solving? I just do not understand help please
*May 10, 2014*

**Calculus**

Given f'(x)=9/2x(3x^2+2)^1/2 (this is the derivative of y= sqrt[(3x^2+2)^3]) , state any values of x for which the function is not differentiable
*May 10, 2014*

**calculus-answer check**

Deermine the derivative of f(x)=[(3x^2+1)^3+1]^2. Express your answer in simplified form. For this I got 54x^6+162x^5+54x^4+108x^3+18x^2+18x+2
*May 9, 2014*

**Calculus **

If y=u^3+u^2-1, where u=1/(1-x), determine dy/dx at x=2
*May 9, 2014*

**Calculus **

1.a)Determine dy/dx if y= sqrt[(3x^2+2)^3] For this question, I got 9/2x(3x^2+2)^1/2 as my answer. b)State any values of x for which the function is not differentiable
*May 9, 2014*

**Calculus**

Let s(t)=-5t^2+40t be the position equation for a rock thrown upwards. At what time t, in seconds, will the rock change directions?
*May 9, 2014*

**calculus-answer check**

1. Determine the slope of the tangent to the graph of y=4/x at (1,4) my answer is -4 2.What is the slope of the line perpendicular to y=(x-2)/(x+2) at (2,0) my answer is -4 3. For which value of x is the derivative of f(x)=(x-1)^10(x+2)^5 equal to 0? my answer is 1
*May 9, 2014*

**calculus-answer check**

thanks!
*May 9, 2014*

**calculus-answer check**

Determine the slope of the tangent line to the curve y=(x^2+3x)(x^2-2) at x=-1. I got 3 as my answer although I am not too sure that it's correct. I found the derivative of the function and then substituted -1 into the equation.
*May 9, 2014*

**Calculus answer check**

thanks!
*May 9, 2014*

**Calculus answer check**

Starting from rest, a man runs 10 metres along a straight path in t seconds. His position can be described by the function s(t)=0.7t^2. How long will it take him to reach the velocity of 4m/s? would the answer be 5.6 s? I started with s(t)=0.7t^2, then the velocity is 7/5t and...
*May 9, 2014*

**Calculus**

I meant to write the equation like this: f(x)=(1/3)x^3-x^2+x-1 when x=1
*May 9, 2014*

**Calculus**

write the equation of line tangent to f(x)=(1/3x^3)-x^2+x-1 when x=1
*May 9, 2014*

**english**

one of the artists said him painting were at gray gallery
*May 8, 2014*

**math**

write a diameter if 8-pound test line in words and as a fracion
*May 1, 2014*

**Math 4 grade**

Thanks How is your work?
*April 30, 2014*

**Math 4 grade**

Yes
*April 30, 2014*

**Math 4 grade**

How much is one cola? Use the clues to find out. -The cost is between 20€ and 30€ -You can buy one cola with exactly 6 coins. -You can buy two colas with exactly 6 coins. -You can buy three colas with exactly 6 coins. -You can use pennies, nickels, dimes, or quarters...
*April 30, 2014*

**social studies 9**

Pros and cons of the Quebec Act
*April 29, 2014*

**social studies 9**

The 1763 Royal Proclamation
*April 29, 2014*

**social studies 9**

Why do you think the government has downplayed the Royal Proclamation in regard to land claims? I don't understand the question.
*April 29, 2014*

**social studies 9**

Why do you think the government has downplayed the Royal Proclamation in regard to land claims?
*April 29, 2014*

**Helpppp Math!!!**

The market value (in thousands of dollars)of a certain home is a linear function of t, the time in years since 1990. In 1992 the market value was 68 thousand dollars, while in 1997 the market value was 79 thousand dollars -Find the slope of V as a linear function of t. Explain...
*April 29, 2014*

**Math! Helppppp**

Two poles are place 15 feet apart. One pole is 8 ft high and the other pole is 16 ft high. The top of each pole is attached to the base of the other by cable which run in a straight line. -Find the slopes of the lines defined by the two ropes. -How high above the ground is the...
*April 29, 2014*

**algebria**

Suppose the population of deer in a state is 10,280 and is growing 1% each year. Predict the population after 5 years
*April 25, 2014*

**Psychology**

Is Gender a social construct referencing cultural behavioral expectations for men and women
*April 18, 2014*

**Psychology**

Changes based on biological and psychological forces are functions of
*April 18, 2014*

**geometry**

the set of lessons in this geometry course is:
*April 17, 2014*

**calculus help**

explain fully what trick you must use in order to us L'Hospital's rule for indeterminate powers?
*April 16, 2014*

**chemistry help~~~~ Please!!!**

Sodium-24, t1/2 = 15.0 hr, can be used to study the sodium balance in animals. If a saline solution containing 25 μg of 24^Na is injected into an animal, how long can the study continue before only 1 μg is left? Show work please!
*April 14, 2014*

**chem 101**

How many kilojoules of heat are needed to completely vaporize 42.8 g of C4H10O at its boiling point? Given Hvap=26.5kj/mol
*April 14, 2014*

**algebra**

Ln(x+3)- Ln(x-5)=Ln7
*April 13, 2014*

**algebra**

In 1990, the population of Africa was 643 million and by 2000 it had grown to 813 million. a.) Use the exponential growth model A=A0 e^kt, in which t is the number of years after 1990, to find the exponential growth function that models the data. b.) By which year will Africa ...
*April 13, 2014*

**Calculus Help Please!!!**

A radioactive substance has a half-life of 4 days. Suppose we have 800 mg of this substance. a) Find the equation of the mass remaining after t days. Use the exact value for k not a decimal approximation. b) Rounding your answer to the nearest tenth of a mg, find the mass ...
*April 9, 2014*

**financial management**

Post your response to these questions: A budget systems model is the foundation from which budgeting systems can be used to evaluate the success of an agency or company. How are performance budgeting systems used to evaluate the efficiency and effectiveness of a human service ...
*April 7, 2014*

**social studies 9**

explain why the mohawks and the other first nations would choose to become allies with europeans, even though they knew that all the europeans were a threat to their territory and way of life
*April 3, 2014*

**math**

Find the foci x^2/49 + y^2/36 = 1
*April 2, 2014*

**Calculus Help Please!!!**

Find the absolute maximum and absolute minimum values of f on the given interval. f(x) = xe^((−x^2)/98), [−6, 14]
*April 1, 2014*

**social studies 9**

thank you
*April 1, 2014*

**social studies 9**

why are people who are attached to religious orders ideally suited to leave their home country and take residence in a new land
*April 1, 2014*

**Calculus Help Please!!!**

Compute Δy and dy for the given values of x and dx = Δx. (Round your answers to three decimal places.) y = 3x − x^2, x = 3, Δx = −0.6 Δy=???
*March 30, 2014*

**Math **

for the function y=-(1)/(x-3/4) describe the intervals where the slope is increasing and where its decreasing
*March 30, 2014*

**Calculus Help Please!!!**

A water trough is 5 m long and has a cross-section in the shape of an isosceles trapezoid that is 30 cm wide at the bottom, 70 cm wide at the top, and has height 40 cm. If the trough is being filled with water at the rate of 0.1 m3/min how fast is the water level rising when ...
*March 30, 2014*

**Chemistry Help Please!!!**

What is the greatest source of error for the hydrolysis of salts and pH of buffer solutions lab?How would you minimize this source of error?
*March 29, 2014*

**Math for grade 6 peace**

The computer club is having a fundraiser to help pay for a trip to the science museum. So far they have raised $96, which is only 48% of their goal. How much money are they trying to raise?
*March 28, 2014*

**math**

Thanks for answering!
*March 28, 2014*

**math**

Kara eats 4/5 of the food that Jillian does. If kara needs to bring 14lbs of food for the week, how much does Jillian need to bring.
*March 28, 2014*

**math**

How do you find the area of a circle with a diameter of 26 feet???
*March 21, 2014*

**Calc Help :(((((**

I got up to here. f'(x)= 3(x+3)^2(x8)^5(d/dx(x))+5(x+3)^3(x-8)^4
*March 12, 2014*

**Calc Help :(((((**

Find the derivative of the following function showing your work and fully simplifying your answer. Show steps please! Thank you!!!!!! f(x)=(x+3)^3(x-8)^5
*March 12, 2014*

**Calculus Help**

A model for the length of daylight (in hours) in Philadelphia on the tth day of the year is L(t) = 12 + 2.8 sin[(2π/365)(t − 80)]. Use this model to compare how the number of hours of daylight is increasing in Philadelphia on March 21 and April 21. (Assume there are...
*March 9, 2014*

**Calculus **

for what values of r does the function y=e^rx satisfy the differential equation y''-4y'+y=0 Show steps please! Thank you!
*March 7, 2014*

**social studies 9**

Create a dialogue between a Huron chief and a Jesuit missionary in which both present their best arguments for and against allowing the Jesuits stay and work in Huronia.
*March 6, 2014*

**social studies 9**

What social values would have led Jacques Cartier to kidnap the sons of the Iroquois host at the Gaspe Peninsula and take them to Europe?
*March 6, 2014*

**HELPPPP NOOWW !!!!!**

her she I I them indirect object of preposition none of above hers his yours its
*March 4, 2014*

**banking**

Suppose you borrow $5,000 and make 12 equal payments to retire the debt. If the finance charge for the loan is $400, what will the amount of each monthly payment be?
*March 3, 2014*

**banking**

If 6 percent of all credit card charges never get paid, and total credit card charges last year were $750 billion, what was the total amount of unpaid credit card charges last year?
*March 3, 2014*

**Banking**

Becky has a balance of $2,000 on her credit card. Her minimum payment is $40 on a card with an APR of 17 percent. How much of that payment will go toward paying the interest?
*March 3, 2014*

**chem**

How many moles of CO2 are produced from 0.160mole O2?
*March 3, 2014*

**statistics**

the average score on the statistics quiz was a 70, and there was a standard deviation of 10 points. If the z-socre was -1.0 what is the percentile rank?
*March 2, 2014*

**Science**

Type webelements in your search box, and that website will give you all the kind of information of all kinds of elements. Just click: Chemistry » Periodic Table » essential data and description
*February 28, 2014*

**Help!**

I think; I believe it's C. The new director promised to restore order in the department
*February 28, 2014*

**Math **

Determine an equation in simplified form, for the family of quadratic functions with zeros -1 -+ √5 and 2 -+ √2 B) determine an equation for the member of the family whose graph has a y intercept of -32
*February 24, 2014*

**math**

A school spent $1,802 on 6 new microscopes for science classes. Each microscope cost the same amount of money. Find the cost of 1 microscope. Show your work.
*February 22, 2014*

**Math**

Make a systematic list - PSM 81 - page 19 Carla and Nick were playing a factors game. Carla would name a factor of 48 and Nick would give the other factor. Make a table to show the different way Carla and Nick could play the 48 game. Please help. -- someone know what the book ...
*February 18, 2014*

**chemistry**

a metal object has a mass of 8.37g. when it was placed in a graduated cylinder containing 20.0ml of water, the water level rose to 23.1 ml. what is the density and identity of the metal?
*February 16, 2014*

**Art-plz check!!**

1. Mount Rushmore 2. a message of fear and power 3. use of an icon 4. Kente 5. haik 6. art movement 7. both b and c 8. romantic 9. scale drawing 10. atmospheric perspective
*February 13, 2014*

**statistics**

A false positive rate of 5% is considered to be a conservative estimate. Suppose that there are 20 employees in your company, which tests its workers weekly. What is the probability of no false-positives for this week’s test?
*February 12, 2014*

**english**

In the metaphor of language as a layer cake given in your study unit, which of the following words could be considered to be a frosting word?
*February 12, 2014*

**Math**

The sum of two numbers is 30. The first number is 1/5 the second number. What are the numbers
*February 11, 2014*

**science**

A ball weighing 1.78 N is shot through a launcher,achieving a speed (from rest) of 41 m/s in 0.28s. What is the mass of the ball.
*February 3, 2014*

**math**

Seven students took a quiz. Four of these students received a score above 85 percent. Students who received at least an 85 percent got a sticker. What percent of the students (rounded to the nearest full percentage number) received a sticker?
*January 21, 2014*

**math**

51.A sequence t is defined where the first term is –4. Each successive term is 3 more than the term before it. (a)Write an explicit formula for the sequence t. (b)A second function is defined as s(n) = 2 + 2n. Compare the rates of change of t(n) and s(n). (c)For what ...
*January 2, 2014*

**Algebra 1B**

The polynomial given by 1.6t^ 2 - 28t + 200 calculates the heart rate, where t represents the elapsed time in minutes since exercise stopped. 1. What is the heart rate when the athlete first stops exercising? 2. What is the heart rate after 5 minutes? 3. Describe what happens ...
*December 22, 2013*

**chemistry**

thanks KS, 31 is A
*December 19, 2013*

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