# Posts by Elizabeth

Total # Posts: 1,046

**math**

No it stays -8

*March 27, 2017*

**Pre calc**

A water tower is located x = 375 ft from a building (see the figure). From a window in the building, an observer notes that the angle of elevation to the top of the tower is 39° and that the angle of depression to the bottom of the tower is 25°. How tall is the tower...

*March 27, 2017*

**Writing**

Please Help me !! Sentence 9: They emphasized the importance of good maternal and child health care, including the administering of vaccines? 1- replace They with it 2- change emphasized to emphasize 3- change the spelling of importance to importants 4- insert a comma after ...

*March 21, 2017*

**Writing**

I Think 3

*March 21, 2017*

**Writing **

Sentence 6: Just choosing among handsaws circular saws jigsaws and saver saws can be bewildering. 1- handsaws circular saws jigsaws and saver saws 2- handsaws circular saws jigsaws, and saber saws. 3- handsaws, circular saws, jigsaws, and saber saws. 4- handsaws, circular saws...

*March 21, 2017*

**Science**

A car is traveling at 8.9 m/s (20mph) in a school zone. A child darts in front of the car. Ignoring reaction time, the car can accelerate (brake) at -4.57 m/s. -How long will it take for the car to stop? -How far will the car travel in that time?

*February 27, 2017*

**Chemistry**

Consider a 1.0 L container of Neon gas at STP. Will the average kinetic energy, average velocity,and frequency of the collisions of gas molecules with the walls of the container increase, decrease, or remain the same under each of the following conditions? a. The temperature ...

*February 24, 2017*

**Algebra I**

3 bags of chips and 5 bottles of water cost $31. A chip costs one dollar less than 3 bottles of water. Find the cost of each.

*February 19, 2017*

**Physical sciences**

Science

*February 17, 2017*

**Calculus **

Differentiate each 1. Y= 1/x + 3/x^2 + 2/x^3 2. Y= x^5(1+ x)^5 3. Y= 4-x^2 / 2x+3 Can someone help me I'm lost

*February 13, 2017*

**Calculus **

A point moves along the curve y= x^3 -3x + 5 so that x= 1/2 square root t + 3 where t is the time. At what rate is y changing when t = 4? Need some help!!!

*February 12, 2017*

**Math-Ratios**

In a college library, there are 4 times as many nonfiction books as fiction books. A.Find the ratio of the number of nonfiction books to the number of fiction books. B.How many times the number of nonfiction books is the number of fiction books? C.Suppose the fiction books is ...

*January 19, 2017*

**Math**

Victoria has a 2-pound package of flour. She uses 2/5 of the flour to make bread. Find the weight of the package of flour that she has left. Express your answer as a decimal.

*December 21, 2016*

**Math**

Why is 25 a composite number help!!

*December 3, 2016*

**Math help please**

solve the equation. then you say what does x mean the answer is Solution 1 Subtract 77 from both sides 5x=10-75x=10?7 2 Simplify 10-710?7 to 33 5x=35x=3 3 Divide both sides by 55 x=\frac{3}{5}x= ?5 ? ?3 ?? Done Decimal Form: 0.6

*November 18, 2016*

**math**

Shopping: Tax Situation: You are purchasing four items and want to calculate the tax. The items cost $2.50, $8.75, $3.00, and $10.25. The tax rate is 6%. How much is the tax? Calculation With Distribution (Show all steps.) Calculation Without Distribution (Show all steps.) I ...

*November 18, 2016*

**Math shopping discounts**

is it easeir to use distributive property or nah?

*November 18, 2016*

**Math shopping discounts**

Situation: You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation With Distribution

*November 18, 2016*

**math**

thx for the help damon, and yea I meant at most 35 people. What grade are you in?

*November 18, 2016*

**math**

Solve each inequality 1. m-7<6= 2. n-8>5= 3. p+5<10= 4. there are 20 students and unknown number of adults, the bus can hold at least 35 people. What is the greatest number of adults who can chaperon?

*November 18, 2016*

**history**

Articles of Confederation, 1777–1781. The Articles of Confederation served as the written document that established the functions of the national government of the United States after it declared independence from Great Britain.

*November 18, 2016*

**Literacy**

it would be number one moses is from the bible and tubman is represnted as moses so number one would be the correct answer.

*November 18, 2016*

**geography**

Jews were originally expelled from their homeland by the: A. Palestinians B. Romans C. French D. British I think that it's B, but I'm not sure. Thanks!

*November 2, 2016*

**Social Studies**

Which of the following is most closely associated with the idea of nullification? A.States' rights B.Tariffs** C.Foreign policy D.Suffrage

*November 1, 2016*

**Algebra**

A team won 6 out 8 games played this season? What percent of games did they win? 6 divided by 8= 0.75, but 75% is the wrong answer. What is the correct answer?

*October 28, 2016*

**Algebra**

A team won 6 out 8 games played this season? What percent of games did they win? 6 divided by 8= 0.75, but 75% is the wrong answer. What is the correct answer?

*October 27, 2016*

**geog**

What kind of physical processes that formed the Alps? Thanks!

*October 11, 2016*

**Science**

A gene is to a chromosome as _______. a) a pea is to as a pod b) a front is to a back c) a bike is to a car d) a building is to a window I think it is a.

*October 5, 2016*

**Chemistry**

Good Morning DrBob222, My answer is all of 1,2,and 3. Please let me know if I am on the right track. 2) 2na=2na+2e (oxidation) Cl2+2e-=2Cl- (reduction) 3) 2Mg=Mg2+ +4e (oxidation) O2+4e-=2O2 (oxidation)

*October 2, 2016*

**Physics**

Damon awesome explanation. Thank you! :)

*October 2, 2016*

**Physics**

When an object is moving in a circle, but it is not held to the center by a tangible connection like a string, what provides the centripetal force? 1) some force such as friction or gravity. 2) the tendency for the object to move in a straight line. 3) centrifugal force. 4) ...

*October 2, 2016*

**physics**

When an object is moving in a circle, but it is not held to the center by a tangible connection like a string, what provides the centripetal force? 1) some force such as friction or gravity. 2) the tendency for the object to move in a straight line. 3) centrifugal force. 4) ...

*October 1, 2016*

**american Government**

Yes, the answer is b. Ms Sue isnt wrong, it does not even seem you thought about the question before choosing an answer, although it could have been brought up more considerably. Please put more thought into your choices, answers should not be given.

*September 25, 2016*

**chemistry**

A solution contains naphthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 11.07 % naphthalene by mass. Calculate the vapor pressure at 25 ∘C of hexane above the solution. The vapor pressure of pure hexane at 25 ∘C is 151 torr.

*September 24, 2016*

**Algebra one**

What is the compatible number of 19% of 30

*September 22, 2016*

**Algebra**

1)More than 450 students went on a field trip. Ten buses were filled and 5 more students traveled in a car. a) Write an inequality to represent the situation. Be sure to define your variable. b) Solve the inequality to find the minimum number of people on each bus. b=# of ...

*September 17, 2016*

**Math**

Jason received an invoice for $5,000, and the invoice was dated on August 26 with terms of 2/10, n/45 EOM. Please answer the following questions: (1) How much did Jason owe if the bill is paid by September 26? (2) When will be the last day that Jason can receive the cash ...

*September 15, 2016*

**Math**

Explain how you know if a number can be divided by 10 evenly

*September 8, 2016*

**Math**

Eight increased by the product of 2 and two less than a number

*September 4, 2016*

**Physics**

Oh....I get it now! Thanks for your help! This has helped me understand many topics in Physics that we have covered this year! Thank you so much! You have no idea how much relief your help has brought me!

*September 3, 2016*

**Physics**

I think this is a two part question, but I don't understand what I am supposed to be solving for:( Do I frist solve for the distance from 0 - 8 seconds and then 9-12 seconds?

*September 3, 2016*

**Physics**

A car uniformly accelerates from rest at 3 m/s^2 for 8 seconds. At the end of the 8 seconds the car uniformly brakes at -5m/s^2 for 4 seconds. What total distance is traveled by the car during the 12 seconds of motion?

*September 3, 2016*

**Physics**

So, can speed be negative, or is velocity only negative?

*September 3, 2016*

**Physics**

Is the initial speed of the ball 0 m/s and the final speed 0 m/s?

*September 3, 2016*

**Physics**

A child throws a small ball vertically upwards. The ball is caught at the initial height 1.8 seconds after being thrown. What was the net displacement for the ball? What was the initial speed of the ball? What was the final speed of the ball? How high did it rise?

*September 3, 2016*

**Physics**

Thanks!

*September 3, 2016*

**Physics**

Do you mind if I verify a couple more questions? My physics background is not very strong:(

*September 3, 2016*

**Physics**

Oh...So it pauses for a second and then falls to the ground!

*September 3, 2016*

**Physics**

I get it now! I was confused about the final velocity. So, is the final velocity 0 m/s because that is when it hit the ground?

*September 3, 2016*

**Physics**

A ball is thrown straight up at an initial speed of 24 m/s. How long did it take to reach maximum height? How high did it rise before falling again? I am confused on how to attempt this problem. Please provide me with some guidance:)

*September 3, 2016*

**Physics**

(a) Find the electric field at x = 5.00 cm in Figure 18.52(a), given that q = 1.00X10^-6;C . (b) At what position between 3.00 and 8.00 cm is the total electric field the same as that for –2q alone? (c) Can the electric field be zero anywhere between 0.00 and 8.00 cm? (d...

*August 8, 2016*

**Physics**

(a) A narrow beam of light containing yellow (580 nm) and green (550 nm) wavelengths goes from polystyrene to air, striking the surface at a 30.0º incident angle. What is the angle between the colors when they emerge? (b) How far would they have to travel to be separated ...

*July 27, 2016*

**Physics**

At what positions is the speed of a simple harmonic oscillator half its maximum? That is, what values of x / X give v = ±vmax/2 , where X is the amplitude of the motion? Hello, I am so confused about this question. I am not really sure where to start. Thank you so much!

*July 24, 2016*

**Physics**

Your ear is capable of differentiating sounds that arrive at the ear just 1.00 ms apart. What is the minimum distance between two speakers that produce sounds that arrive at noticeably different times on a day when the speed of sound is 340 m/s?

*July 20, 2016*

**math**

Suppose you have a wallet with $5 bills, $10 bills, and $20 bills. If the probability of picking a $20 bill is 4/15, and the probability of piciing a $5 bill is 1/3, what is the probability of picking a $20 bill? a. 1/15 b. 1/5 c. 4/15 d. 2/5 **

*May 19, 2016*

**math**

Dina and Masha start out on a bike path 10 km long at the same time. When Dina reaches the end of the 10 km, Masha still has 2 km left to bike. If Dina’s biking speed is 5 km/h, find Masha’s biking speed.

*May 15, 2016*

**Math**

Write twenty million, five hundred ten thousand in expanded notation using exponents.

*May 4, 2016*

**life orientation**

Sexual abuse

*April 25, 2016*

**Chemistry**

I have a .01 M solution of N2, and the concentration of H2 in the same solution is .02. What is the Ksp.

*April 24, 2016*

**math**

A set of data items is normally distributed with a mean of 70. Convert the data item to a z-score, if the standard deviation is as given. data item: 80; standard deviation: 15

*April 17, 2016*

**Math**

suppose you have two prisms with the same volume. one is shaped like a cube and the other is "longer." which has the lesser surface area?

*April 9, 2016*

**Math**

Who were John Venns peers or any mathematicians working on the same thing as John during the same time as him?

*April 7, 2016*

**life orientation**

Sexual abuse and violence against women

*April 4, 2016*

**Math**

X is a normally distributed random variable with a mean of 8.00. If the probability that X is less than 9.54 is 0.67, then what is the standard deviation of X?

*April 2, 2016*

**Chemistry**

A sample of 0, 3220g of an ionic compound containing bromide ions (Br-) is dissolved in water and treated with excess of AgNO3. If the mass of the precipitate of AgBr formed is 0, 6964g, answer: a) what percentage of bromine in molar mass? b) Give the mass of bromine in the ...

*April 2, 2016*

**Chemistry**

A sample of 0, 3220g of an ionic compound containing bromide ions (Br-) is dissolved in water and treated with excess of AgNO3. If the mass of the precipitate of AgBr formed is 0, 6964g, answer: a) what percentage of bromine in molar mass? b) Give the mass of bromine in the ...

*April 2, 2016*

**Chemistry**

Thanks @DrBob222

*March 30, 2016*

**Chemistry**

Show how you would calculate the % yield of hydrogen if 40.0 grams of magnesium react with an excess of nitric acid producing 1.70 grams of hydrogen gas. Mg + 2 HNO3 ---> Mg(NO3)2 + H2

*March 30, 2016*

**Chemistry**

The network parameter of molybdenum 0.314 Valley nm and its density to 20° C 10.22 Valley g/cm3. Determine the crystalline structure of the molybdenum

*March 28, 2016*

**Simple Geography**

Thank you so much!!

*March 26, 2016*

**Simple Geography**

The provisions of the United Nations Conference of the Law of the Sea (UNCLOS) give coastal countries navigational and economic sovereignty over which of the following zones? A) 200-nautical-mile exclusive economic zone B) Export processing zone (EPZ) C) continental shelf D) ...

*March 26, 2016*

**Geography**

Thanks so much!!!!

*March 26, 2016*

**Geography**

I have a question regarding the answer. Is it geographical area because you can't adjust the population size?

*March 26, 2016*

**Geography**

Thank you so much!! You have no idea how much I appreciate your help!

*March 26, 2016*

**Simple Geography**

Is geographical area correct? Please help!

*March 26, 2016*

**Geography**

Whereas reapportionment adjusts the amount of political representation give to a certain geographical area, redistricting adjusts A) country, state and/or county boundaries. B) population size. C) the gerrymander. D) Federal lands. E) the geographical area. I think the answer ...

*March 26, 2016*

**Chemistry**

A rigid cylinder with a moveable piston contains 50.0 liters of a gas at 30c with a pressure at 1.00atm

*March 24, 2016*

**math**

A physics test has twenty questions worth 100 points. The test consists of true /false questions worth 3 points each and multiple choice questions worth 11 points each. How many multiple choice questions are on the test ?

*March 17, 2016*

**math**

The amount of Sandy earns from babysitting is proportional to the number of hours she works. She earns 45 dollars is 6 hours. what is the hourly rate of Sandy`s earnings?

*March 9, 2016*

**Chemistry 1**

i found the answer thanks so much for your time if you have read this!.

*February 15, 2016*

**Chemistry 1**

i need help as quickly as possible because i am taking a summative practice test and this question i don't understand how to work it out. can you please explain? here is the question: Arrange the following in order of increasing oxidation number of the sulfur atoms in ...

*February 15, 2016*

**Mathematics**

Please correct me if my answer is wrong... thanks 1. 6(11-(3+1)^2+3) =-12 ------------------------------------ Here is my working out 6(11-(4)^2+3 6(11-16+3) 6(-5+3) 6(-2) -12

*February 10, 2016*

**math**

Thank you

*January 30, 2016*

**math**

The box plots below show the average daily temperatures in January and December for a U.S. city: two box plots shown. The top one is labeled January. Minimum at 0, Q1 at 10, median at 12, Q3 at 13, maximum at 16. The bottom box plot is labeled December. Minimum at 1, Q1 at 5, ...

*January 30, 2016*

**Math**

I need help on these two too

*January 29, 2016*

**English**

Formal schooling is basically when you get schooled through credital sources

*January 27, 2016*

**Biology**

What is an ecological footprint and why does Nothern Americans have such large ecological footprints?

*January 27, 2016*

**Biology**

What causes acid precipitation, and what are the negative effects of acid precipitation?

*January 27, 2016*

**Biology**

What's an ecological niche?

*January 27, 2016*

**Biology**

Define and give examples of predation, competition, and symbiosis.

*January 27, 2016*

**Biology**

What is the difference between endangered and extirpated?

*January 27, 2016*

**Biology**

What is the difference between tolerance range and optimum range in Biology?

*January 27, 2016*

**Biology**

What is an invasive specie, and what are some negative effects of an invasive species?

*January 27, 2016*

**Biology**

What is pesticide resistance? Why is it that biological control is a good solution to the problem of pesticide resistance?

*January 27, 2016*

**Biology**

What's the difference between Bio accumulation and Bio amplification?

*January 27, 2016*

**Biology**

How does Nutrients get affected from surface runoff in Biology? If in detail, you could explain what exactly is Surface Runoff, and what causes it, that'd be of great help !

*January 27, 2016*

**Re:BIOLOGY**

Whats the relation between Photosynthesis and Cellular Respiration? Is it, because they have complimentary proccesses?

*January 27, 2016*

**RE:Biodiversity**

Sorry I have a lot, final exams tommorow! Whats the relation between Photosynthesis and Cellular Respiration?

*January 27, 2016*

**Biology**

Also, sorry if I may ask a lot of questions, I am just preparing for my exam tomorrow.

*January 27, 2016*

**Biology**

Thanks Ms.Sue Don't worry

*January 27, 2016*