# Posts by erik

Total # Posts: 110

**Physics, Math, Science**

A 56 kg student is standing atop a spring in an elevator that is accelerating upward at 3.5 m/s^2. The spring constant is 2300 N/m. By how much is the spring compressed? I'm not exactly sure how to approach this problem, much less solve it. The acceleration threw me off, ...

*November 28, 2016*

**Math**

I am confused on this.

*October 20, 2016*

**Math**

Walmart sells a case of 24 cans of diet coke for $6.88. Publix sells a 12 pack of diet coke for $3.99. Which is the best buy? I need help on this.

*October 20, 2016*

**Math**

You mix 8 tablespoons of hot sauce and 3 cups of salsa in a green bowl. You mix 12 tablespoons of hot sauce and 4 cups of salsa in an orange bowl. Which mixture is hotter? My Answers: My first train of thought is that there must be a conversion factor to this however I am not ...

*October 20, 2016*

**Math**

There is a football field and the length shows 120 yd and the width is 53 1/3 yd a. What are the dimensions of a football field in feet? b. A chalk line is placed around the perimeter of the football field. What is the length of this line in feet? c. About how many laps around...

*October 18, 2016*

**Math**

Thank you Ms. Sue.

*October 17, 2016*

**Math**

Which container holds more, a half-gallon milk jug or a 2 liter juice bottle? My answer: 1 gallon=3.79 liters 3.79 liters/2=1.895 liters A 2 liter juice bottle would hold more. Can you please check my work and let me know if there is another way to figure this answer out. ...

*October 17, 2016*

**History**

What was family life like in Indian society? Please help.

*October 17, 2016*

**History**

The Aryans were made up of different groups of people. However, in what way were they alike? I am having a lot of trouble answering this question Please help.

*October 17, 2016*

**Language Arts**

Is there anything I can do practice tests on

*October 11, 2016*

**Language Arts**

I need to practice writing summaries and small essay for my 9 week exam and I am not very good at writing summaries or essays. Can you please help me or provide me with a website that I am able to do practice summaries on. Please help.

*October 11, 2016*

**Math**

Demetria is tiling a square area of her bathroom floor. For every 13 white tiles used, she wants to use 12 gray tiles. Draw a grid , 5 squares by 5 squares, then shade the tiles to show a pattern that would match the ratio of white tiles to gray tiles that Demetria would like ...

*October 11, 2016*

**Math**

THANK YOU MISS SUE I HOPE WE CAN UNITE AGAIN LOL

*October 11, 2016*

**Math**

How many factors do the number 8 and 9 have in common? I got, 8:1,2,4,8 9:1,3,9 My answer: 1 Can you please check my answer to see if I got it correct?

*October 11, 2016*

**Math**

The quotient of two numbers is 46. The difference of the two numbers is 45. What are the two numbers.

*August 17, 2016*

**social studies**

How did Congress respond to the black codes passed in many Southern states after the Civil War? (1 point)by taking away the voting rights of southerners by sanctioning the remaining Democrats in Congress by impeaching the president by expanding the power of the Freedmen's...

*June 4, 2016*

**General Chemistry**

Carbonic acid forms when carbon dioxide dissolves in water. A typical can of soda contains a 0.120 M solution of CO2. Assuming that all dissolved CO2 is present as carbonic acid, and that no other substances dissolved in solution affect the pH, what is the pH of this solution...

*March 11, 2016*

**English**

Ms. Sue, I thought that you had a limit of 2 tries and you were done you only gave Kaai97 1 try, what happened? Erik

*January 19, 2016*

**university of phoenix**

In a binomial distribution, n = 12 and π = .60. find the probability x=5

*December 9, 2015*

**Calculus**

Find the derivative of f(x)=(2x)^(1/2)ln(15x)

*December 7, 2015*

**Calculus**

Find the derivative of f(x)=(2x)^(1/2)ln(15x)

*December 7, 2015*

**Calculus**

Find the derivative of y=(2*x^(3/2))/(x^2+5)

*December 7, 2015*

**Calculus**

A baseball diamond is a square 90 ft on a side. A player runs from first base to second base at 15 ft/sec. At what rate is the player's distance from home base increasing when he is half way from first to second base?

*December 7, 2015*

**Calculus**

Given dy/dt=4y and y(2)=400. Find y(7).

*December 4, 2015*

**Math**

It's A

*November 8, 2015*

**Calculus**

A rectangular recreational field needs to be built outside of a gymnasium. Three walls of fencing are needed and the fourth wall is to be a wall of the gymnasium itself. The ideal area for such a field is exactly 250000ft2. In order to minimize costs, it is necessary to ...

*November 4, 2015*

**Physics**

The steel I-beam in the drawing has a weight of 5.22 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends?

*October 30, 2015*

**algebra 1**

Yeah, it's C

*October 30, 2015*

**organic chemistry**

For all four of these, it is only the prefix for the longest chain and number of substituents that matters in determining the number of carbons. In #1, butene has the prefix "but-", so therefore has four carbons in the longest chain. Dimethylethylene also has four ...

*July 11, 2015*

**is10**

write a story

*January 7, 2015*

**Physics**

A ball starts 1.175 meters off the ground and shot at an angle of 40 degrees with a velocity of 3.2 m/s. Where does it land?

*November 11, 2014*

**Math**

You complete 3centimeters of a necklace in an hour. Each hour after the first, you triple the length of the necklace. Write an expression using exponents for the length of the necklace after three hours. Then find the length.

*September 19, 2014*

**ecenomics**

how would you describe the impact of factory goods

*September 3, 2014*

**Math**

Find and express the results in polar form for the following: z = 2(e^(-jω) - e^(j7ω)), where ω = omega j is the math equivalent of i = sqrt(-1)

*August 29, 2014*

**grammar**

Thank you for answering my question. What made me confused is that in my study guide, "land of liberty" is listed as a compound noun. I am still confused why "land of liberty" is a compound noun but "game of football" is not. Thank you for your help!

*June 30, 2014*

**grammar**

In the sentence - "Tom could see the anger in Mr. Adams' face." is "Mr. Adams' face" a compound noun? I know Mr. Adams' is a possessive noun and face is a common noun but I am supposed to list compound nouns. Same with the sentence "The ...

*June 30, 2014*

**Calculus Help and Check**

58,000

*April 29, 2014*

**math**

a piece of silver density 10.5g displaces 4.5ml {cubed} of water in a test tube what is its mass?

*February 4, 2014*

**English**

no it is not

*February 4, 2014*

**Math**

No bra use it's the same time so he didn miss the bus stop

*April 22, 2013*

**math**

Jill bought a can of pop for .75 and jane bought a 6 pack.for 3.60 who got the best buy and why is it the best buy

*March 31, 2013*

**science**

10 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.1 M C2H3O2-. What is the pH of the resulting solution?

*March 15, 2013*

**science**

What is the gravitational potential energy of a 2kg ball on planet earth raised 15 meters in the air?

*January 22, 2013*

**Math**

On a Christmas package, Audrey needs to use only 40-cent stamps and 16-cent stamps. If she uses twice as many 40-cent stamps as 16-cent stamps, how many of each type of stamp must she use to mail a package costing $5.76 in postage?

*January 18, 2013*

**statistics**

Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16 of M. californianus. ...

*November 14, 2012*

**statistics**

Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16 of M. californianus. ...

*November 14, 2012*

**Statistics**

Lead (Pb) concentrations were measured in waterfowl eggshell samples from two locations. In n1 = 41 samples from a location downstream from a paper mill, the mean Pb concentration was 1 x = 0.13 ppm with a standard deviation of s1 = 0.04 ppm. In n2 = 31 samples from a location...

*November 7, 2012*

**Statistics**

Lead (Pb) concentrations were measured in waterfowl eggshell samples from two locations. In n1 = 41 samples from a location downstream from a paper mill, the mean Pb concentration was 1 x = 0.13 ppm with a standard deviation of s1 = 0.04 ppm. In n2 = 31 samples from a location...

*November 7, 2012*

**Science**

5.00 ml of 1.90M HCl is diluted to 0.400l. calculate the pH of the HCl?

*September 25, 2012*

**nervous system**

The pulmonary circuit and the ________ circuit make up the blood vessels of the body. A. Flexible B. Systemic C. Blood D. Capillary c?

*August 26, 2012*

**body systems**

i know its A i googled it

*August 26, 2012*

**body systems**

D?

*August 26, 2012*

**body systems**

Veins carry blood ________ the heart. A. Away from B. Towards C. Closer to D. All of the above c?

*August 26, 2012*

**health**

ummm A?

*August 26, 2012*

**health**

me too hahaha

*August 11, 2012*

**asdf**

18.87

*July 22, 2012*

**statistics**

Suppose that a given population of trees have an average height of 10.2 ft and a standard deviation of 1.3 ft. Find the proportion of the population with heights above 11.8 ft.

*May 3, 2012*

**Math**

In the number 22! determine the largest prime factor.

*January 30, 2012*

**chem**

Ok so i looked at it and tried to figure out the conj. base and acid. Are these right? 1) S2-(aq) + HCl(aq) <=>Cl1-(aq) + HS1-(aq) This is what I think it is: Acid = HCl Base = S^2- Conjugate acid =HS^1- Conjugate base = Cl^1- 2) H2O2(aq) + PO43-(aq) <=>HPO42-(aq...

*January 29, 2012*

**chem**

Ok so for question I have to state whether the element/compound is an acid, base, conjugate acid or conjugate base. Can u please tell me if i am correct and help me out with the ones i am unsure what the answer is? 1)S^2-(aq)+HCl(aq)<=>Cl^1-(aq)+HS^1-(aq) This is what I ...

*January 29, 2012*

**Math**

A sequence of four integers is both arithmetic and geometric. if the sum of the four numbers is 20, find the first integer in the sequence.

*January 29, 2012*

**algebra**

if four individuals share $270 in the ratio of 1:1:2:5, how much is the lagest share?

*January 24, 2012*

**Physics: Three Identical Masses**

Three identical masses of 640 each are placed on the x axis. One mass is at = -100 , one is at the origin, and one is at = 400 . What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the gravitational constant to be = ...

*October 3, 2011*

**Physics**

A car goes around a curve on a road that is banked at an angle of 32.5 . Even though the road is slick, the car will stay on the road without any friction between its tires and the road when its speed is 19.0 . What is the radius of the curve?

*October 3, 2011*

**Trigonometry**

Nevermind, figured it out myself....

*July 2, 2011*

**Trigonometry**

Verify Identity: cos5x-cos3x=-8sin^2x(2cos^3x-cosx)

*July 2, 2011*

**English**

Maya Angelou - I Know Why the Caged Bird Sings What Maya Angelou means by the title of her autobiography.? Please Help if you can

*June 17, 2011*

**Statistics**

Suppose that heights of newborns are bell shaped with a mean of 6.8 pounds and a standard deviation of 1.3 pounds. What percentage of weights are: a) Below 6.8 lbs.? b) Above 8.3 lbs.?

*May 6, 2011*

**Chemistry**

Mg + 2HCl --> MgCl2 + H2 #mol=molarity x volume (3.00) x (.0132 L) = .0396 mol HCl half this in accordance with you balanced chemical equation to get #mol H2 = .0198. relate #mol of gas to volume --> (.0198) x (22.4) = 0.444...closest answer, (D.

*May 5, 2011*

**Statistics**

Suppose that heights of newborns are bell shaped with a mean of 6.8 pounds and a standard deviation of 1.3 pounds. What percentage of weights are: a) Below 6.8 lbs.? b) Above 8.3 lbs.?

*May 4, 2011*

**Statistics**

Suppose the mean height of a population is 65 inches with a standard deviation of 1.5 inches. What is the z value for a height (x) of 67 inches?

*May 4, 2011*

**Chemistry**

Im stuck on this question. The unusual aspect of functional group replacement of an alcohols hydroxyl group by chlorine by treatment with thionyl chloride is: A)spontaneous creation of a carboccation and SO2 Cl,the ion pair created by SOCl's mechanism of action. B)That ...

*April 28, 2011*

**Math**

I cant figure this question out. I could use some help. Solve for x lnx-lnx^2+ln5 = 0 Simplify the answer

*April 27, 2011*

**physics**

what is the torque a bolt with 30 cm wrench with an applied force of 650n?

*April 15, 2011*

**chemistry**

Why was the 400.5 multiplied by 100, then divided by the 694.8???

*April 8, 2011*

**trig**

1/4tan(2x)

*March 15, 2011*

**7th social studies**

from Kuwait go east to

*January 5, 2011*

**Chem**

what is the empirical formula of aspirin, C9H8O4? is it the same again ?

*January 2, 2011*

**phi 103**

is not the most important factor they consider when comparing two films---- not sure about this, but it seems to be the best answer

*December 18, 2010*

**physics**

A 4.0 kg pulley of radius 0.15 m is pivoted about an axis through its center. What constant torque is required for the pulley to reach an angular speed of 25 rad/s after rotating 6.0 revolutions, starting from rest? What moment of inertia do I use to figure our the torque?

*December 12, 2010*

**physics**

A 4.0 kg pulley of radius 0.15 m is pivoted about an axis through its center. What constant torque is required for the pulley to reach an angular speed of 25 rad/s after rotating 6.0 revolutions, starting from rest?

*December 11, 2010*

**12th grade**

The kinetic energy of a 50 newton object resting on the edge of a cliff 30 meters high is?

*November 18, 2010*

**English**

I'm not really sure what you mean-I just didn't understand this-I'm not pretending to be anyone else- I just needed help with this

*September 8, 2010*

**English**

Please help me interpret this-I'm in 8th grade and I don't have any idea: What is the main idea? Read the following quote from Thomas Paine's pamphlet, Common Sense. Summarize the main idea of the passage. "Some writers have so confounded society with ...

*September 8, 2010*

**College math**

A circular water stain on your home ceiling had a diameter of about 4 inches across on Monday at 8 A.M. On Tuesday at the same time it was about 5.3 inches across. The unit for time is days. (1) Calculate the growth rate as a percentage to at least the nearest 10-thousandth ...

*September 7, 2010*

**mathematics**

A circular water stain on your home ceiling had a diameter of about 4 inches across on Monday at 8 A.M. On Tuesday at the same time it was about 5.3 inches across. The unit for time is days. (1) Calculate the growth rate as a percentage to at least the nearest 10-thousandth ...

*September 7, 2010*

**verbs**

thanks again

*August 17, 2010*

**verbs**

In heaven there are many mansions. "are" is the verb right

*August 17, 2010*

**verbs**

thank you!

*August 17, 2010*

**verbs**

thanks you!

*August 17, 2010*

**verbs**

A signed warned drivers about falling rocks along the street. in this sentence would the only verb be warned because falling is an adj describing rocks

*August 17, 2010*

**High School Science**

A ray of light goes from water (nwater=1.333) into ice (nice=1.309). Which of the following statements is true? 1) The ray gets closer to the normal after crossing the interface. 2) The ray does not change directions after crossing the interface. 3)The ray gets farther away ...

*March 20, 2010*

**8th grade science**

What is radiation?

*March 18, 2010*

**biology**

Why might it be worse to get an infection from someone in the hospital than from someone on a bus? is it because how bad the infection is, usually people that are in the hospital are in bad condition

*February 24, 2010*

**4th grade math**

Thank you Ms. Sue!

*February 17, 2010*

**4th grade math**

Judy and Ramey together have 42 stuffed animals. Judy has 12 fewer animals than Ramey. How many stuffed animals does each girl have? I know that the answer is Ramey has 27 and Judy has 12 but I don't know how to write the equation for solving it. I figured out the answer ...

*February 17, 2010*

**Washroom Fix Urgent**

what causes water to leak after you've replaced the wax ring on the toilet?

*September 23, 2009*

**Learning**

can anyone give me a site from which I can learn educational things, it can be game types of sites, I don't mind that as long as it isn't boring

*July 20, 2009*

**Jokes**

I am in need for a funny joke which I need to add in my skit. Please give me your ideas, and with them I will try to make mine, thanks:-)

*July 20, 2009*

**Games**

yes that was actually my sister who needed to know if webkinz is safe, as she is younger than me, and yeah we do have an antivirus progam

*July 20, 2009*