# Posts by Laurie

Total # Posts: 180

**chemisty**

if you react 1.20g of copper metal with excess silver nitrate, how many moles of silver metal are produced?

*November 20, 2016*

**Gaussian Elimination Method**

z-d-b=200 z +2b=250 b=150

*October 30, 2016*

**Math**

Find two numbers whose product is 20 and whose quotient is 5

*September 20, 2016*

**Algebra**

The monthly income I, in dollars, from a new product is given by I(t) = 75000 − 55000e^−0.003t where t is the time, in months, since the product was first put on the market. (Round your answers to the nearest dollar amount.) (a) What was the monthly income after ...

*May 15, 2016*

**Math**

If a 2-inch pipe will fill a tank in 6 hours, how long will it require for a 3-inch pipe to fill it?

*May 6, 2016*

**Math**

Donations to an annual fundraiser are 15% greater this year than last year. Last year, donations were 10% greater than the year before. The amount raised this year was $10,120. How much was raised 2 years ago?

*April 16, 2016*

**Math**

40 students are in the science club. 45% are girls. New girls enter the club and now the percentage of girls is 56%. How many new girls join the club?

*April 15, 2016*

**Science**

Thanks

*February 10, 2016*

**Science**

A basketball momentarily changes shape as it bounces off the floor. This is due to balanced forces acting on the ball. True False False?

*February 10, 2016*

**Technology**

Thanks :)

*February 9, 2016*

**Technology**

1. Which of the following is NOT an example of a objective question? A. multiple choice B. essay** C. true/false D. matching 2. Why is it important to recognize the key word in an essay question? A. It will provide the answer in an essay B. It will show you a friend’s ...

*February 9, 2016*

**Algebra 2**

I have gotten two different answers to the following problem. Can someone please let me know which answer is correct? (5 - 6)³ + 14 ÷ (2 + 5) = -1 + 14/7 = -1 + 2 = 1 or 1 + 14/7 = 1 + 2 = 3 I think it is 1. Thank you.

*August 10, 2015*

**algbra 2**

Can you let me know if the answer to the following problem is 11 2/3? Thank you 4² + [15 ÷ 9 - 3(2)] = 11 2/3??

*August 10, 2015*

**Thank You To All of You Who Help**

Thank you to all the people that answers questions on this website. It is truly helpful to people like me. I don't know how to respond to those of you that help me, but Thank You!

*August 1, 2015*

**High school Algebra**

For the following example: 5 * 6 - 2 * 4 = 30 - 8 Does this represent the substitution property? I am assuming yes since you are substituting 5*6 for 30 on the other side of the equation. Thank you to those who answer. I was not sure how to send a thank you reply.

*August 1, 2015*

**Algebra II**

Can you please help me solve the following problem: 4² + [15 + 9 - 3(2)] Thank you.

*May 29, 2015*

**algebra**

Not sure. How

*February 5, 2015*

**algebra**

The length of a rectangular piece of steel in a bridge is 4 meters less than triple the width. The perimeter of the piece of steel in a bridge is 4 meters less than triple the width. The perimeter of the piece of steel is 48 meters. Find the length of the piece of steel = find...

*February 5, 2015*

**Microeconomics**

10. Bob must ship his belongings worth 1,000 to England from Latin America. The prob- ability that a ship sinks and he loses the entire value of his shipment is 0.1. Assume that if one ship sinks it does not affect the probability that the second ship sinks. He has the option ...

*October 20, 2014*

**Math**

A car rental company charges $100 for the first 50 miles and $10 for every additional 10 miles. If Gregg traveled 150 miles, how much would he pay?

*October 1, 2014*

**math**

A car rental company charges $100 for the first 50 miles and $10 for every additional 10 miles. If Gregg traveled 150 miles, how much would he pay? I know the answer intuitively is $200, but how do I set up this equation

*October 1, 2014*

**English**

My father was a hard working man but didn't earn much money. Is this sentence correctly punctuated?

*September 6, 2014*

**Calculus**

Find the area of the region enclosed by the parabolas y=x^2 and y+2x-x^2

*May 21, 2014*

**Calculus**

2x -------- (x-2)(x+2) using partial fractions That's supposed to be a division sign of some sort

*May 21, 2014*

**Calculus**

xe^x using integration by parts

*May 21, 2014*

**Physics**

1. A car decelerates at -3.8 without skidding when coming to rest on a level road. What would be its deceleration if the road is inclined at 9.3° and the car moves uphill? (Asume the same static friction coefficient and the car is on the verge of skidding)

*March 25, 2014*

**please check(Social studies)**

Karen is 100% correct!

*March 14, 2014*

**Science -Check Answers-**

Yep, Mariana was correct I got all my answers correct. Thanks

*March 3, 2014*

**math**

How many edges are in K15, the complete graph with 15 vertices

*December 9, 2013*

**Math**

Mr. Thomas spent 1600.00 of his savings on a TV and 2/5 of the remainder on a refrigerator. He had 1/3 of his original amount of savings left. What was Mr. Thomas's original savings?

*November 11, 2013*

**Biology**

What could be a benefit for a plant that can switch between cyclic and non-cyclic electron transport? Think about the products of electron transport and what products are needed for the Calvin Cycle.

*November 1, 2013*

**Chemistry**

Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 6 to n = 1.

*October 10, 2013*

**Algebra**

Multiply: -8(2a+4b-6)

*September 30, 2013*

**math**

is the formula "y=x to the 7th power" an example of a proportional relationship?

*April 30, 2013*

**t-test**

For a single-sample t-test the t(17) = 2.90, p<.02, how many were in the study?

*March 30, 2013*

**statistics**

Want to find if students who are musicians have higher Iq test scores than the general population. the researcher predicts that playing music is associated with higher IQ scores. the researcher selects a sample of 75 musicians from area and gives them an IQ test. The mean for ...

*March 30, 2013*

**Probability**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

*February 27, 2013*

**Probabilities Help**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

*February 27, 2013*

**Probabilities Help**

The probability that an individual egg in a carton of eggs is cracked is 0.05. You have picked out a carton of 1 dozen eggs (that’s 12 eggs) at the grocery store. Determine the probability that at most two of the eggs in the carton are cracked

*February 27, 2013*

**algebra**

Determine the comparable interest rate for a $50,000 loan when the quoted information is 11.4% + 0.5 pt + $300.

*November 24, 2012*

**economics**

The relationship between consumer expectations and economic performance: Worsening expectations of changes in income might lead to a reduction in confidence and a fall in spending at each level of income. Conversely an improvement in consumer expectations about the health of ...

*October 31, 2012*

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D?

*October 24, 2012*

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D?

*October 23, 2012*

**Physics**

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the ...

*October 23, 2012*

**Physics**

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D? No one has answered this question yet.

*October 22, 2012*

**physics**

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the ...

*October 22, 2012*

**math**

Find (gof)(-2) f(x)=Squareroot of 4-x; g(x)=1-3x^2

*October 9, 2012*

**math**

What is the domain of the function f(x)=11/Squareroot of 4-x^2 a.(-11,11) b.[-11,11] c. (-2,2) d. [-2,2] What is the range of the function? y=8/Squareroot of 4-x^2 a. [4, infinity) b. (-infinity, 4] c. [8, infinity) d. (-infinity, 12] e. [6, infinity) f. (-infinity, 6]

*October 9, 2012*

**Math/Algebra**

y^2+6+2(y^2+5) My answer is 3y^2+16 (simplifying) but the hawkes learning system won't accept this answer. Am I missing something?

*September 4, 2012*

**Calculus Voulme**

find the volume of the solid generated by revolving the region r bounded by the graphs of the given equations about the y-axis. x^2+y^2=1 x=1 y=1

*July 19, 2012*

**calculus derivatives**

Please confirm: {(5x+2)^4/x^2-3x+1)^3}= 20(5x+2)^2(x^2-3x+1)^3 -3x^2(5x+2)^4 (x^2-3x+1)^2/(x^2-3x+1)^6

*July 19, 2012*

**algebra**

Joey is flying a kite that is attached to a string 200 yards long. The kite is as high as it can go and is flying directly above Joey's house which is 50 yards in front of Joey. How high above the ground is the kite?

*June 27, 2012*

**Physics**

Six light bulbs are connected in parallel to a 9.0 V battery. Each bulb has a resistance of 3.0 ohms. What is the current in each bulb?

*May 15, 2012*

**math**

how to factor w^2r^2-1

*April 3, 2012*

**Chemistry**

A 1 kg block of ice, at 0.0 celcius is added to a picnic cooler. How much heat will the ice remove as it melts into water at 0.0celcius?

*March 22, 2012*

**Chemistry**

What volume of 3.0M sodium hydroxide will be needed to neutralize 2.0 L of 1.0M hydrochloric acid?

*March 21, 2012*

**Literacy**

11. In the article, "How Lethal Was the K-T Impact?" by Richard A.Kerr and Virginia Morell, what is listed as part of the related subject matter? The answer is: D. Asteroids

*March 10, 2012*

**Math**

Use a radius of 50 and 3 for pi to estimate the area. Then use a radius of 40 and 3 for pi to estimate the area. Is your answer reasonable? Why?

*March 7, 2012*

**Literacy**

A strong search strategy for a search engine would include which of the following? The Answer is: D. Using quotation marks, hyphens, and unique words

*January 17, 2012*

**Literacy**

19. Which of the following keyword searches should retrieve the most results in an online database? A. Beta B. Beta OR blockers C. Beta NOT blockers D. Beta AND blockers Answer: B

*January 16, 2012*

**physics**

Lasers are used to try to produce controlled fusion reactions. These lasers require brief pulses of energy that are stored in large rooms filled with capacitors. One such room has a capacitance of 64 10-3 F charged to a potential difference of 7 kV. (a) Given that W = 1/2C&#...

*January 12, 2012*

**ETHNIC DIVERSITY**

This is honestly the first of its kind in regards to this situation I have came across in my year of attendance. I have had similar classes, but the assignments have all been relevant to today's world and research has been "easy" in comparison. At least in my ...

*November 16, 2011*

**ETHNIC DIVERSITY**

I appreciate what you are saying. I did contact my instructor asking for any insight into what might be considered either "credible" information regarding this or even a push in the right direction to finding information on policy. The only response I received was to...

*November 16, 2011*

**ETHNIC DIVERSITY**

I agree completely. Honestly I have researched this for 2 days and can find nothing regarding recent (within the past 2 years) regarding this. It has to be noted this comes from a text book that was published in 2006, and from what I am finding this question has been around ...

*November 16, 2011*

**ETHNIC DIVERSITY**

I am trying to locate credible information in regards to the following question. Please note, I do not want the answers, just possible locations that might provide me with a place to start looking as I can not find anything recent. According to research and news reports within...

*November 16, 2011*

**math**

-34

*October 31, 2011*

**math**

An arcade uses 3 different colored tokens for their game machines. For $20 you can purchase any of the following mixtures of tokens: 14 gold, 20 silver, and 24 bronze; OR, 20 gold, 15 silver, and 19 bronze; OR, 30 gold, 5 silver, and 13 bronze. What is the monetary value of ...

*October 28, 2011*

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

*October 8, 2011*

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

*October 8, 2011*

**Chemistry**

Element X has three istotopes, X⁹⁵, X⁹⁶, and X⁹⁸. Element X has an atomic mass of 96.344u. If X-98 has a mass of 98.0001u and an abundance of 19.8%, what are the abundances of X-96 (mass of 95.9988u) and X-95 (mass of 95.0011u)?

*October 8, 2011*

**Chemistry**

Nitrogen effused through a pinhole 1.7times as fast as another gaseous element at the same conditions.Estimate the other element's molar mass. Answer in units of g/mol

*October 2, 2011*

**Chemistry**

.2757g

*October 2, 2011*

**Chemistry**

A 23 L flask at 254 K and 19 Torr contains nitrogen. What mass of nitrogen is present? Answer in units of g.

*October 2, 2011*

**calculus**

Find equations for the lines that are tangent and normal to the graph of y = sinx + 3 at x = pi

*September 22, 2011*

**math**

Find the volume of a cone with a height of 7.1 m and a circular base whose radius is 3.2 m. Use 3.14 for pi.

*August 8, 2011*

**Social STUDIES**

in kennedys inaugural address what was the first revolution president kennedy spoke of was it the american revolution,the emancipation proclamation,the war of 1812

*July 7, 2011*

**grammar**

e. the sentence is fine as it is.

*June 15, 2011*

**English**

Can you tell me if I have this correct? I have to identify the adjectives and adverbs in this paragraph. Adjectives: early first huge high several Adverbs: monthly severely monthly ridiculously eventually immediately monthly Like so many people, early in life I was not very ...

*May 16, 2011*

**algebra**

F(4)=8 what is the ordered pair

*March 31, 2011*

**literature**

In the book code orange: How do they cure the small pox?

*March 8, 2011*

**Chemistry**

you have to find the Ksp in the back of your chemistry book.

*February 8, 2011*

**need help**

I have this equation y+x=-7 I have to graph my answers to find out what my y is. I have tried everything, and I cannot get my points to cross. Any help would be great.

*December 9, 2010*

**health HCA/210**

Thank you for the help. I think there is enough information to get me started. This is my first time using this site and I found it very interesting!

*December 2, 2010*

**health HCA/210**

I have a 10 to 12 powerpoint slide due next week and I just wanted to get started on it. I need to explain where health insurance began, the purpose of health insurance, and I have to list the advantages and disadvantages to HMOs, Managed care, PPOs, POS, and Tricare. Any help...

*December 2, 2010*

**biology**

If a brown-eyed man marries a blue-eyed woman and they have ten children, all brown-eyed, can you be certain that the man is homozygous? If the eleventh child has blue eyes, what will that show you about the father’s genotype?

*November 15, 2010*

**Marketing**

Describe how companies have used marketing data to target wants and need.

*September 26, 2010*

**agriculture**

can you unscramble this. It has to do with farming. dgpcrtouins

*July 24, 2010*

**Gender**

How does the English language that is spoken in the US accomplish that men are portrayed as independent and serious, and are defined and described by activities and accomplishments?

*June 25, 2010*

**english**

select the sentence in which the verb correctly agrees with the subject.

*June 19, 2010*

**physics**

An 9.0 m, 210 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 890 N person climb before the ladder begins to slip?

*June 10, 2010*

**Communication and Listening Studies**

Thanks for the reply! :) This is what I'm trying to figure out. There are no choices, we just have to determine how our listening would be impacted while communicating with someone 20 years older. I am 22. How old are you? What would impact our listening if we were to ...

*June 7, 2010*

**Communication and Listening Studies**

When a speaker is 20 years older that the person listening, the listener's ability to listen is affected by what factors?

*June 7, 2010*

**american government**

Consider the phrases “A belief in equal rights has often led to the belief in equality of opportunity;” and “American society does not emphasize equal results or equal rewards;” on p. 141 of the text. Explain these conceptions of equality in 200 to 300 ...

*April 30, 2010*

**Data Management gr. 12**

I am so confused about correlation equations. I don't know at all how to use them r= W (x-xXy-y)=Sxy __________________ n *the equation doesnt look exactly like this but it is similar, if i can get any help at all that would be great example question:

*April 24, 2010*

**math**

trying to unscrable the letters jeatdcn into a math word

*April 13, 2010*

**Geometry-PLEASE CHECK ANSWERS!**

In isosceles triangle DEF, DE=DF. Which of the following is true? 1) <D is congruent to <E 2) <F is congruent to <E 3) <D is congruent to <F 4) <D is congruent to <E which is congruent to <F Is the answer (3)? In triangle ABC, if line AB is congruent...

*February 23, 2010*

**math**

1. 3y=13divided by 2=>y= 2. 6divided by 15=12divided by y =>y= 3. 8 divided by 5 y - 4 = 20 =>y = 4. 3:8= y:32 =>y=

*February 18, 2010*

**Calculus**

square root of (1-u squared)

*December 5, 2009*

**pre calc**

13-5e^2x=3

*October 30, 2009*

**Algebra Help**

2x^2 + 4x – 1 = 0

*August 3, 2009*