Saturday

December 3, 2016
Total # Posts: 2,546

**Chemistry**

H3O conc will be 0.0045M because HNO3 is a strong acid

*April 24, 2016*

**chemistry**

I posted a question several days ago: The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO−4 and the conjugate base is HPO2−4 . You want...

*April 24, 2016*

**chemistry**

Thank you, i figured out where I made the error.

*April 23, 2016*

**chemistry**

Hi, I am trying to find the pH of a buffer I created and then added NaOH to. This is my data: total volume of solution 34.2 mL [NaOH] before reaction 6.0 [HOAc] before reaction .8 M [OAc-] before reaction .4 M [HOAc] after reaction 0 M [OAc-] after reaction 5.2 M So, how would...

*April 23, 2016*

**chemistry**

Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Why would the delta s of the rxn be less than zero? thanks.

*April 22, 2016*

**Chemistry**

thank you

*April 22, 2016*

**Pre Algebra**

Anonymous you are wrong...I used Kelsey's answers and got 100%

*April 20, 2016*

**Chemistry**

In a student's experiment, when 40 mL of 6% (w/w) hydrogen peroxide solution was reacted with 10 mL 0.5 M FeCl3 solution, a ΔrH of -3,382 J was calculated. Calculate ΔH for this reaction in kJ mol-1. Give your answer to 2 decimal places, do not include the units ...

*April 19, 2016*

**Biology , AP Biology**

which of the following are autotrophs ? A. plants , some protists and some bacteria B. plants C. plants and some bacteria D. plants and some protists

*April 16, 2016*

**calculus**

A 5.5 foot tall woman walks at 6ft/s torward a street light that is 16.5 ft above the ground. what is the rate of change of the length of her shadow when she is 14ft from the street light? At what rate is the tip of her shadow moving? How do I get the equation for this and how...

*April 14, 2016*

**physics**

If you launch a marble out of a launcher on a table with a given angle, and you know that range( distance it travelled) and time travelled ( if needed). The only force acting upon is gravity. How would you find the initial speed or velocity of the launcher? Is there a formula?

*April 12, 2016*

**Math**

Find how many numbers bigger than 2,999 and less than 8,999 can be formed from the odd digits, if no digits can be repeated.

*April 11, 2016*

**Chemistry**

Nitric oxide is formed and the equation is N2 + O2 <--> 2NO Calculate the equilibrium constant now?

*April 4, 2016*

**College Algebra**

3100 is correct, the typo is 2900. Thank you for helping.

*March 31, 2016*

**College Algebra**

Write a sentence explaining the meaning of the slope and y-intercept for the given linear relation. According to the Statistical Abstract of the United States, the number of crimes, C, reported since 1998 is given by the equation: C=31000-29t where t is in years. A. What is ...

*March 31, 2016*

**math**

Weights of women are normally distributed with mean 143 pounds and standard deviation 29 pounds. If 36 women are randomly selected, what is the probability that their mean weight is between 120 and 160 pounds? Round your answer to two decimal places.

*March 31, 2016*

**math**

Adult IQ scores are normally distributed with mean 100 and standard deviation 15. Find the IQ score that separates the adults with the highest 3% of IQ scores from the rest of the adults. Round your answer to the nearest whole number.

*March 31, 2016*

**Mathematics**

12, 6, 6 cm

*March 30, 2016*

**Mathematics**

About what much? Please clarify.

*March 30, 2016*

**Mathematics**

All the surfaces of the lantern will be made of paper. What is the least amount of paper needed to make the lantern?

*March 30, 2016*

**us history**

Thank you!

*March 29, 2016*

**us history**

Which of these Transcendentalist ideas had the most direct impact on the civil rights movement of the 20th century? (6 points) A. God and nature are one and the same thing. B. People should peacefully protest unjust laws. C. Self-reflection is the most direct way ...

*March 29, 2016*

**us history**

Thank you Ms. Sue, Jamie, and James :)

*March 29, 2016*

**us history**

Jamie, I am not sure if B would be right. I think it's a good choice.

*March 29, 2016*

**us history**

What was the result of the Seneca Falls Convention in 1848? (6 points) A. Paulina Davis' shocking speech B. The Declaration of Sentiments C. the push for anti-slavery legislation D. the creation of the National Woman Suffrage Association I THINK IT IS D. AM I ...

*March 29, 2016*

**us history**

Thank you James :)

*March 29, 2016*

**us history**

Which of the following best describes the contributions of Dorothea Dix? Dorothea Dix helped found the first homeless shelter for poverty stricken families in the late 1800s. Dorothea Dix educated people about mental illness and the possibility of recovery for most ...

*March 29, 2016*

**us history**

Thank you James and Ms. Sue :)

*March 29, 2016*

**us history**

I think it is D because conversion means changing from one belief or religion and I do not think the other answers indicate that.

*March 29, 2016*

**us history**

I will not go by anybody who is under anonymous. I rather get more professional help with Ms. Sue or another teacher. Thanks for trying tho.

*March 29, 2016*

**us history**

The idea of "conversion" is best explained as which of the following? A. the process of cultural change brought about by immigration B. the process of changing the frontier into settled communities C. the process of spreading United States territory across ...

*March 29, 2016*

**us history**

Thank you. Your the best!

*March 29, 2016*

**us history**

I do not need your help I need help from Ms. Sue or another qualified teacher. Thank you.

*March 29, 2016*

**us history**

What was the main effect of the Civil War on the women's movement? A. The women's movement shifted their focus to helping widows of the Civil War. B. The movement was put on hold while women focused on anti-slavery reform and the war effort. C. The movement was ...

*March 29, 2016*

**Algebra**

An investor invested a total of $1900 in two mutual funds. One fund earned a 6% profit while the other earned a 2% profit. If the investor's total profit was $94, how much was invested in each mutual fund?

*March 25, 2016*

**math**

A metal worker has a metal alloy that 15% copper and another one is 70% copper. how many kilograms of each alloy should the metalworker combine to make 120kg of a 48% copper alloy?

*March 25, 2016*

**math**

A metal worker has a metal alloy that 30% copper and another one is 55% copper. how many kilograms of each alloy should the metalworker combine to make 50kg of a 50% copper alloy?

*March 25, 2016*

**Linear Algebra**

Diagonalize the matrix A = [1,1;-2,4] using a similarity transformation. Give the transformation matrices such that (C^−1)AC = D, where D is a diagonal matrix. (D, C) = ?

*March 23, 2016*

**Math**

Write a function that represents the situation. Find the balance A in the account after the given time period t. $2000 deposit that earns 5% annual interest compounded quarterly; 5 years A function is A= The balance of the account after 5 years is $_

*March 22, 2016*

**Linear Algebra**

Diagonalize the matrix A = [1,1;-2,4] using a similarity transformation. Give the transformation matrices such that (C^−1)AC = D, where D is a diagonal matrix. (D, C) = ?

*March 21, 2016*

**Linear Algebra**

Transform the matrix A=[5,−3;1,1], into a matrix B using the similarity transformation (C^−1)AC, with matrix C=[3,1;1,1]. B=(C^−1)AC = ?

*March 21, 2016*

**can someone help and explain plz**

what story is it ?

*March 20, 2016*

**Math**

which shape has 5 faces 5 vertices and 8 edges? triangular Pyramid** Rectangular pyramid Pentagonal pyramid

*March 17, 2016*

**Language Arts**

No not really, its more of many opinions that seem like facts would C, or D be better

*March 15, 2016*

**Language Arts**

Excerpt from “I Am a Native of North America” by Chief Dan George Man must love fully or he will become the lowest of the animals. It is the power to love that makes him the greatest of them all . . . for he alone of all animals is capable of love. Love is something ...

*March 15, 2016*

**Social Studies**

How did improvements in transportation, communication, farming, and manufacturing affect the economy of the North? Break down your answer by providing an example of advancement in each of the four areas. Then discuss how that improvement led to changes in the North’s ...

*March 15, 2016*

**Physics**

A 313 μF defibrillator capacitor is charged to 4.94×103 V. When fired through a patients chest, it loses 95 % of its charge in 40 ms. What is the resistance of the patients chest?

*March 14, 2016*

**Language Art's**

Ms. Sue, what's wrong if the person has spelling errors.. They just need help

*March 7, 2016*

**english, check please :)**

Thank you, Reed.

*March 7, 2016*

**english, check please :)**

Sarcastic?

*March 7, 2016*

**english, check please :)**

Read this excerpt from a speech on women's rights delivered by Elizabeth Cady Stanton on July 19, 1848: We do not propose to petition the legislature to make our husbands just, generous, and courteous, to seat every man at the head of a cradle, and to clothe every woman in...

*March 7, 2016*

**Physics**

a box of mass 7 kg is pulled up a frictionless 30 degree incline by a force of 381 N which acts parallel to the incline surface. the box has an initial speed of 5m/s and is pulled 9m. what is the speed of the box at the end of the 9m.

*March 3, 2016*

**precalculus**

a plane is heading 60 degrees east of south at 180 km/hr. a 50 km/hr wind blows in the direction of 25 degrees west of south. find the resultant velocity and bearing.

*March 2, 2016*

**precalulus**

a ship travels 60 miles due east, then adjusts its course northward. after travelling 80 miles in the new direction, the ship is 139 miles from its point of departure. calculate the ship's bearing.

*March 1, 2016*

**math**

i meant 17 for the answer, not 8

*March 1, 2016*

**math**

first do g(0): 3-(0)2 = 3 then do f(3) since 3 was the answer to g(0): 6(3)-1 = 8

*March 1, 2016*

**Math**

The bottom of a shopping bag measures 8 inches by 10 inches. The bag has a height of 12 inches. How much paper is needed to make the bag?

*February 29, 2016*

**math**

Julia measured the high temperature in her town for one week. Using the chart below, find the mean absolute deviation for the high temperatures. Be sure to show your work for finding: graph:sunday:50 monday:56 tuesday:52 wednesday:46 thursday:48 friday:42 saturday:38

*February 27, 2016*

**math**

Thirteen bowlers were asked what their score was on their last game. The scores are shown below. 190, 150, 154, 194, 182, 190, 170, 151, 190, 170, 178, 161, 180 Find the range of the bowlers’ scores.

*February 27, 2016*

**Math**

imgurcom/TDXvnSw

*February 27, 2016*

**Math**

The line plot below represents the number of letters written to overseas pen pals by the students at Waverly Middle School. Each x represents 10 students. How many students wrote more than 6 and fewer than 20 letters?

*February 27, 2016*

**REPOSTHealth PLEASE CHECK ANSWERS**

1, 3, 4, 5, 6, and 7 are wrong. 2 is B 8 is B 9 is B 10 is C

*February 26, 2016*

**Science**

Maybe you should have learned it before you took the quiz.

*February 22, 2016*

**math**

Are all relations equations? Is there any instances where a relation is not a relation

*February 22, 2016*

**Algebra**

A projectile which is fired from the ground with a velocity of 960 ft/sec, at an angle of 30° above the ground, has a height at time t of h(t)=480t–16t2. Find the time when it hits the ground again.

*February 21, 2016*

**CHEMISTRY PLEASE HELP APPRECIATE IT LOTS!**

Thankyou thankyou so much. Making it harder than it should be.

*February 18, 2016*

**CHEMISTRY PLEASE HELP APPRECIATE IT LOTS!**

7.) How many moles of fluroine are required to react with 12 g of sodium iodide? I already balanced it but am confused to go from here F2 + 2 NAi ---- 2 NaF + I2 12 g NaI + 2 mol NAI/149.89 gNAi * 1 mol NAF/1 mol NAi * 1 mol F2 / 2 mol NaF 1.) how many grams of magnesium are ...

*February 18, 2016*

**chem**

If 15.22 g of mercury (II) oxide decompose, how many moles of oxygen can be produced?

*February 18, 2016*

**Geography**

1-B 2-D 3-A,B,C

*February 10, 2016*

**Linear Algebra**

True/False question Suppose that A is a 2 x 3 matrix such that A[1, 1, 1]^t = [2, 3]^t = A[2, 3, 4]^t. Then [1, 2, 3]^t belongs to the nullspace of A. I have no idea how to start this question/what it means.

*February 6, 2016*

**science**

please help!!

*February 4, 2016*

**science**

Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens. Please help this is my last question and it truly stumped! It'd mean the world if someone could explain this to me. ...

*February 4, 2016*

**Calc II**

Find the volume of the solid generated by rotating the region of the x-y plane between the line y=6, the curve y=3sin(x)+3 for -pi/2 < (or equal to) x < (or equal to) 5pi/2 about the line y = 6.

*February 2, 2016*

**Chemistry**

how do i figure out the moles of H2? Do I convert the mL to L and then divide that by the mass of H2?

*January 31, 2016*

**Chemistry**

Calculate the mass of Mg needed to produce ~40 mL of H2. how do I do this?

*January 31, 2016*

**Algebra 1**

A contestant on a quiz show gets 50 points for every correct answer and loses 100 points for each incorrect answer. After answering 24 questions, the contestant has 300 points. How many questions has the contestant answered correctly? Incorrectly?

*January 30, 2016*

**Mathematics**

The first three terms of a geometric sequence are: T1; T2; and T3. If T2 = T1 + 4 and T3 = T2 + 9, determine the values of T1; T2 and T3

*January 30, 2016*

**Algebra 1 - 9th Grade**

A contestant on a quiz show gets 50 points for every correct answer and loses 100 points for each incorrect answer. After answering 24 questions, the contestant has 300 points. How many questions has the contestant answered correctly? Incorrectly?

*January 29, 2016*

**Science**

Kpop is real is right! These are the answers for the What Causes Climate? quick check.

*January 29, 2016*

**English**

ugh no. I'm doing it right now I'm trying to find out 😹

*January 29, 2016*

**Language Arts**

nah shes rude, people just want help and she likes to criticize students for no reason and give out their location. i think shes the worst, i hate her.

*January 28, 2016*

**Calc II**

Find the function y = y(x) which solves the initial value problem: 4sec(x)*dy/dx = e^(y+sin(x)) where y(0) = -5

*January 28, 2016*

**English**

What is the secret to reaching someone with words? Which of the poems—"Concrete Mixers," "The City Is So Big," or "Harlem Night Song"—best uses words to create a vision or an idea of the city for you? In a paragraph, state your opinion ...

*January 26, 2016*

**History**

Hebrew symbol for l: symbol for pi basically Kanarda symbol for o: basically a curved w with a tail on the left Hindi : voiceless breath

*January 25, 2016*

**Algebra**

The quadratic function f is negative only on the open interval (−2, 1 4 ) and its graph passes through the point (−1, −5). Determine the coefficients of f and sketch its graph.

*January 25, 2016*

**Algebra**

The quadratic function f is negative only on the open interval (−2, 1 4 ) and its graph passes through the point (−1, −5). Determine the coefficients of f and sketch its graph.

*January 25, 2016*

**Calc II**

Write a simpler expression for z = ln(4x^4 + 11x^3) + ln(1/5x^3) which does not involve any powers on x which are bigger than 1. I have no idea how to simplify the first natural log since it has two x values with exponents.

*January 24, 2016*

**tourism, maths literacy, business studies and econ**

accounting, econ

*January 24, 2016*

**Spanish**

its A

*January 24, 2016*

**Financial Math**

Emily borrows 20,000 for 8 years at a nominal discount rate of 6% compounded quarterly. Calculate the amount of discount that Emily will pay.

*January 24, 2016*

**Financial Math**

You have $100 and could use it to buy 80 songs from itunes. Instead, you invest your $100 at an annual effective interest rate of 11.3% for 4 years. The price of songs on itunes is subject to an annual effective rate of inflation of r%. At the end of 4 years, you can buy 101 ...

*January 24, 2016*

**Algebra 2 pt 2**

I need help making a table 3. One of the fireworks is launched from the top of a 70ft tall building with an initial upward velocity of 150 ft/sec. a. What is the equation for this situation? g=-32ft/s^2 b. When will the firework land if it does not explode? 9.28 seconds c. ...

*January 22, 2016*

**Maths lit.Economics.Business.Accounting.English.Afrikaans.**

yeeeeessssssss

*January 21, 2016*

**College Calc**

A train travels from city A to city B and then to city C. The distance from A to B is 220 miles and the distance from B to C is 87.5 miles. The average speed from A to B was 55 miles per hour, and the average speed from B to C was 35 mph. What was the average speed from A to C...

*January 21, 2016*

**math**

write a translation rule that maps point D (7, -3) onto point D'(2,5)

*January 20, 2016*

**Math**

Thomas needs to cut a piece of wood for a model airplane he is builing. He has four peices of wood: 5 ft, 4 ft, 6 ft, 3 ft long. If the length of wood he needs to cut √11 ft long, which peice of wood should be cut to have the least amount of unused wood.

*January 20, 2016*

**Equations and Inequalities Unit Test**

Pfft just use Mathway

*January 20, 2016*

**Honors Algebra 2**

Write an equation in standard form of the parabola that has the characteristics below. Vertex at (1,-8); passing through the point (3,12) So I started the problem and now I'm stuck as of what to do next. Y=a(x-h)+k 12=a(3-1)^2-8 12=a(2)^2-8 12=4a-8 4=4a 1=a

*January 19, 2016*

**Social studies**

B, sorry

*January 19, 2016*