Thursday

September 18, 2014

September 18, 2014

Total # Posts: 310

**6th grade math**

Hi I'm a parent and I'm trying my best to help my son but I need help. The problem is... Find two positive decimals a and b that make the following statement true. Then find two positive decimals a and b that make the statement false. If a < 1 and b < 1, then a ...
*September 17, 2014*

**Organic chem Extraction of caffeine from tea**

What is the name used for the mixture of the upper and lower layers that did not completely separate when you allowed the mixture to settle? What type of compound could cause the layers not to separate cleanly? If you obtained a poor separation of your phases, suggest two ...
*September 16, 2014*

**Physics Help Urgent Please!!!**

A crane is used to lift air conditioning units to the top of a 5-story building. Each story is 3.5 m high. The crane accelerates the units while lifting the units past the first story and then lifts them at a constant velocity past the second through fourth stories. it hen ...
*September 15, 2014*

**Physics Help**

An industrial die machine is used to stamp out holes in pieces of sheet aluminum. the die strikes the surface of the street of metal at a speed of 10 m/s, passes through the 0.635 cm thick sheet, reverses its direction, and is again moving at 10 m/s as it passes the top ...
*September 14, 2014*

**Physics Need Help**

The pile driver struck the piling with a speed of 20 m/s. At what height did the pile driver hammer have to be lifted for it to fall freely and attain that speed before striking the piling? Show steps please!!!
*September 14, 2014*

**Math**

A dress is on sale for a 15% discount, meaning 85% of the price remains. If the sale price of the dress is $51, then the original price of the dress was $.
*June 30, 2014*

**Sciene**

Is Meiosis actually Mitosis happening twice? My answer- Yes because they are both a cell division process.
*May 10, 2014*

**statistics**

A quality supervisor for a factory that makes cell phone cases examines a sample of 46 cases. She finds that 8 cases are the wrong size. Which is the best prediction of the number of cases that will be the wrong size in a shipment of 3,000? A.)410 B.)475 C.)506 D.)522
*May 7, 2014*

**Math**

The regular pentagon have a perimeter of 18.8 units. What is the value of X?
*April 12, 2014*

**spanish**

Using the subject “usted” and the verb in the imperative, tell your instructor three things she or he must do. Then tell your instructor two things she or he must not do. You will be graded on accuracy and pronunciation. Provide your sentences in Spanish.
*April 7, 2014*

**spanish**

Usted debe corregir las pruebas. Usted tiene que darme más tiempo. Usted debe ir con nosotros. Usted no debe mascar chicle. Usted no tiene porqué hacerlo, que lo hagan ellos.
*April 7, 2014*

**Calculus**

The amount of carbon-14 still present in a sample after t years is given by the function where C0 is the initial amount. Estimate the age of a sample of wood discovered by an archeologist if the carbon level in the sample is only 18% of its original carbon-14 level.
*March 26, 2014*

**Calculus**

If 40 milligrams of strontium-90 radioactively decays to 12 milligrams in 30 years, find its half-life (the number of years it takes until half of it remains). Use the formula A = p ⋅ e−kt, where p is the amount and A the (smaller) final amount.
*March 26, 2014*

**english**

So, the correct answer is A
*March 21, 2014*

**english**

Which one of the following is a correct example of the singular possessive case? A. king's rights B. audiences' reaction C. women's club D. who's job I think it's C.
*March 21, 2014*

**Statistics **

1. A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows: Eating Habits Scores Baseball Players Football Players Basketball Players 34 27 35 18 28 ...
*March 20, 2014*

**Calculus Help Please!!! **

Find an equation of the tangent line to the curve at the given point. ((pi/6),(2 square root of (3)/3)) y = sec (x)
*March 20, 2014*

**I got the answer **

Thank you!
*March 16, 2014*

**Calculus Help**

Use logarithmic differentiation to find the derivative of the function. y = (tan x)^(7/x)
*March 16, 2014*

**Calculus Help Damon**

Use implicit diff. to find dy/dx of each of the following. This is the question
*March 13, 2014*

**Calculus Help **

In the following x,y and (a) are all variables. Show steps please! Thank you! 1) y^2 = x^2+a^2 2) y^2+ay = x^2+ax+a^2
*March 13, 2014*

**Math**

A 6ft. person casts a 4ft. shadow. Next to the person, a lamppost casts a 30ft. shadow. How tall is the lamppost?
*March 6, 2014*

**English**

Read the conversation at a peer review for Ben’s short story. “It seems your central character has a really cool power: being able to hear what others are thinking,” Tom said. “Actually, I think it was more of a jinx,” replied Ben. “Being able to ...
*February 9, 2014*

**physics**

Two buses leave downtown one is headed southwest the other is headed northeast. Do they have the same velocity? Why or why not?
*February 7, 2014*

**math**

how do I arrange these fraction or mixed numbers in order from smallest to largest 1)5/6,5/7,-3/4,2/3,9/11,-3/7 and 2)2 1/2, -7/2,-2 1/3,2 4/5,2 3/8.
*December 22, 2013*

**Math**

A group of students went.to their favorite restaurant after the football game one friday night
*December 8, 2013*

**civics**

In modern society, what do we mean when we refer to the dividion of labor? A} the specializatoon of jobs in tthe medical field B}splitting work equally between two people C{all the jobs peopkle do are connected to other jobs D} the ways joconstruction jobs are organized I ...
*November 28, 2013*

**us history **

I am second guessing myself on these Any help is appreciated which of the following is true with regards to the navigation acts by the eighteenth century? A} the navigation act of 1696 abolished the american customs service b the acts replaced the colomial admirality courts c ...
*November 26, 2013*

**us histery**

I am unsure of some of my answers. I have tried looking, I am lost.. I would appreciate any help.. Thank you in advance. I am double checking which of the following statements is true regarding the korea war A} stalin approved the north korean attack in advance b stalin was ...
*November 26, 2013*

**history**

at the constitutional convention in pj hiladelphia, madison drafted the plan presented by virginia govenor randolph, and william patterson of ____ presented a plan that was similiar to the articles of confederation. Thank you in adavance, I was stuck on 3
*November 18, 2013*

**history**

sir george grenville, king georges chancellor of the exchequer, enacted the revenue act of 1764 to raise rebenue for maintenance for the british army in america. In the colonies it was commonly known as the ___ act? Thank you in advance.. I have a few I am compketely stuck on
*November 18, 2013*

**american history**

which utopian community was founded and established in new york state
*November 18, 2013*

**8th Grade Math**

How do I enter this with two decimal places and not a percent? 0.18811922 Is it 0.19?
*October 27, 2013*

**physics**

A ball is thrown horizontally from the top of a building 32.3 m high. The ball strikes the ground at a point 110 m from the base of the building. The acceleration of gravity is 9.8 m/s 2 . Find the time the ball is in motion. Answer in units of s
*October 14, 2013*

**Math**

You spend 1/2 of your allowance on Monday. On Tuesday, you spend 1/2 of the amount you have left. On Wednesday, you spend half of what remains. What fraction of your allowance do you have left?
*September 25, 2013*

**Intermediate Algebra**

add or subtract the following polynomials as indicated (5.9x to the 3rd power+3.4x to the 2nd power - 7)-92.9x to the 3rd power -9.6x to the 2nd power +3)
*September 7, 2013*

**Intermediate Algebra**

for the polynomial function h(x)=2x to the 4th power-x to the 3rd power+2x to the 2nd power -4x-3 evaluate h(3)
*September 7, 2013*

**Intermediate Algebra**

name the type of polynomial and give its degree for 7x to the 3rd power + 6x to the 2nd power -2=
*September 7, 2013*

**Business**

Essie and Ruby sell Blu-Ray players. Last month Essie sold 35 less Blu-Ray players than Ruby. Together they sold 145. How many Blu-Ray players did Essie sell?
*August 9, 2013*

**Math**

John currently has a square garden. He wants to redesign his garden and make it into a rectangle with a length that is 3 feet shorter than twice its width. He decides that the perimeter should be 60 feet. Determine the dimensions, in feet, of his new garden. Please show work.
*July 30, 2013*

**Vegetarian**

why do vegetarians need to be careful about their protein intake?
*June 23, 2013*

**Nutrition-Help Please**

Answer to second part of the question: Height, weight, age and gender are the primary factors that most directly affect basal metabolism by affecting LBM.
*June 21, 2013*

**Nutrition-Help Please**

What does LBM (muscle mass) have to do with BMR? Identify the four primary factors that most directly affect basal metabolism by affecting LBM.
*June 21, 2013*

**Math**

5/36,5/45
*April 28, 2013*

**Math **

Inductive reasoning please determine the next three numbers in patern 15,5,5/3, 5/9, , , ,
*April 28, 2013*

**chemistry**

Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted. True or False?
*April 15, 2013*

**chemistry**

Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted. True or False?
*April 15, 2013*

**chemistry**

Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted. True or False?
*April 15, 2013*

**chemistry**

Given the chemcal equation:2 Ca+O2>2 CaO,if 2 moles of CaO are formed in this reaction,then 2 moles of O2 must have reacted. True or False?
*April 15, 2013*

**Statistics**

The eggs of a species of bird have an average diameter of 23 mm and an SD of 0.45 mm. The weights of the chicks that hatch from these eggs have an average of 6 grams and an SD of 0.5 grams. The correlation between the two variables is 0.75 and the scatter diagram is roughly ...
*March 15, 2013*

**Math**

Find the derivative of the given function. f(x)=(ãx+9x)(x^3/2-x) f '(x) = ?? Evaluate f '(x) at the value x = 4. f '(4) = ??
*March 7, 2013*

**math**

Find the slope m and an equation of the tangent line to the graph of the function f at the specified point. F(X)=x^2/x+6;(3,1) m = ?? y = ??
*March 7, 2013*

**math **

f(x)=(ãx+9x)(x^3/2-x) Evaluate f '(x) at the value x = 4. f '(4) = ??
*March 7, 2013*

**math**

Find the derivative of the function f by using the rules of differentiation. f(x)= 4x^4/3-2/3x^3/2+7x^2-3x+1
*March 4, 2013*

**math**

Find the derivative of the function f by using the rules of differentiation. f(x)=(9x^3+3x^2+10x-6)/(x)
*March 4, 2013*

**math**

thank you soo much I understand it now!! :)
*March 4, 2013*

**math**

Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x)=7x-5x^2 at (-2,-34) m = ?? y = ?? .
*March 4, 2013*

**math**

Let f be defined as follows. y=f(x)=x^2-12x (a) Find the average rate of change of y with respect to x in the following intervals. from x = 5 to x = 6 ?? from x = 5 to x = 5.5 ?? from x = 5 to x = 5.1 ?? (b) Find the (instantaneous) rate of change of y at x = 5. ??
*March 4, 2013*

**Math Please Help!!**

that wasnt right
*March 1, 2013*

**Math Please Help!!**

Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x)=-10/3x^2+6x+6; (-1, -10/3) slope ?? tangent line y = ?
*March 1, 2013*

**math**

Find the derivative of the function f by using the rules of differentiation. f(x)=7x^4/3-2/3x^3/2+2x^2-5x+1 f '(x) = ??
*March 1, 2013*

**math**

he was wrong
*March 1, 2013*

**math**

Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x)=-10/3x^2+6x+6; (-1, -10/3) slope ?? tangent line y = ?
*March 1, 2013*

**Excel formula help**

Formula to multiply the number in cell 4k times standard deviation of the numbers in cell z2 through z10 I don't understand cell z2 through z10 I have never had excel (4kxz2xz10) Please write this correctly
*January 27, 2013*

**Excel help**

How would I write a formula to multiply the number in cell k4 times the standard deviation of the numbers in cell z2 through z10
*January 27, 2013*

**Excel help please**

I don't know how to do any excel
*January 27, 2013*

**Excel help please**

How would I write a formula to multiply the number in cell z675 times the number in cell a1
*January 27, 2013*

**Computers excel**

How would you write a formula to divide the quantity of cell c1 plus c 8 by the number in a 98
*January 25, 2013*

**Excel**

How would you write a formula to divide the number in the cell v45 by the number in cell b78
*January 25, 2013*

**Excel computers**

How would you write a formula to multiply the number in cell k4 times the standard deviation of the number in cell z2 through z10
*January 25, 2013*

**operating system**

How would you write a formula to multiply the number in a cell z675 times the number in cell a 1
*January 25, 2013*

**Biology**

A blue eyed man whose parents were brown eyed marries a brown eyed woman whose father was brown eyed whose mother was blue eyed they have one female child who is blue eyed make a pedigree chart based on the information above.
*January 18, 2013*

**Math-Calculus**

Volume using disk method: x=.000574y^(2)-.439y+185 Interval: (0,500)
*December 6, 2012*

**math**

A jet is flying through a wind that is blowing with a speed of 45 mi/h in the direction N 30° E (see the figure). The jet has a speed of 775 mi/h relative to the air, and the pilot heads the jet in the direction N 45° E.
*December 2, 2012*

**science**

can you please tell me which catergory these belong in chemical or physical property? 1. arrangement of particles have changed 2. absorb or release. energy(endothermic/exothermic reactions) 3. change in appearance only. 4. cant be undone. 5. size and shape may change
*November 28, 2012*

**history **

most republicans in the late 1800 were protestants who their party as the defender of traditional American values true or false?
*November 12, 2012*

**CHEMISTRY**

Okay, I think i understand the second question. moles=MxV so... moles=(24.5ml)(0.10M NaOH) = 2.45 moles ??
*October 22, 2012*

**CHEMISTRY**

Not for homework, just practice problems I'm having trouble with. Knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralize 30.0 mL of the 0.10 M NaOH solution? if 24.5 mL of the 0.10 M NaOH solution is required to ...
*October 22, 2012*

**Subjects and Prepositions. **

What is the compound or simple subject and compound or simple predicate in each sentence? draw t the line between the complete subject and complete predicate in each sentence. 1. People of all ages and abilities love sports. 2. More than 2 million athletes, representing 180 ...
*October 15, 2012*

**Physics **

You and your friend throw balloons filled with water from the roof of a several story apartment house You simply drop a balloon from rest. A second balloon is thrown downward by your friend 2.1seconds later with an initial speed of 41.6m/seconds. they hit the ground at the ...
*September 16, 2012*

**statistics**

IQ scores are normally distributed with a mean of 105 and a standard deviation of 18. Assume that many samples of size n are taken form a large population of people and the mean IQ score is computed for each sample. If the sample size is n=64, find the mean and standard ...
*September 13, 2012*

**calculus help**

consider lim -->0^+ 1)sin(4x)/sin(3x) find the limit using a table of values 2)based on your answer what should the limit equal?
*September 12, 2012*

**Cal-Help Please**

Evaluate the limit, if it exists. lim , 3 − square root(x) /(9x − x^2) x¨9
*September 8, 2012*

**Science conversions**

How do I convert 2.3 J/proton to J/mol?
*September 7, 2012*

**CHEMISTRY**

What is the energy of a photon with a frequency of 3.5 X 10ˆ15 sˆ-1 in J/photon? In J/mol?
*September 7, 2012*

**CHEMISTRY**

What is the wavelength in meters for light having a frequency of 2.40 X 10ˆ12 sˆ-1? What portion of the electromagnetic spectrum does this belong?
*September 7, 2012*

**Computer Science**

After reviewing an algorithm that allowed a user to enter 3 different numerical values, if statements were used to find the smallest value. Smallest of five: The assignment is to determine which method (either nested conditions, sequential compound conditions, nested and ...
*August 24, 2012*

**6th grade math**

Jo made 7 pounds of cookies.She gave 3.25 pounds to her friends and 0.7 pounds to each of her three brothers.How many pounds did she have left?
*August 8, 2012*

**science**

Making inferences will help the scientists understand their discoveries more easily.It also help the scientists analyze and talk about what what you read...
*June 29, 2012*

**Algebra**

(i^2-64)^2
*April 24, 2012*

**pre-calc HELP PLEASE**

solve using identities for all angles (dont use multiple angle method)show work please cuz i am so confused. 2sin2x-3sinx=0
*April 24, 2012*

**pre-calc**

cosx= -8/17, 180<x<270 find sin x/2= cos x/2= tan x/2=
*April 21, 2012*

**Pre-Calculus**

Evaluate the expression under the given conditions.? show work please! sin(A-B); tan A=12/5, A in quadrant 3, sinB=-3sqrt(10)/10, B in quadrant 4.
*April 21, 2012*

**Chemistry**

calculate the amount of heat energy in joules to condense 125g of steam at 100 degrees celcius and cool to the liquid to 15 degrees celcius?
*April 20, 2012*

**Human Resources In Health Care**

How do human resource laws or health care regulations affect performance appraisals? What are the legal implications a manager must consider when conducting performance appraisals?
*April 18, 2012*

**math**

find the interest on $1,200 at 8% for 6 months. explain each step.
*April 17, 2012*

**Business math**

As a professional photographer, Marion has seen the trend away from film cameras as customers purchase low-end digital cameras and printers in order to avoid processing fees associated with film-based cameras. She would like to offer a new service to customers by offering ...
*April 16, 2012*

**algerbra 2**

how do i find the center for the hyperbola x2over16-y2over25=1
*April 13, 2012*

**chemistry**

what volume of hydrogen sulfide is produced by reaction of 0.5 mole of sodium sulfide with hydrochloric acid at a temp. of 20C and a pressure of 722 mm.
*April 12, 2012*

**social studies**

whats a gift of land made and honored by the govnerment?
*April 4, 2012*