# Posts by Maria

Total # Posts: 1,981

**reading**

In the book Rachel Carson I'm suppose to agree or disagree about "a person can be a professional scientist or writer but rarely both".the chapter is 3 it says use details and examples from the chapter to support your decision and it's hard for me and I don&#...

*February 6, 2014*

**math**

I guess it's $48

*February 6, 2014*

**Biochemistry**

A buffer solution is prepared by mixing 2.50 mL of 2.00M sodium acetate with 3.30mL of 0.500M HCl and diluting the buffer with water to a final volume of 500.0mL. pK acetic acid: 4.76 what is ph of buffer? what is final concentration of buffer?

*February 4, 2014*

**Math**

Xyz rents a car for $45 and .25 per mile. Cloud rents a car for $35 and .30 per mile. How many miles would a driver need to drive before the cost of renting a car at xyz and cloud be the same

*February 3, 2014*

**chemistry**

A 0.25 kg length of aluminum wire is warmed 10.0°C by an electric current. How much heat was generated by the current?

*February 3, 2014*

**spanish**

4) ciclismo

*January 31, 2014*

**spanish**

3) equipo

*January 31, 2014*

**language arts, plays**

Thank you, Ms. Sue.

*January 30, 2014*

**language arts, plays**

On October 1, 1956, The Diary of Anne Frank opened simultaneously in seven cities in Germany. At the end of the play, the audience sat silently without applauding. Not long after the play’s opening, Germans began openly expressing remorse for the Holocaust. This was an ...

*January 30, 2014*

**Science**

Which of the following determines the type of biome classification that will be made for a particular reason? a. Climate* b. Size c. Mineral deposits d. Number of human settlements

*January 30, 2014*

**Physics**

A jetliner, traveling northward, is landing with a speed of 60 m/s. Once the jet touches down, it has 795 m of runway in which to reduce its speed to 5.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...

*January 24, 2014*

**Calc**

Let f(x)=sqrt(x) and g(x)=sin(x). Find f*g and determine where f*g is continuous on the interval (-4pi, 4pi)

*January 13, 2014*

**Algebra 2..**

Divide -2x^3+21x^2-20x-12 by (x-3) Please explain.

*January 13, 2014*

**Algebra 2 help!**

Divide -2x^3+21x^2-20x-12 by (x-3)

*January 13, 2014*

**Algebra 2 help...**

A half life of a certain radioactive is 36 days. An initial amount of the material has a mass of 487 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 5 days. Round your answer to the nearest thousandth.

*January 10, 2014*

**Algebra 2 help!!!**

Let f(x)=x^2+7 and g(x)= x+3/x. Find (g f)(-5) A.35/12 B.35/32 C.32/35 D.11/25

*January 10, 2014*

**HEALTH**

C. 12

*January 10, 2014*

**Algebra 2**

Find the rational roots of x^4+3x^3+3x^2-3x-4=0. A.0,1 B.1,2 C.1,-1 D.-1,2

*January 9, 2014*

**Dont get this question..**

what are the zeros of the function? y=(x-3)(x+2)(x-2) a.-3,2,-2 b.-3,2,2 c.3,-2,2 d.3,2,2

*January 9, 2014*

**Algebra help please!**

Use the quadratic formula to solve the equation. -x^2+5x=3 a.5/2 +- sqrt13/2 b.-5/2 +- sqrt13/2 c.2/5 +- sqrt13/2 d.-2/5 +- sqrt13/2

*January 9, 2014*

**Algebra 2 help!**

the equation i posted is the equation i have to use.

*January 9, 2014*

**Algebra 2 help!**

Use the quadratic formula to solve the equation. -x^2+5x=11 a.5/2 +- sqrt13/2 b.-5/2 +- sqrt13/2 c.2/5 +- sqrt13/2 d.-2/5 +- sqrt13/2

*January 9, 2014*

**Algebra 2**

What value completes the square for the expression x^2-16x? a.-64 b.64 c.32 d.-32

*January 9, 2014*

**Algebra 2**

Which matrix represents the system of equations below? -10x-9y+13z=12 8x-7y-5z=15 5x+4y-6z=-12 a. -10,-9,13 8,-7,-5 5,4,-6 b.-10,-9,13 8,7,5 4,4,-6 c.-10,8,5 -9,-7,4 13,5,-6 d. 10,8,5 9,-7,4 13,5,-6

*January 9, 2014*

**English**

Yes I am talking about "O Captain, My Captain" I have not found anything yet

*January 5, 2014*

**English**

Identify all the descriptions Whitman uses to compare Lincoln to a ship’s captain. What kind of leader does the speaker consider Lincoln?

*January 5, 2014*

**Operations Management**

45

*December 13, 2013*

**Astronomy**

On the Autumnal Equinox, you see the Moon in the Waxing Crescent Phase at an angle of 45 degrees above the western horizon. What is the approximate local time? Can someone please explain how to obtain the answer? Thank you!

*December 8, 2013*

**math**

contestado completo

*December 8, 2013*

**Chemistry**

Write a balanced equation for an alpha particle from Gd-148

*December 6, 2013*

**english**

Thank you very much

*December 1, 2013*

**english**

Can someone check my work for me, please. 1.Yesterday he was very busy since he had been fixing the TV from noon. 2. He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered the living room, ...

*December 1, 2013*

**english, grammar**

Use Past Simple and Past Perfect Continuous 1. Yesterday he was very busy since he was fixing the TV from noon. 2. He left for the day before I arrived. He waited for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered the living room, everyone was ...

*December 1, 2013*

**trig.**

a person standing 100ft. from the base of the tree looks up to the top of the tree with an angle of elevation of 52. assuming that the persons eyes are 5ft above ground the ground how tall is the tree?

*November 27, 2013*

**math**

Determine the equation of g(x) that results from translating the function f(x) = x2 + 3 upward 14 units. which is the correct answrr: g(x) = (x + 17)2 g(x) = (x + 14)2 + 3 g(x) = x2 - 11 g(x) = x2 + 17

*November 25, 2013*

**Math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -2x2 + 2x + 6 answers available, which one is correct? {–1.30, 2.30} {-2, 2} {–1.00, –3.00} {–0.33, 0.33}

*November 25, 2013*

**Math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -9x2 + 3x + 5. which one is correct: {0.93, –0.60} {-9, 3} {–0.33, –0.56} {–1.80, 0.60}

*November 25, 2013*

**Math**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x2 + 4x + 3. answers: {–1.00, 1.33} {-3, 4} {–1.33, –1.00} {–0.54, 1.87} Please advise

*November 25, 2013*

**math**

Select the x-coordinate of the vertex of the parabola defined by the function f(x) = -7x2 + 5x + 9. -7/5 9 5/14 -5/7

*November 24, 2013*

**Math**

consider the equations:f(x)=-6x-1 and g(x)=4x^2 Select the solution for (f+g)(x) A) -6x-1+4x^2 B) -24x^3 - 4X^2 C) -24x^2 - 1 D) -6X -1 - 24X^2 I think the answer is A. Please help

*November 24, 2013*

**English**

Jaycee______ himself yesterday when he ran into the goal post. A. Hurt B. Hurted

*November 19, 2013*

**Math**

This is for a second grader. He only works in WHOLE numbers still. I believe this was a mistake on the teachers' part. Should have been "one number is 3 more than the other", I think. Thank you for your help.

*November 14, 2013*

**Math**

My second grader brought home this math problem for which I can find no solution. The sum of two numbers is 21. One number is two more than the other. What are the two numbers?

*November 14, 2013*

**Algebra**

A manufacture sells watches for $31. The manufacture has a fixed cost of $6000 per month and variable cost of $15 per watch. How many watches must be sold to break even? Please show all work!

*November 10, 2013*

**Statistics**

Using a 0.05 level of significance, test the hypothesis that the probability of the NCAA Division I basketball champion being from the Pac 10 is 20%. Repeat the test for the hypothesis that the probability the champion is UCLA is 20%. What do these results say about testing ...

*November 7, 2013*

**Genetics**

Why are we using more dilute cultures for the killing curve while we are using the arg selection culture at full strength? 1. The reason that we are using a more dilute culture for the killing curve is because we want to know how UV light exposure at different time intervals ...

*November 4, 2013*

**Math**

solve: x-squarerootx-2=4 and write 1+4i over 1-i in the form a+bi

*November 3, 2013*

**marketing**

goal help think and analice

*November 3, 2013*

**Spanish**

Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.

*November 3, 2013*

**Spanish**

Raquel y yo queremos alquilar videos. La respuesta seria: Leonardo quiere alguilar videos con nosotros o nosotras? I am confused with nosotros o nosotras. Please help me.

*November 3, 2013*

**GCC**

PREDICT THE REACTION MG(NO3)2(AQ)+NA(S)

*October 29, 2013*

**chemistry**

A typical bathtub can hold 106 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 56 ◦F to 87 ◦F. Assume that the natural gas is pure methane (CH4) and that the products of combustion are ...

*October 26, 2013*

**chemistry**

a 100 W electric heater operates for 10 minutes to hear the gas in a cylinder. At the same time, the gas expands from 1 L to 14 L against a constant atmospheric pressure of 4.246 atm. What is the change in internal energy in Joules of the gas?

*October 25, 2013*

**biology**

All of the above

*October 23, 2013*

**CHEMISTRY**

a solution of sodium hydroxide is standardized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.404 g; buret reading before titration 0.13 mL; buret reading after ...

*October 18, 2013*

**chemistry 101**

We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M

*October 18, 2013*

**chem 101**

We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.590 grams. What is the molarity of the AgNO3 solution? Answer in units of M

*October 18, 2013*

**math**

margaret paid $87 for a skirt and a blouse. the skirt costs twice as much as the blouse. what was the cost of the skirt?

*October 18, 2013*

**math**

mrs. atkins pays $1800 for a new refrigerator, washer, and dryer. the refrigerator costs $250 more than the washer. the dryer costs half as much as the washer. how much does the washer cost?

*October 18, 2013*

**CHEMISTRY**

n unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52 . 5 mL of 6 M HCl. Calculate the concentration of the di- luted NaOH solution. Answer in units of M

*October 18, 2013*

**MATH**

is the answer to this question 13

*October 16, 2013*

**religion/theology**

I was wondering if there was a group or social movement through its work influenced teachings in Catholic Social thought

*October 12, 2013*

**science**

in each duagram a black circle represents a[particle of salt . white circle represents particles of water. which diageram coorecctly showws a solution

*October 1, 2013*

**Physics**

A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...

*October 1, 2013*

**Physics ...... Science**

A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...

*September 30, 2013*

**algebra**

An herbalist has 30 oz of herbs costing $2 per ounce. how many ounces of herbs costing $1 per ounce should be mixed with these 30 ounces of herbs to produce a mixture costing $1.60 per ounce?

*September 27, 2013*

**Early Childhood Literacy**

A family-teacher study meeting should NOT include: A. classes on setting up a home library. B. information about the importance of play. C. a “make it/take it” class on homemade reading materials.D. a teacher-parent conference.

*September 26, 2013*

**Chemistry**

Why is it suggested you use weighing paper or a watch glass instead of filter paper on which to allow a sample to dry? Please give two examples.

*September 18, 2013*

**math, please help!!!!**

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

*September 13, 2013*

**math**

Let t be time in seconds and let r(t) be the rate, in gallons per second, that water enters a reservoir: r(t)=700−40t. a) For 0≤t≤30, when does the reservoir have the most water? b) For 0≤t≤30, when does the reservoir have the least water

*September 13, 2013*

**physics**

A car comes to rest uniform deceleration at the rate of 5.8 m/s2 for 14.3 seconds. What is distance did it travel during this time??

*September 13, 2013*

**Math**

A Classroom bulletin board is 7 feet by 4 feet. If there is a picture of a student every 6 inches along the edge, including one in each corner, how many pictures are on the bulletin board? The teacher gave me the answer 40 but I don't know how.... Can you help me, please

*September 10, 2013*

**Chapter 8 Vocabulary ,8 th grade**

I need help on this I don't know the answer....

*September 8, 2013*

**Algebra**

Please help with this factoring problem: 2x^3/2 − 6x^1/2 + 4x^−1/2 what i did first was make all the exponents whole numbers, so I got: 4x^3-36x+16x^-1 I don't know what to do from there.

*September 6, 2013*

**Marks: 1 A model rocket was launched to an altitu**

Marks: 1 A model rocket was launched to an altitude of 54,925 feet. How many feet above 10 miles did it travel? Choose one answer.

*September 5, 2013*

**calculus book**

sorry i am new to this website. Do any of you know any website that offer free or cheap online book. Calculus Early Transcendentals, 10th Edition NEW! Howard Anton, Irl C. Bivens, Stephen Davis THANK U.

*August 29, 2013*

**Science , physics**

At the beginning of an invertigation , a student determines that the temp. of a beaker of water is 99.8+_ 0.1C . At the end of the investigation , the temp. Is 35.5+_ o.1C . What is the change in temp.?? My answer is 64.5+_ 0.2 C . Is this right ? Thank you!

*August 27, 2013*

**Math**

The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...

*August 22, 2013*

**science............help**

why laws of nature really exist?

*August 22, 2013*

**science**

Can you make it is clear ! Can you give me an example abou it ? Thank a lot!

*August 22, 2013*

**science**

why the author is attempting to express in the passage 'Recognizing that personal and cultural beliefs influence both our perceptions and our interpretations of natural phenomena, we aim through the use of standard procedures and criteria to minimize those influences when ...

*August 22, 2013*

**science**

do you believe that theories can never be proved, only disproved?

*August 21, 2013*

**Science**

Why does tha physicist believe," a measurement without a quoted error is meaningless "? Please help!!

*August 20, 2013*

**Science ,**

can you explain for me ? it is hard to understand.!!

*August 20, 2013*

**Science ,**

Do" laws of nature" really exist ?

*August 20, 2013*

**Physic,**

Why does the author believe ," a measurement without a quoted error is meaningless?

*August 20, 2013*

**maths**

Which post Henry?

*August 6, 2013*

**maths**

Find the angle between the line y=2x and the points (-1;7/3 ) and (0;2)

*August 6, 2013*

**analytical chemistry**

How many grams of H3BO3 and mL of NaOH (with concentration 0,1M) should you add, to get a 500mL buffer, with pH 9. pKa=9,236

*July 30, 2013*

**Psychology**

In their book The Bell Curve, Murray and Herrnstein supported their claim of intelligence differences between races and attributable to.

*July 27, 2013*

**Geometry**

G.58

*July 27, 2013*

**poem**

Energy

*July 17, 2013*

**english**

write sentences with nouns:blessing,miracles,mystery,defect sacrifice

*July 15, 2013*

**english**

1-have you ever searched for information on the internet?Describe the process you used. 2-Is information from the internet as good as information from a library?explain>

*July 15, 2013*

**math**

250 meters 1 second

*July 10, 2013*

**english composition**

i am having trouble coming up with a topic. thanks for the link.

*July 6, 2013*

**english composition**

please help me to create division and classification prewriting essay.

*July 6, 2013*

**math**

Factorial notation problem. Please help? Hi, I am stuck on this maths problem. Solve for n: (n+2)!/(n)! =110. I get as far as (n+2)(n+1) = 110. When I multiply it out I get n^2,3n,2 = 110. There is only one example similar to this in my book and it used a quadratic equation to...

*July 3, 2013*

**physics**

a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)

*June 21, 2013*

**physics**

a skaterboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. how much higher is he when he comes to a stop? (energy problem)

*June 21, 2013*