Wednesday

October 7, 2015
Total # Posts: 907

**Phyics**

A particle, which starts from rest, covers a distance of 19.94 cm in the first 8.6 seconds. Find the acceleration (in m/s2) of the particle at the end of 8.6 seconds.
*September 26, 2015*

**stats**

If a student scored 75 points on a test where the mean score was 83.5 and the standard deviation was 3.1. The student's z score is ________.
*September 15, 2015*

**Math**

Write each number is scientific notation. 291.7 0.0960 is it 2.917 x 10^ 3 and 9.60 x 10^-2? help!! thanks!!
*September 11, 2015*

**prealgebra**

10 points X 7 times = 70 points Additional 100 points = 100 points 70 points + 100 points = 170 points
*September 10, 2015*

**PHI103**

All Whales are mammals. All mammals have hair or fur. Therefore, all whales have hair or fur. True or False: There is no conclusion in these propositions. True False Don’t worry, when I come back from my trip we’ll be more in love than ever. After all, absence makes...
*July 11, 2015*

**algebra (check my work)**

thanks
*May 25, 2015*

**algebra (check my work)**

60% of what number is 24? a/w = p/100 24/w = 60/100 24 * 100 = 60* w 2400 / 60 = 60w / 60 w = 40 am i correct?
*May 25, 2015*

**math**

x does not equal 7 because on list b 7/8 = 87.50% and therefore is greater than 33%
*May 4, 2015*

**math**

tell what whole number you can substitute for x in each list so the numbers are ordered from least to greatest. a. 2/x, x/22, 33% b. 1/x, x/8, 33%
*May 4, 2015*

**Math**

A rectangle has an area of 48 square yards. For what whole number values of length & width will the rectangle have the smallest perimeter?
*April 29, 2015*

**Math**

The areas of the rectangular faces of the box are shown( 90 in.², 60 in.², & 54 in.²). What is the volume of the box?
*April 29, 2015*

**Math **

The area of each unshaded rectangle is given (the areas given are ( 30 in.², 45 in.², 72 in.²)). What is the area of the shaded rectangle?
*April 29, 2015*

**Math **

For what whole number values of length and width will the rectangle have an area of 60 square yards and I'm perimeter of 38 yards?
*April 29, 2015*

**Math **

An airplane is at an altitude of 10 km. You spot the airplane at an angle of 55 degrees . How far away Is the airplane directly from you? Give your answer to the nearest kilometre.
*April 11, 2015*

**Math**

If a grasshopper jumped a vertical distance of 1.5 cm and horizontal distance of 8.0 cm,at what angle did it rise from the ground?
*April 11, 2015*

**Math **

A 6 m ladder is leaning against the wall of a house. The angle between the ladder and the ground is 68 degrees. How far away is the ladder from the wall.? How high up the house does the ladder reach ? Give your answers accurate to two decimal places.
*April 11, 2015*

**Math**

A 6 m ladder is leaning against the wall of a house The angle between the ladder and the ground Is 60 degrees . How far away is the ladder from the wall? How high up the house does the ladder reach? Give your answers accurate to two decimal places
*April 10, 2015*

**math**

Terry, Corey, and Chris together made 20 baskets in a basketball game. Terry made 5 more than Corey. Chris made 3 times as many as Corey. How many baskets did they all have?
*March 26, 2015*

**science**

If I fire three arrows at 20 degrees, 40 degrees and 60 degrees, which arrow will go the farthest?
*March 23, 2015*

**math **

Find three mixed numbers so that the sum is 18 and the difference between the greatest number and the least number is 5 1/5.
*March 19, 2015*

**sociology**

what are subtopics for education
*March 19, 2015*

**sociology**

Talcott Parsons has suggested that with increasing institutional role specialization in modern societies, the family has taken on fewer functions” Based on your experience, apply this functionalist perspective to evaluate the main functions of a Caribbean family today.
*March 17, 2015*

**Chemistry**

What volume of .225 M aluminum chloride solution contains 5.0 g solute?
*March 12, 2015*

**using skills**

Hmm, this is the most approiate age to learn about sex and sexual education. DEEZ NUTS HUEUHEHe
*March 5, 2015*

**sociology**

Talcott Parsons has suggested that with increasing institutional role specialization in modern societies, the family has taken on fewer functions” Based on your experience, apply this functionalist perspective to evaluate the main functions of a Caribbean family today
*February 26, 2015*

**chemistry**

a mixture of NaCl and sucrose that has a combined mass of 10.20g is dissolved in enough water to make up to a 250mL solution. osmotic presdure of solution is 7.32atm at 23℃. calculate the mass percent of NaCl
*February 25, 2015*

**Statistics**

The time to fly between New York City and Chicago is normally distributed with a mean of 180 minutes and a standard deviation of 17 minutes. What is the probability that a flight is more than 200 minutes?
*February 10, 2015*

**STATS**

. The time to fly between New York City and Chicago is normally distributed with a mean of 180 minutes and a standard deviation of 17 minutes. What is the z-score that corresponds to a random variable X outcome of 190 minutes?
*February 8, 2015*

**pre-algebra**

Both are correct
*January 28, 2015*

**math**

Eric Rose wants to buy a Ford Explorer that costs $26,000 with an interest charge of $3,000. If there are 50 equal payments required, what will Eric's monthly payment be?
*January 26, 2015*

**Math**

What are the domain and range for 2(y-1)= - the square root of 1/3x-6
*January 26, 2015*

**Geometry**

The surface of a cube is painted red and blue, 3 sides of each. The cube is cut into 27 equal sized smaller cubes. Find both answers to the question, "How many cubes have at least 2 sides painted blue?" and "How many cubes have at least 1 side painted red?"...
*January 24, 2015*

**Geometry**

How many different surface areas are possible when 8 one inch cubes are arranged so that each has one or more faces in common (touching) with at least one of the other cubes? We have to use a physical model. And I have no idea how to start this or even do it. Please be ...
*January 24, 2015*

**Maths**

Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a large population ...
*January 22, 2015*

**Math**

If the probability of landing on a certain color is p, write an expression for the probability of not landing on that color or the complement. Suppose the probability of p is 1/4. Solve the expression and explain their relationship. The wheel has 4 colors: 2 parts a red 2 are ...
*January 6, 2015*

**science**

how are relative dating and absolute dating different
*December 25, 2014*

**math**

The overall probability of a student failing an exam is 40%. Calculate the probability that in a group of 6 students, at least 4 passed the exam.
*December 13, 2014*

**Calculus**

Find the length of the entire perimeter of the region inside r=15sin(theta) but outside r=1. I am not sure how to start the problem
*December 12, 2014*

**Math**

What is log x + log x + log x = 3? I want to say 3000 since 10^3=1000, then three times makes 3000.
*December 8, 2014*

**HUNGER GAMES!!!**

what was recreation like in the capitol compared to other districts!!! please help!!!
*November 29, 2014*

**English**

Where would I put the apostrophe on: Close the children's mouths? Since there is more than one child and more than one mouth, is it before or after the s?
*November 16, 2014*

**English**

Does motion sensing need a hyphen?
*November 16, 2014*

**English - grammar**

I need my sentence to be past tense third person. I know my main verb 'caused' is past tense, but the 'prime acting citizens' phrase is confusing me since 'acting' ends in 'ing', which is not past tense. Do I need to change it to make it past ...
*November 14, 2014*

**Algebra**

He means you want f(x) to equal g(x). I.e. f(x) = g(x) [NOT g(x) = g(x)] When you set two equations equal to each other you find the points of intersection.
*November 9, 2014*

**Algebra**

They intersect at two points. (1, 2) and (-1,-2).
*November 9, 2014*

**Algebra**

There is a program called Graph. You can google it by typing in "graph", download it for free, and put in those equations to find the intersection.
*November 9, 2014*

**8th grade**

A camera manufacturer spends $2050 each day for overhead expenses plus $7 per camera for labor and materials. The camera sells for $17 each. a. How many cameras must the company sell in one day to equal its daily costs? b. If the manufacturer can increase production by 50 ...
*October 15, 2014*

**math**

T.Y. Ms. Sue
*October 8, 2014*

**math**

use counters to model problems.1.Oliver has one juice box.Lucy has one fewer juice box than Oliver.How many juice boxes does Lucy have? Write the number. answer 1/2?
*October 8, 2014*

**Physics**

67.8 degrees
*September 13, 2014*

**need answer to check sons work**

alica finished the race 3.75 seconds before kaye. donna finished the race 5.09 seconds after carmen. carmen finished the race 10 seconds before kaye. ardens finished 4.89 seconds after kaye. how many seconds earlier did carmen finish than anders
*September 5, 2014*

**algebra**

alica finished the race 3.75 seconds before kaye. donna finished the race 5.09 seconds after carmen. carmen finished the race 10 seconds before kaye. ardens finished 4.89 seconds after kaye. how many seconds earlier did carmen finish than anders
*September 5, 2014*

**math**

I counted a total of 40 white and yellow cars. I have 9 times as many white cars as yellow how man white cars do I have?
*September 4, 2014*

**Maths**

In a class of 75 students,15 are above average,45 are average and the rest below average achievers.The probability that an above average achieving student fails is 0.005,then an average achieving student fails is 0.05 and the probability of a below average achieving student ...
*August 17, 2014*

**Maths**

Bag A contains 2 white, 1 black and 3 red balls, Bag B contains 3 white, 2 black and 4 red balls and Bag C contains 4 white, 3 black and 2 red balls. One Bag is chosen at random and 2 balls are drawn at random from that Bag. Of the randomly drawn balls happen to be red and ...
*August 17, 2014*

**Chemistry**

A 0.60 g sample consisting of only CaC2O4 & MgC2O4 is heated at 5000C, converting the two salts of CaCO3 and MgCO3 . The sample then weighs 0.465 g. If the sample had been heated to 9000C, where the products are CaO & MgO, what would the mixtures of oxides have weighed? a) 0....
*July 26, 2014*

**Chemistry**

1 mole of equimolar mixture of ferric oxalate and ferrous oxalate will require xmole of KMnO4 in acidic medium for complete oxidation, x isis: a) 0.5 mole b) 0.9 mole c) 1.2 mole d) 4.5 mole
*July 26, 2014*

**Chemistry**

A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)
*July 26, 2014*

**Chemistry**

Nitric acid can be produced from NH3 in three steps process: I)4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) II)2NO(g) + O2(g) → 2NO2(g) III)3NO2(g) + H2O(l) →2HNO3(aq) + NO(g) % yield of Ist, IInd & IIIrd are respectively 50 % , 60 % & 80 % respectively the what ...
*July 26, 2014*

**Chemistry**

Calculate the number of millilitres of NH3(aq) solution (d = 0.986 g/ mL) contain 2.5 % by weight NH3 which will be required to precipitate iron as Fe(OH)3 in a 0.8 g sample that contains 50 % Fe2O3.
*July 26, 2014*

**Can anyone help with this paragraph??? english**

they only asked for colons and semi colons where needed.. this is an example they placed: Example: We landed in San Juan, Puerto Rico, for three reasons the weather was bad, the crew had the flu, and the fuel was getting low it was an exciting trip. Revision: We landed in San ...
*July 17, 2014*

**Can anyone help with this paragraph??? english**

Rewrite the following paragraph. Add colons and semicolons where needed. Note that a spelling/grammar-checker does not always catch these errors. One of the most exciting experiences in my life was traveling to Uruguay in South America in June of 2005, through the end of ...
*July 17, 2014*

**Help english**

thanks so much
*July 17, 2014*

**Help english**

Revise the sentences. (1) Revise the following sentence so that the subject and verb of each sentence identify key actors and actions: Currently, the percentage of full-time African-American professors teaching in American universities is less than eight. African American ...
*July 17, 2014*

**English - Miss Sue Help!!!**

thanks for your assistance
*July 16, 2014*

**English - Miss Sue Help!!!**

Rewrite the following paragraph. Add colons and semicolons where needed. Note that a spelling/grammar-checker does not always catch these errors. One of the most exciting experiences in my life was traveling to Uruguay in South America in June of 2005, through the end of ...
*July 16, 2014*

**English**

Rewrite the following paragraph. Add colons and semicolons where needed. Note that a spelling/grammar-checker does not always catch these errors. One of the most exciting experiences in my life was traveling to Uruguay in South America in June of 2005, through the end of ...
*July 16, 2014*

**English**

Rewrite the following paragraph. Add colons and semicolons where needed. Note that a spelling/grammar-checker does not always catch these errors. One of the most exciting experiences in my life was traveling to Uruguay in South America in June of 2005, through the end of ...
*July 15, 2014*

**English**

(2) Revise the following groups of sentences. Combine each group of sentences into a single cohesive sentence. • Plato was born around 428 B.C. His family was part of the Roman aristocracy. Many of his family members were active in politics. But Plato consciously resisted...
*July 15, 2014*

**English**

i'm going back to the books
*July 15, 2014*

**English**

In American Universities African-American professors are currently teaching full time. In American Universities less than eight percent of the professors are African American
*July 15, 2014*

**English**

African American professors teaching full time at American universities is less than eight percent Less than eight percent of the professors at American Universities are African American.
*July 15, 2014*

**English**

ok i'm working on it
*July 15, 2014*

**English**

Revise the following sentences so that the subject and verb of each sentence identify key actors and actions: • The dedication of professors to multiculturalism is crucial to encouraging students of all races to succeed. o To encourage students of all races to succeed, it...
*July 15, 2014*

**chemistry**

If the pH of an aqueous solution is 5, what is the OH− concentration?
*June 8, 2014*

**chemistry**

What is the pH of a water solution at 25◦C in which the hydroxide ion concentration is 9.8 × 10−6 mol/L?
*June 8, 2014*

**chemistry**

Calculate the [H+] for a solution with [OH−] = −80 M. 1x10*-14/-80=-log(answer) How would I do this since I can not take the negative log of the previous anwser
*June 8, 2014*

**chemisrty**

The pH of a solution changes from 5.5 to 3.5. This indicates that the [OH−] of the solution has 1. increased by a factor of 100. 2. increased by a factor of 2. 3. decreased by a factor of 2. 4. decreased by 2 M. 5. decreased by a factor of 100. 6. increased by 2 M.
*June 8, 2014*

**chemistry**

1. H2O is the conjugate base of CONH2NH+ 3 . 2. The hydroxide ion is the conjugate acid of CONH2NH+ 3 . 3. The hydroxide ion is the conjugate base of CONH2NH+ 3 . 4. CO(NH2)2 is the conjugate base of CONH2NH+ 3 . 5. CO(NH2)2 is the conjugate acid of CONH2NH+ 3 . 6. H2O is the ...
*June 8, 2014*

**chemistry**

Urea (CO(NH2)2) can react with water to form CONH2NH+ 3 and a hydroxide ion. Which statement is true for this reaction?
*June 8, 2014*

**chemisrty**

Rank following acids frommost to least acidic: hydrocyanic acid (HCN) Ka = 6.2 × 10−10 hypoiodous acid (HOI) Ka = 2 × 10−11 chlorous acid (HClO2) Ka = 1.2 × 10−2 acetic acid (CH3COOH) Ka = 1.8 × 10−5 1. HOI > HClO2 > ...
*June 8, 2014*

**chemistry**

Calculate the pH of an aqueous solution of 11.5 mg of KOH dissolved in 56 mL of solution.
*June 8, 2014*

**Chemistry**

i Figured it out. The answer is none
*June 3, 2014*

**Chemistry**

or 4
*June 3, 2014*

**Chemistry**

8,5, and 1 are wrong
*June 3, 2014*

**Chemistry**

these are the choices 1. Only I and III are true. 2. I, II, and III are true. 3. Only II is true. 4. Only III is true. 5. Only I and II are true. 6. None is true. 7. Only II and III are true. 8. Only I is true.
*June 3, 2014*

**Chemistry**

I plugged in the anwser and it was wrong. I tried putting in 1 and 1 and 3
*June 3, 2014*

**Chemistry**

that answer is not correct
*June 3, 2014*

**Chemistry**

I: The standard reaction free energy at equilibrium is zero. II: A reaction stops when the equilibrium is reached. III: An equilibrium reaction is not affected by increasing the concentrations of products. Which of these statements is/are true?
*June 3, 2014*

**Chemistry**

Consider the reaction HCHO(g) *) H2(g) + CO(g). 1.0 mol of HCHO, 1.0 mol of H2 and 1.0 mol of CO exist in equilibrium in a 2.0 L reaction vessel at 600C. a) Determine the value of the equilibrium constant Kc for this system. 2.0 moles of HCHO and 1.0 mol of CO are then ...
*June 3, 2014*

**Chemistry**

What is the specific heat? And tfinal and tinitial?
*May 21, 2014*

**Chemistry**

Suppose that coal of density 1.5g/cm3 is pure carbon. The combustion of carbon is described by the equation C+O2---> CO2 ∆H◦ = −394 kJ What is the value of q (heat) a ump of coal the size of 7.5cm*7cm*6.5cm is burned? answer in kJ what mass of water can be...
*May 21, 2014*

**Chemistry**

This is not correct. The answer is 11.2g i just do not know how to do the problem
*May 20, 2014*

**Chemistry**

what mass of hydrogen must be reachted with excess nitrogen to produce 5000. J of energy based on the reaction: 3H2+N2--> 2NH4+2709J
*May 20, 2014*

**science**

A sample of 8 grams of NaOH is dissolved into 599 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.68 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the ﬁnal solution? ...
*May 13, 2014*

**science**

What volume of ethanol must be diluted with water to prepare 674 mL of 0.854 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
*May 13, 2014*

**Chemistry**

What volume of ethanol must be diluted with water to prepare 674 mL of 0.854 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
*May 13, 2014*

**Chemistry**

A sample of 8 grams of NaOH is dissolved into 599 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.68 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the ﬁnal solution? ...
*May 13, 2014*

**English**

Of the two reports, hers is: A. worser. B. worse. C. worst. D. more worser. B
*May 13, 2014*