Saturday

April 30, 2016
Total # Posts: 823

**Maths**

Bob has 15 more cards than Alan. Colun gives Bib 25 cards. Bob now has 3 times as many as Alan. How nany has Alan got?
*April 27, 2016*

**technology**

You want to discard your old computer and want to securely erase the data from your hard drive. What can you use to do this and what is the process called?
*April 19, 2016*

**science **

if a force of 3000 N can move a crate at an acceleration of 4.0 M/S what is the mass of the crate
*April 11, 2016*

**Physics **

A crate is initially at rest and then slides down a long inclin that is 30 degrees above the horizontal. If the coefficient of kinetic friction is 0.40, the speed of the crate after 5s is ?
*March 30, 2016*

**Physics**

A pellet (20g) is launched horizontally off a cliff (20m high) from a spring-loaded gun. The spring has constant k= 1800 N/m and is compressed 0.10m before launch. How much energy is stored in the spring before launch? If all that energy is transferred to the pellet, how fast ...
*February 23, 2016*

**chemistry**

Using the following equation 2C2H2 + 5O2 -> 4CO2 + 2H2O what volume of oxygen would be needed to react with 89.6L of C2H2 at a temp of 273 and a pressure of 101.3 kpa. I can't seem to figure out my first step. Using PV=NRT should I do initial and final conditions? I ...
*February 3, 2016*

**Algebra**

What is the slope of the line that passes through the pair of points (3,8) and (9,5)? A. -2 B. 2 C. 1/2 D. -1/2 What is the slope of the line that passes through the pair of points (-7/2, -3) and (-5, 5/2)? A. 6/22 B. -6/22 C. 22/6 D. -22/6 Write and equation in point-slope ...
*January 12, 2016*

**algebra**

the seventh term of a arithmetic sequence is 72 and the tenth term of the sequence is 90. if the sequence is defined by a formula f(n), then find f(2). How would you do this?
*January 11, 2016*

**Science**

Give two reasons why so little is known about organisms from the Precambrian time, even though it was the longest period and early earth's history?
*January 8, 2016*

**math grade 1**

1 bike = 2 wheels, one seat so 19 /2 =9.5 =9 wheels 4 bikes one tricycle = 3 wheels one seat 6 trikes
*January 7, 2016*

**MATH**

substitute 7 in x spot so 4 (7-4)=4(3)=12
*January 7, 2016*

**Physics-Conservation of Momentum**

3. A train loaded with steel, moving at 90km/h, collides head on with a stationary train of mass 6000kg. if the trains couple after collision and move forward with a velocity of 80km/h, find the mass of the train loaded with steel. My work so far: PTO=PTF mivi+m2v2=mvf mi (25m...
*January 7, 2016*

**Physics**

2. Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. Show your work. Answer: g= GM/r² G= 6.67 * 10^-11 Nm²/kg² ME= 5.98 * 10^24 kg RE=...
*December 10, 2015*

**Algebra!!**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 D. 1/3 2. A line has a slope -5/3. Through which two points could this line pass? A. (12, 13) and (17, 10) B. (16, 15) and (13, 10) C. (0, 7) and (3, 10) D. (11, 13) and (8...
*November 30, 2015*

**Algebra**

1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)? A. -3 B. -2 C. -1/3 D. 1/3 2. A line has a slope -5/3. Through which two points could this line pass? A. (12, 13) and (17, 10) B. (16, 15) and (13, 10) C. (0, 7) and (3, 10) D. (11, 13) and (8...
*November 29, 2015*

**Algebra**

1. What are the next two terms of the following sequence? 1, 5, 9... A. 27, 211 B. 10,11 C.12,15 D.13,17 2. Which of the following are examples of arithmetic sequences? Choose all that apply. A. -2,2,6,10 B. 1,3,9,27 C. 5,10,20,40 D. 5,1,-3,-7 3. What is the common difference ...
*November 19, 2015*

**geometry**

Raul is laying a cement concrete walkway in his backyard. He decides to put a turn of 30° from the horizontal in the walkway to go around a tree and flowerbed. Once he gets past the tree, he wants to continue the walkway in the same direction as before. At what angle ...
*November 17, 2015*

**Algebra**

Tim's scores the first five times he plays a video game are listed below. 4,526 4,599 4,672 4,745 4,818 Tim's scores follow a pattern. Which expression can be used to determine his score after he played the video game n times. A.) 73n + 4,453 B.) 73(n + 4,453) C.) 4,...
*November 16, 2015*

**Math**

The answer would be 122 degrees Fahrenheit.
*November 16, 2015*

**Language Arts**

Which of the following correctly revises the the sentence so that it is entirely in active voice? A. It has been decided by the school at the regular teacher should not evaluate the class; instead, the assessment should be performed by a visiting scholar. B. The school has ...
*November 15, 2015*

**Math**

Shiela spent $120 on a coat. She spent 2/3 of her remaining money on a dress. She's left with 1/5 of her money. How much he money did she have to begin with?
*November 8, 2015*

**algebra**

the sum of 2 consecutive integers is at most the difference between nine times the smaller and 5 times 5 the larger
*November 4, 2015*

**Chemistry**

Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (3.2x10-3), complete the reaction table for vinegar. Then calculate the acidity constant. Reaction table is given Ch3COOH + H2O --CH3COO- + H3O+ Initial. Change equilibrium
*October 15, 2015*

**Algebra**

A triangle has an area of 65ft. Its height is 3 ft more than its base. Find the measure of the base
*October 14, 2015*

**math**

is X cubed symmetric about the x-axis, Y axis, the origin, or none?
*October 12, 2015*

**Health**

In order to loose weight you have to ___? A. Burn less calories than you consume B. Burn more calories than you consume C.Eat more D.Eat less
*September 30, 2015*

**statistics**

suppose that from 8 students, we want to take a committee of students? How many committees of 3 can be selected? How many of 4?
*September 20, 2015*

**Physics**

You are asked to consult for the city's research hospital, where a group of doctors is investigating the bombardment of cancer tumors with high-energy ions. The ions are fired directly toward the center of the tumor at speeds of 5.6 ×106m/s. To cover the entire tumor...
*September 13, 2015*

**Social Studies**

How did the movement of people affect historical events?
*August 10, 2015*

**english 3**

which choice contains broad pronoun reference?
*August 2, 2015*

**chemistry**

HCOOH + CaCO3 will give what (what are the products)
*July 31, 2015*

**English four**

Identify the gerund phrase and identify the noun function of the gerund. Brett earn his income by repairing cars
*July 29, 2015*

**How Children Learn**

1. Which of the following is an essential ingredient of academic self-esteem? A. Individual assignments requiring problem solving (me) B. Acceptance by teachers and teacher aides C. Meeting deficiency and growth needs D. A school without grades 2. What kind of responses do ...
*June 4, 2015*

**geometry and measurement**

Lila wants to build a fence around her pool. The pool is 25 feet long by 15 feet wide. The fence is to be 10 feet from the edge of the pool. how many feet of fencing will she need?
*May 5, 2015*

**Calc**

The marginal cost of manufacturing x yards of a certain fabric is C′(x)=3−0.01x+0.000006x2 (in dollars per yard). Find the increase in cost if the production level is raised from 3500 to 8500 yards. Increase in cost =
*April 28, 2015*

**chemistry**

How many grams of oxygen gas must react to give 2.70g of ZnO? 2Zn(s)+O2(g)→2ZnO(s)
*April 20, 2015*

**Physics**

A stone is catapulted at time t = 0, with an initial velocity of magnitude 18.6 m/s and at an angle of 41.6° above the horizontal. What are the magnitudes of the (a) horizontal and (b) vertical components of its displacement from the catapult site at t = 1.06 s? Repeat for...
*April 19, 2015*

**global history**

is it that the studies will make him fluent and bold and self confident in speaking with everyone.
*April 14, 2015*

**global history**

can you help me answer it I am still a little confused
*April 14, 2015*

**global history**

They were expected to know several languages, understand philosophy and scientific teachings, appreciate literature and art, and further, to be deft sportsmen.
*April 14, 2015*

**global history**

is this okay so far, what should I add?
*April 14, 2015*

**global history**

the study of art leads to individual achievement and this leads to advances in math and sciences and this leads to more jobs
*April 14, 2015*

**global history**

The qualities of a "Renaissance man" reflected the political and social values of the Renaissance as these qualities were based upon a high regard for human worth and a realization of what individuals could achieve. is this correct?
*April 14, 2015*

**global history**

to what extent are studies in the arts important to the success of a renaissance man?
*April 14, 2015*

**physics**

A crane operator intends to lift a 300 kg piece of equipment using an upward force of 4000 N, will he be able to lift the equipment.
*April 12, 2015*

**Integral**

Calculate the integral of (1/(u^(5/4)))+5.5√u du
*April 9, 2015*

**History**

is this correct?
*April 8, 2015*

**History**

The qualities of a "Renaissance man" reflected the political and social values of the Renaissance as these qualities were based upon a high regard for human worth and a realization of what individuals could achieve.
*April 8, 2015*

**Chemistry**

56mL of a stock solution of hydrobromic acid, HBr, is added to 85mL of water, yielding a solution having a pH of 1.0. What was the molarity of the stock solution? I know Molarity = moles of solute/ liters of solution
*March 31, 2015*

**Physics **

Cart A has a mass of 10kg and is moving towards cart B at a speed of 15 m/s. If cart B is moving towards cart A with a speed of 5 m/s, what mass must Cart B have to stop both carts upon collision?
*March 26, 2015*

**Calculus **

A manufacture has been selling 1300 television sets a week at $420 each. A market survey indicates that for each $16 rebate offered to a buyer, the number of sets sold will increase by 160 per week. a) Find the price p(x) of each television as a function of x, where x is the ...
*March 25, 2015*

**Calculus**

A model for the food-price index (the price of a representative "basket" of foods) between 1984 and 1994 is given by the function I(t)=0.00009045t5+0.001438t4−0.06561t3+0.4598t2−.6270t+99.33 Where t is measured in years since midyear 1984, so 0≤t&#...
*March 25, 2015*

**Calculus**

The manager of a large apartment complex knows from experience that 80 units will be occupied if the rent is 460 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 10 dollar increase in rent. Similarly, one ...
*March 25, 2015*

**math **

The outside diameter of a pipe is 5 and 7/32 inches. The walls of the pipe are 5/32 inches thick. find the inside diameter
*March 12, 2015*

**math**

You have 160 boxes of cookies. In each case you can pack 8 boxes of cookies. How many cases would be filled from these boxes of cookies? I'm not sure if i do 160*8 or what i believe its 20 instead of 1280
*March 12, 2015*

**math**

ok thanks
*March 12, 2015*

**math**

The temperature dropped from 6 Celsius to -5 Celsius. How many degrees did the temperature drop?
*March 12, 2015*

**Child education**

As Ms. Ramirez planned for her group time, she considered the best way to begin. Which one of the following would NOT be an effective way for her to begin group time? A. Asking individual children if they brought something to share B. Leading children in the finger play "...
*March 3, 2015*

**Chemistry**

Calculate the number of grams of propane (C3H8) consumed if 17.7 g of water is produced according to the reaction: C3H8(g)+5O2(g)=3CO2(g)+4H2O(g)
*February 16, 2015*

**chemistry**

A freezing point depression experiment was conducted using cyclohexane as the solvent. The freezing point of pure cyclohexane is 6.60°C and the freezing point depression constant is 20.00°C/m. The freezing point of a solution containing 0.135 g of an unknown ...
*February 16, 2015*

**Math**

A math teacher wishes to use groups of 5 and/or 7 students for a class assignment. When she tries to make assignments she notices that it cannot be done with the number of students in her class. However, if the number of students were any larger, the assignments could be made...
*January 30, 2015*

**language arts**

Multi-draft reading the meaning
*January 27, 2015*

**math**

how can you rename a mixed number to help you subtract
*January 26, 2015*

**Social Studies**

? I think it might be c but I ma not 100% sure
*January 18, 2015*

**math**

Jamal made a list of fractions and asked Will to find the fraction written in simplest form. Which fraction should Will choose? 1/8, 3/89, 9/18, 6/10?
*January 13, 2015*

**english**

In the following sentence identify the appositive or appositive phrase and the noun or pronoun renamed by the appositive. Mr. Murray, the Scoutmaster, likes to hike. Appositive: Noun or pronoun renamed:
*January 12, 2015*

**math**

what is 8/100, 3/5, 7/10 least to greatest
*January 12, 2015*

**Geometry**

The sides of a triangle have lengths of 9, 11, and 16 units. What is the perimeter of a similar triangle with its longest side 24 units in length?
*January 8, 2015*

**Math**

Ava, Keirra, and Victoria ate exactly 3/4 of their candy bars. Ava ate 3 pieces, Kierra ate 6 pieces and Victoria ate 9 pieces. How is this possible?
*January 7, 2015*

**math**

Tyler is thinking of a number that is divisible by 2 and 3. By which of the following numbers must Tyler's number also be divisible? 6? 8? 9? 12?
*January 6, 2015*

**math**

I am a number between 60 and a 100. My ones digit is 2 less than my tens digit. I am a prime number. What am I? Explain.
*December 9, 2014*

**math**

The factors of a number include 2, 3, 4, 6, 8, 12, 16, 32, and 48. Which could be the number?
*December 9, 2014*

**math**

Manny makes dinner using 1 box of pasta and 1 jar of sauce. If pasta is sold in pckages of 6 boxes and sauce is sold in packages of 3 jars, what is the least number of dinners that Manny can make without any supplies left over?
*December 9, 2014*

**Child Development**

What kind of teacher are you to say my answers are laughable?
*December 8, 2014*

**Child Development **

Please Check my answers 1. A type of communication that isn't only about the present and that promotes higher level thinking such as planning and reminiscing is called A. child-child conversation. B. chanting. C. early production. D. decontextualized talk. ANSWER: A 2. ...
*December 8, 2014*

**Child Development**

I corrected the other ones that were wrong can you please check them? Thank you:) 2) B 4) D 8) A 9) C 10) A 11) D
*December 4, 2014*

**Child Development**

Can you check these? 1a) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. ￼￼￼￼ B. time sampling. C. event sampling. D. checklist. ANSWER : B 2a) Which of the following can...
*December 4, 2014*

**Child Development**

2) C 4) D 8) A 9) C 10) A 11) D
*December 4, 2014*

**Child Development**

10) A?
*December 4, 2014*

**Child Development**

1) B 2) D 3) A 4) B 5) A 6) C 7) B 8) B 9) A 10) C 11) A 12) B
*December 4, 2014*

**Child Development**

Possibly
*December 4, 2014*

**Child Development **

1) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. ￼B. time sampling. C. event sampling. D. checklist. 2) One way a teacher can help a child stand up for her rights is A. making other ...
*December 4, 2014*

**Chemistry**

A 100.0 mL sample of a 0.200 molar aqueous solution of K2CrO4 was added to 100.0 mL of a 0.100 molar aqueous solution of BaCl2. The mixture was stirred and the precipitate was collected, dried carefully, and weighed. How many grams of precipitate should be obtained? The ...
*December 1, 2014*

**Calc**

Three students have ordered a 14 inch diameter pizza. They slice it with 2 parallel cuts, giving them 3 pieces with equal area. The two cuts are equidistant from the center of the pizza. Find the horizontal distance between one cut and the center of the pizza. I figured the ...
*November 23, 2014*

**chem**

How many mL of a 0.123 M aqueous solution of aluminum bromide, AlBr3, must be taken to obtain 7.77 grams of the salt?
*November 18, 2014*

**college algebra**

Suppose that the Russian population is declining by 0.48% each year, and continues to decline at this rate every year. a.) what is the overall 'growth' factor (really a decline factor) for 40 years of population decline? As a percentage of the current population, what ...
*November 17, 2014*

**math- bc calc**

a building is 36 ft tall. A pulley is attached to the top of the building. A rope is looped through the pulley. One end of the rope is attached to the lantern that hangs vertically parallel to the side of the building. The rope passes up vertically from the lantern, through ...
*October 29, 2014*

**math**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the student’s checking ...
*October 23, 2014*

**Salford **

How to prepare 500ml of 7% Question 6 You need to make 500mls of a 7% bovine serum albumin solution. What mass, in grams, do you need to add? Perform the calculation then type in the correct answer to 1dp. Do not add units or additional spaces. 10 points
*October 19, 2014*

**Physical Science**

A box has a mass of 90 kg If the box is accelerating upward at 1.0m/s2, what is the tension of the cable?
*October 14, 2014*

**com 200**

All of the following are true of what typically occurs when first meeting someone EXCEPT:
*October 7, 2014*

**Physics**

A plane with a velocity of 111. 9 meters per second at a maximum rate of 6.8 m/s^2 the plane touches the runaway what's the minimum time before it can come to rest? A=6.8m/s^2 V=111.9m/s t=?
*September 28, 2014*

**Math Homework**

183.79
*September 28, 2014*

**Chemistry**

If you dilute 14.0mL of the stock solution to a final volume of 0.350L , what will be the concentration of the diluted solution? Before it, there was a question: How many milliliters of a stock solution of 5.60 M HNO3 would you have to use to prepare 0.190L of 0.450 M HNO3? ...
*September 27, 2014*

**Chemistry**

A professor orders 250 mL of house coffee at precisely 95°C. She then adds enough milk at 10°C to drop the temperature of the coffee to exactly 90° C. Calculate the amount of milk (in mL) the professor must add to reach this temperature. Assume that the coffee and ...
*September 23, 2014*

**physics**

A motorcycle daredevil is attempting to jump across as many buses as possible (see the drawing). The takeoff ramp makes an angle θ = 16.8° above the horizontal, and the landing ramp is identical to the takeoff ramp. The buses are parked side by side, and each bus is 2...
*September 21, 2014*