Thursday

October 8, 2015
Total # Posts: 367

**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**

Nice job
*December 10, 2012*

**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*

**Chemistry Help Please!!!**

THANK YOU SOOOOO MUCH!!!!!!
*March 26, 2012*

**Chemistry Help Please!!!**

Thank you so much!!!!
*March 26, 2012*

**Chemistry Help Please!!!**

For each of the reactions below give a balanced equation. 1)Methane (CH4) with chlorine to give chloroform (CHCL3)and hydrogen cloride. 2) Sodium Hydroxide with phosphoric acid. 3)sodium carbonate with sulfuric acid. 4) sodium sulfide with hydrochloric acid.
*March 26, 2012*

**Chemistry**

i had a question just like this so if you could explain it a little more it migth be helful for me as well. Thank you!
*March 26, 2012*

**Chemistry**

Can you explain it a little more cuz i got so confused!!!
*March 26, 2012*

**social studies**

i need help with 007689,007690,007691,007692,007693... can anyone help me??????
*March 12, 2012*

**physics**

an electric heating element is conneceted to a 110V circuit and a current of 3.2 a is flowing through the element. How much energy is used up during a period of 5 hours by the element?
*March 11, 2012*

**6th grade math**

I need help with msth the question to math question is what is M<26=
*February 1, 2012*

**math**

How many 9 inch square tiles are needed to cover a table top that is 3 feet by 3 feet?
*January 31, 2012*

**Health**

explaining how a new office would be set up
*January 16, 2012*

**Algebra**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*December 15, 2011*

**Algebra**

is that correct... Please check it
*December 15, 2011*

**Algebra**

balance after 6 years = 50000(1.0075)^72-804.45(1.0075^72 - 6)/.0075= 9198.86
*December 15, 2011*

**Algebra**

Balance owed at end of year 6 = 50000(1.0075)^72 - 804.45(1.0075^72 - 1)/.0075 = $9,198.86 Total repayment+ $67,574.13 based on $50,000 at 9% for 7 years. Is this correct? Thanks for your help
*December 15, 2011*

**Algebra**

Could you please show me all the steps. I really need to understand this. there are 3 parts to be answered. I am so confused Thank you so much..
*December 15, 2011*

**Algebra**

You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate of 9% interest that compounds ...
*December 15, 2011*

**com 172**

Review the following passage and paraphrase it in the following box. Use the reference to create an appropriate APA-formatted in-text citation. Additionally, include one direct quotation. One of the most valuable skills a student can develop is focus. Focus is the ability to ...
*November 28, 2011*

**math**

shawna reduced the size of a rectangle to a height of 2 in. what is the new width if it was originally 24 in wide and 12 in tall ? how do you solve it if the answer is 4?
*November 17, 2011*

**EED 364**

1) Observe an elementary mathematics lesson. Write an essay of 1,500-1,750 words that addresses the following issues and summarizes your observations: a) What is the importance of having standards in mathematics? How do standards improve mathematics instruction? Compare and ...
*October 28, 2011*

**physics**

A ball rolls off of a table with a speed of 2 m/s. The table is 1.2 m high. How long will it take to the ball to hit the ground?
*October 26, 2011*

**Math**

Would it be a fraction strip divided into 24?
*October 20, 2011*

**history**

its in no way Hittite because Ive taken a history test twice and that answer has came back wrong both times
*October 3, 2011*

**geometry**

finding endpoints dont quite understand it. M-LN if L coordinates are -3,-1 and M coordinates are 0,1
*September 30, 2011*

**south lewis**

when water and ice are mixed the temperature of the mixture is 0 degrees Celsius. When methyl alcohol and ice are mixed a temperature of -10 degrees is obtained. Why is there such a difference?
*September 25, 2011*

**HELP!!**

1.) 15 * 4 2/3 2.) 10 2/3 divided by 4
*September 20, 2011*

**math**

1.) 15 * 4 2/3 2.) 10 2/3 divided by 4
*September 19, 2011*

**Math**

What about #2?
*September 19, 2011*

**Math**

Math help??? 1.) 13 1/3 divided by 6 2/9 2.) 15 * 4 2/3 3.) 10 2/3 divided by 4
*September 19, 2011*

**American history**

In what state did the Nat Turner slave revolt of 1831 take place?
*August 4, 2011*

**maths**

thanks pankrasia
*August 3, 2011*

**maths**

Write the slope-intercept equation for the line that passes through (2, -4) and has slope -7/2.
*August 3, 2011*

**Intermediate Algebra**

To buy both a new car and a new house, Tina sought two loans totalling $78,825. The simple interest rate on the first loan was 0.2%, while the simple interest rate on the second loan was 5.0%. At the end of the first year, Tina paid a combined interest payment of $2817.23. ...
*July 28, 2011*

**Physical Science**

Determine the concentration of the HCl in a swimming pool?given 100ml of a standard solution of Na2CO3 of concentration 0.05mol.dm
*May 26, 2011*

**chemistry**

in 1807 the English chemist Humphrey Davy passed an electric current through molten potassium hydroxide and isolated a bright, shiny reactive substance. He claimed the discovery of a new element, which he names potassium. In those days, before the advent of modern instruments...
*May 21, 2011*

**physics**

if you have an object of mass 5.4 g and volme 2.7 cm3 would the object float in water
*May 17, 2011*

**Algebra**

If Marcy received a 7% raise and is now making $67,500 per year, what was her salary before the raise? Round your answer to the nearest dollar.
*May 10, 2011*

**Algebra**

The number of dogs taken in daily at a local animal shelter increased from 4 in October, 2009 to 10 in January, 2010. Predict the number of dogs taken in daily in May, 2010.
*May 10, 2011*

**English**

Position of Modifiers (errors in the placement of a modifier in a sentence) Answer Actually, the pineapple was a symbol of hospitality. Everything that King Midas touched turned to gold, including his food and water. The farmer butchered the pig he had raised on a table behind...
*April 28, 2011*

**English**

Word Choice and the Use of Idioms (errors in the choice of words and in the use of idiomatic expressions) Answer With all of his acne pits, in the dark his face resembled a cratered moon on a cloudy night. It was a strenuous tennis match, but after a hot shower and a cool ...
*April 28, 2011*

**English**

# Errors in the use of punctuation marks - Comma Answer Birds such as eagles, hawks, and falcons are known as raptors. Money raised by the sale of UNICEF greeting cards goes toward famine relief, health care, and education. The Dead Sea Scrolls shed new light on the Old ...
*April 28, 2011*

**English**

Errors in the use of punctuation marks - Semicolons and Colons Answer Daniel Boone was born in Pennsylvania; his parents were English Quakers. Leftover turkey can be used in turkey tetrazzini, turkey burgers, and turkey chowder. In 1819, the Baptists founded Hamilton Literary ...
*April 28, 2011*

**English**

Errors in the use of punctuation marks - Use of Quotation Marks and Terminal Punctuation Answer Several universities in the city offer the following degrees: B.A., M.A., Ph.D. Must students write a research paper and pass a written examination in order to receive an M.A.? ...
*April 28, 2011*

**social studies**

punic war
*April 25, 2011*

**Statistical reasoning in psychology**

Mouradian (2001)surveyed college students...
*April 22, 2011*

**physics**

A car initially going 30ft/sec brakes at a constant rate (constant negative acceleration) coming to a stop in 4 seconds. How far did the car travel?
*April 21, 2011*