Friday

February 24, 2017
Total # Posts: 345

**5th grade math**

Darren finished 5/6 of his homework. Olivia finished 1/6 less than Darren. How much of Olivia's homework did she finish? Make sure to simplify your answer.

*January 9, 2017*

**Physics**

A non-homogeneous trunk, 5 meters long and 100 kilograms mass is in equilibrium and is hung at the ends by two strings; One form an angle of 37 degrees and the other an angle of 53 degrees, both with the horizontal. Determine the location of the center of mass of the trunk and...

*December 10, 2016*

**math algebra**

A tax free municipal bond pays 4.75% compounded continuously. What is the value of a $2,000 bond after 30 years? Round your answer to the nearest cent. [Hint- A=P e^rt where P= present(initial) value, A= future value, r= annual rate, and t= number of years] P.S.The rt is an ...

*December 1, 2016*

**Math**

Leah spent 5/6 of an hour doing homework on Monday on Tuesday she spent 3/4 of an hour and on Wednesday she did it in 5/8 of an hour How much time did she spend doing her honework on Minday Tuesday and wednesday I know how to concert 5/6 and 3/4 hour but not 5/8

*November 29, 2016*

**Probablility**

There are 4 cardio stations and six weight lifting stations at the gym. You decide to chose 4 stations randomly for today's workout. Whats the probability that you choose all weight lifting or all cardio?

*November 27, 2016*

**Calculus**

A lighthouse is built on an exposed reef, 5 miles off-shore. The shoreline is perfectly straight, and a town is located 9 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to the town to get fresh ...

*November 8, 2016*

**Physics**

a 50 kg ice skater is skating on a frozen lake where the ice has a coefficient of friction of .08. How much force is required to push her across the ice at a constant velocity?

*October 5, 2016*

**Physics**

You throw a water balloon hoping to hit your sibling. You throw it at an angle of 21.0° at 5.50 m/s. It ends up leaving your hand at a height of 1.70 m above the ground. It completely misses your sibling and breaks on the ground. How far did the water balloon travel?

*September 25, 2016*

**Physics**

You push a skateboard so that it rolls down the road at a speed of 0.700 m/s. You run after the skateboard at a speed of 3.90 m/s and while still behind the skateboard you jump off the ground at an angle of 28.0° above the horizontal hoping to land on the skateboard. How ...

*September 25, 2016*

**Math**

i got the answer now thanks for nothing

*September 12, 2016*

**Math**

so its A

*September 12, 2016*

**Math**

what is the vale of 4²-2(3÷5 + 1)? A 8 B 1 C -16* D -21

*September 12, 2016*

**Math**

1. what is the solution o 204 - (-36)? A 240** B - 240 C 168 D -168 2. what is the solution of 87 + (-396)? A 183 B -183 ** C 9 D -9 3. Evaluate: -12 x 3 =? A 36 B -36** C 4 D -4 4. Evaluate: -20 ÷ -10 =? A 200 B -200 C 2 **8 D -2 5. Select all the problems that have a ...

*September 12, 2016*

**Math**

which symbol is used to make -6 |-8| a true statement? A > B < C =

*August 24, 2016*

**Economics**

What factors do you need in order to calculate a country's level of development?

*May 29, 2016*

**math**

An account earns annual simple interest. Find the balance of the account. $2000 at 9% for 6 months = $

*May 25, 2016*

**math**

An account earns annual simple interest. Find the balance of the account. $250 at 4% for 1 year = $260 $2000 at 9% for 6 months = $?

*May 25, 2016*

**algebra 1**

Thank you!

*May 21, 2016*

**algebra 1**

Evaluate: 30 - m/6 for m = 30. a. 25 b. 0 c. 6 d. 1 i chose a. 25? please verify. thanks

*May 21, 2016*

**Life orientation**

Evaluate the physical,social and economic consequences of this crime to the offender

*May 1, 2016*

**Science**

Candy is correct I got 100%

*April 14, 2016*

**Math ratio**

Melanie mixes water with plant fertilizer in a proportional relationship that can be represented by the equation w=3p, where w is the number of quarts of water and p is the number of tablespoons of plant fertilizer. To keep this suggested ratio,should Melanie mix 1 quart of ...

*April 10, 2016*

**Science**

I got 100% the correct answers are 1. A 2. B 3. C 4. B :-)

*March 17, 2016*

**Math**

1.Male and female high school students reported how many hours they worked each week in summer jobs. The data is represented in the following box plots: two box plots shown. The top one is labeled Males. Minimum at 1, Q1 at 3, median at 10.5, Q3 at 14, maximum at 21. The ...

*February 22, 2016*

**TOURISM**

PROJECT INFLUENCE OF GLOBAL EVENTS ON TOURISM

*February 22, 2016*

**Art**

When creating a collection based on a message, an artist should consider all of the following except A. the audience the collection will the presented to B. the subject matter they most prefer using as a reference C. the dollar amount they wish to sell it for** D. the style ...

*January 15, 2016*

**Physics**

You have two tuning forks. One is a known frequency of 200 Hz. The second for his plate, there is a big frequency of five beats per second. What a piece of gum is placed on the second fork, the frequency increases three beats per second. What is the frequency of the second ...

*January 14, 2016*

**chemistry**

Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C? that is all of the information that was provided

*December 1, 2015*

**Social Studies**

B. the conquest and disease brought by Europeans changed the native American way of life forever.

*December 1, 2015*

**Chemistry**

it doesn't give the initial temp

*November 30, 2015*

**Chemistry**

Approximately how many joules of heat are needed to raise the temperature of a 4.0-gram sample of water to 8.0C?

*November 30, 2015*

**biology**

cytoskeleton-- Prokaryotes don't have a nucleolus as they do not have a nucleus (nucleolus only occur in nucleus) which leaves cytoskeleton

*November 30, 2015*

**English**

I thought so. Thank you again.

*November 24, 2015*

**English**

When the subject of the sentence is plural, should the nouns that follow agree with the subject's plurality? For example: In this stage, writers review and amend their paper to better articulate their intended message. Should the terms "paper" and "message&...

*November 24, 2015*

**physics**

I figured it out Solid Cylinder: v = sqrt 4gh/3 Hollow Cylinder: v = sqrt gh Hollow Sphere: v = sqrt (6/5)(g)(h) Solid Sphere: v = sqrt (10/7)(g)(h)

*November 5, 2015*

**physics**

A hollow cylinder, a solid cylinder, a hollow sphere, and a solid sphere roll down a ramp without slipping, starting from rest. The ramp is 0.25 m high. All the objects have radius 0.035. What are their final speeds? Please show what equation you used and what you plugged in...

*November 5, 2015*

**math**

698 is the answer man

*October 27, 2015*

**civics**

what are the 4 parts to the coercive acts?

*October 23, 2015*

**Physics**

two students working on physics assignment to find out how far window is from the roof of a building drop a ball over the edge of the roof the ball takes .1 seconds to travel from the top of the window to its bottom of a distance of 1 m assume the acceleration of gravity to be...

*October 19, 2015*

**Physics**

A child climbs up a set of stairs and reaches a height of 2.5m what is the child's gain I potential energy ?

*October 11, 2015*

**Math**

gena,freddie,and hank went running.gena ran 1/3 mile,freddie ran 4/7 mile,and hank ran 2/5 mile.who ran the farthest?

*October 8, 2015*

**physics**

A box of mass 50 kg starts from rest to slide down a ramp that makes an angle of 10.7 degrees with respect to the horizontal. 6.3 seconds later, it has covered a distance of 3.39 meters. What is the coefficient of kinetic friction?

*September 30, 2015*

**Math / Finance**

You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When you retire, you will ...

*September 20, 2015*

**Finance**

You are planning to save for retirement over the next 15 years. To do this, you will invest $1,100 a month in a stock account and $500 a month in a bond account. The return on the stock account is expected to be 7%, and the bond account will pay 4%. When you retire, you will ...

*September 19, 2015*

**life orientation**

extent to which bad road use has a direct impact on the physical

*August 23, 2015*

**algebra 2 and trig**

The scores on a chemistry test are normally distributed. Approximately 95 percent of the scores fell between 78 and 92. What is the standard deviation for this distribution?

*May 18, 2015*

**Chemistry**

That is part of what I am confused about. This is all I have, plus the half eqs, [Sn]2+ + 2e- <-> Sn (s) V -0.13 and [Pb]2+ + 2e- <-> Pb (s) V -0.126

*May 4, 2015*

**Chemistry**

What is the value of the equilibrium constant at 25°C for the reaction between each of the following? (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq) I have been unable to get either and have spent the last two hours attempting it. I have been using the equation K = 10^(...

*May 4, 2015*

**Literature**

Thank you for your help.

*April 30, 2015*

**Literature**

Okay... Odysseus needs to reconnect to his family for the sake of his own identity and for the sake of his family and the people of Ithaca. Is this still too vague? Could this be considered an argument?

*April 30, 2015*

**Literature**

I have an 8-10 page final essay due concerning the Odyssey. I know my topic I want to use for my essay is FAMILY. The problem I having is forming an argumentative thesis. My question is... How would I begin to form an argumentative thesis? I continue to argue the importance of...

*April 30, 2015*

**Literature**

I am currently writing a compare/contrast paper discussing Flannery O'Connor's literary works and Dennis Covington's novel Salvation on Sand Mountain. My question is... Would I use present perfect or past perfect when discussing Dennis Covington's novel ...

*April 26, 2015*

**Biology**

Could you potentially use up all of your memory B and T cells for a specific antigen and become susceptible to that antigen again?

*April 13, 2015*

**Chemistry**

A professor wanted to set up a similar experiment as the one you performed in lab. The professor wanted to use Al(OH)3 in place of Ca(OH)2. Calculate how many mL of saturated Al(OH)3 solution it would take to titrate against 12.00mL of 0.0542M HCl solution? The Ksp of Al(OH)3 ...

*April 8, 2015*

**Chemistry**

Thank you!! I got 15.6%!

*April 6, 2015*

**Chemistry**

Instead of using ratios for back titrations we can also use molarities if our solutions are standardized. A 0.188g sample of antacid containing an unknown amount of triprotic base Al(OH)3 was reacted with 25.0mL of 0.101M HCl. The resulting solution was then titrated with 10....

*April 6, 2015*

**Chemistry**

Instead of using ratios for back titrations we can also use molarities if our solutions are standardized. A 0.188g sample of antacid containing an unknown amount of triprotic base Al(OH)3 was reacted with 25.0mL of 0.101M HCl. The resulting solution was then titrated with 10....

*April 3, 2015*

**Science**

I got 100% *credit to haylee* 1. B 2. C 3. B 4. D

*March 19, 2015*

**Chemistry**

1. Imagine you have a saturated solution of Ca(OH)2, at equilibrium, that has some undissolved Ca(OH)2 precipitated on the bottom of the test tube. If you add an additional scoop of Ca(OH)2 to the solution will concentration of [OH-] in the solution (increase, decrease, or be ...

*March 16, 2015*

**Chemistry**

.0955molacid*.030L weak acid= .002865 mol acid/.1233 mol base= .02325 L base/2=11.62mL I got confused once I found my moles of acid, did I finish it correctly?

*March 11, 2015*

**Chemistry**

Calculate the volume at which pH = pKa if 30.00mL of weak acid with a concentration of 0.0955M is titrated against a strong base with a concentration of 0.1233M.

*March 11, 2015*

**Chemistry**

Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If 0.46 mol H2S is placed in a 4.6 L container, what is the equilibrium concentration of H2(g) at 700°C? So I thought that by using ice H2 would...

*March 9, 2015*

**Chemistry**

￼f=e^(-Ea/RT) f=e^(-151.0/(8.314e-3 x 292)

*March 4, 2015*

**Chemistry**

Never mind! I didn't change my R to kJ

*March 4, 2015*

**Chemistry**

At 19.0°C, what is the fraction of collisions with energy equal to or greater than an activation energy of 151.0 kJ/mol? I got 1.06 which wasn't right

*March 4, 2015*

**Art**

thanyou so much i got a 100

*March 2, 2015*

**Chemistry**

Thanks!!

*February 17, 2015*

**Chemistry**

If all the H2O2 in 25mL of a 3% solution of H2O2 decomposed, calculate the diameter of a sphere that would contain the resulting O2 at 1 atm and 296K. I understand how to do the problem if I have moles but I am not sure how to get moles. I thought n=0.075moles because 3% ...

*February 17, 2015*

**Chemistry**

The coinage metals -- copper, silver, and gold -- crystallize in a cubic closest packed structure. Use the density of gold (19.3 g/cm3) and its molar mass (197 g/mol) to calculate an approximate atomic radius for gold. Work So Far: {[1/(19.3x197)]x.74}/6.022e23 =3.2319e18 [(3....

*February 3, 2015*

**ela**

is there another way of saying better understand? the snetence im trying to write is "imagery can also help the reader to better understand the poem thus the reader is able to ...(is it appropriate to write better understand again here?)"

*February 2, 2015*

**equation and inequalities**

yeah

*January 2, 2015*

**Honors Physics**

A canoeist is trying to paddle upstream in a river that has a velocity of 6.1 m/s. If he can paddle his canoe at a velocity of 6.2 m/s, will he make any headway? What will his velocity relative to the shore be?

*December 18, 2014*

**Chemistry**

So I got 251.5 Is that right? And thank you so much!

*December 14, 2014*

**Chemistry**

A gas is allowed to expand at constant temperature from 4.274L to 6.877L against an external pressure of 1.977 atm. If at the same time the gas absorbs 773 J of heat from the surroundings, what is Delta E for this process? (Note: Pay attention to units; 1 L atm = 101.325 J) I ...

*December 14, 2014*

**Chemistry**

A 500 mL flask has a measured volume of 586.0 mL. A 0.608g sample of an unknown vapor occupies the flask at 373K at a pressure of 0.981atm. Assume the vapor behaves ideally. What is the molecular weight of the unknown vapor?

*December 7, 2014*

**Chemistry**

A student analyzing 2.000g of Epsom Salt found that it contained 39.0% by mass water. What is the hydration number for this sample?

*December 7, 2014*

**Chemistry**

A student was isolating copper metal from a copper salt. If the student started with 1.255g of copper (II) sulfate how many grams of copper solid would you expect them to recover?

*December 7, 2014*

**chem/science**

A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the reaction. (Alum MW=474.41 ...

*November 24, 2014*

**please help! physics**

A 1200 kg car is moving at 95 km/h when the driver notices a deer down the road. He immediately moves his foot toward the brake pedal, taking only 0.50 seconds before the car starts slowing down. The brakes cause a net force of 2400 N (backwards) on the car for 2.0 seconds. ...

*October 21, 2014*

**Science**

which term best describes the role carbon plays in the structure of compounds present in living things? A- a somewhat important role B- a fundamental role C- a minimal role

*October 3, 2014*

**life science**

fossils are important discoveries because they help us to understand and recreate the ancient past.

*July 31, 2014*

**Geology**

Hi, I am doing a geology course and I am really struggling with the topography graph. Currently, I am doing a test/quiz that involves me finding out what the contour interval is,the elevations of lines, and so on. I have tried looking back over the information but it is ...

*July 18, 2014*

**Chemistry**

8403.96

*July 1, 2014*

**Math Homework: Check Answers**

Thank you!

*May 27, 2014*

**Math Homework: Check Answers**

1. Suppose you earned 8t - 3 dollars on Monday and 6t + 5 dollars on Tuesday. What were you total earnings? Simplify your answer. A) 2t + 2 B) 2t - 8 C) 14t + 2 D) 14t - 8 Answer: A 2. f^2 • f^4 A) (2f)^8 B) (2f)^6 C) f^8 D) f^6 Answer: D 3. 100^12/100^8 A) 100^12/8 B) ...

*May 27, 2014*

**Data Management**

Emilio has played ten rounds of golf this season. His mean score is 80 and standard deviation is 4. Assume Emilio's golf scores are normally distributed. a) Find the 95% confidence interval of Emilio's mean golf score b)Find the 95% confidence interval of Emilio's ...

*May 14, 2014*

**physics**

A square loop of wire of side 2.8 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 43° with the plane of the loop. (a) What is the magnitude of the torque on the loop? (b) What is the net magnetic force on the loop?

*May 13, 2014*

**physics**

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

*May 12, 2014*

**Algebra 1**

Can you please check my work? A city planning committee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Is this an example of a: random sample, systematic sample, self-selected sample, convenience sample, bipartisan sample, or ...

*April 27, 2014*

**Algebra 1**

Will you please check my work? :) Choose ALL (if any) applicable terms for the events described, then calculate the probability of the events. Jason has a cube with colored sides: red, orange, yellow, green, blue and purple. 1. Rolling a red or a primary color. Choices: ...

*April 27, 2014*

**Algebra 1**

Thanks :)

*April 27, 2014*

**Algebra 1**

Can you please check my work and help me with the parts that I don't understand? For each event, choose the most appropriate term and solve the problem. 1. In a sweepstakes with nine hundred entries, the first winner selected receives the grand prize, the second receives ...

*April 27, 2014*

**Chemistry**

Write the balanced net ionic equations for the reactions of the halogens with copper metal. The halogens are oxidizing agents and the copper metal is a reducing agent. a) Bromine (Br2)+copper metal (Cu) b) Iodine (I2) + copper metal (Cu) Based on your observations and ...

*April 16, 2014*

**math**

What is 8% of 15?

*April 14, 2014*

**Math Polygons**

I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.

*March 19, 2014*

**Chemistry**

a solution is prepared by dissolving 22.0g of NaOH in 117.0g of water. The NaOH solution has a density of 1.15 g/mL. what is the Molarity(M) of the solution.

*March 14, 2014*

**please check(Social studies)**

Karen is correct GOOD JOB:)

*March 14, 2014*

**ALGEBRA! URGENT.**

1. What data are represented by the stem-and-leaf plot below? 3 | 7 8 9 4 | 1 3 7 5 | 2 4 Key: 4 | 1 means 41 a. 37, 38, 39, 41, 43, 47, 52, 54 b. 73, 83, 93, 14, 34, 74, 25, 45 c. 7, 8, 9, 1, 3, 7, 2, 4 d. 37, 38, 39, 14, 34, 74, 25, 45 2. Find the mode and the median of the ...

*March 5, 2014*

**Math Help? Check my answers.**

Ms. Sue? Can you help me with this?

*March 5, 2014*

**Math Help? Check my answers.**

Help please! :)

*March 5, 2014*