# Valerie

Popular questions and responses by Valerie-
## Chemistry

What is the pH of a 0.50 M solution of NaNO2 if the Ka of H20x = 4.5 x 10^-4. I know that you use the Ka to find Kb and solve from there, but why?

*asked on September 26, 2012* -
## Statistics

Blossom's Flowers purchases roses for sale for Valentine's Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine's Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for

*asked on August 6, 2013* -
## Physics

In Oersted's experiment, suppose that the compass was 0.30 m from the current-carrying wire. If a magnetic field of 1/3 the Earth's magnetic field of 5 10−5 T was required to give a noticeable deflection of the compass needle, what current must the wire

*asked on March 24, 2013* -
## Geometry

On a rectangular piece of cardboard with perimeter 11 inches, three parallel and equally spaced creases are made. The cardboard is then folded along the creases to make a rectangular box with open ends. Letting x represent the distance (in inches) between

*asked on January 21, 2011* -
## physics

the speed of a cyclist reduces uniformly from 2.5 m/s to 1.0 m/s in 12 s. (a) calculate the deceleration of the cyclist. (b) calculate the distance travelled by the cyclist in this time

*asked on October 31, 2010* -
## present value

An investment pays you $20,000 at the end of this year, and $10,000 at the end of each of the four following years. What is the present value (PV) of this investment, given that the interest rate is 4% per year?

*asked on April 3, 2015* -
## English

What is one theme, or central of "Two Kinds"? Persistence is the key to success High expectations are the key to success Discovering one's own goals and desires is an important part of growing up A family cannot be happy unless the children obey and

*asked on September 8, 2017* -
## Math

Tell whether the quantity is constant or variable. 1. The price per gallon of gasoline. 2. The distance between Chicago and Boston. I need explanation for each also.... Thank you!

*asked on April 22, 2011* -
## Physics

To construct a solenoid, you wrap insulated wire uniformly around a plastic tube 12 cm in diameter and 45 cm in length. You would like a 2.0-A current to produce a 2.1-kG magnetic field inside your solenoid. What is the total length of wire you will need

*asked on March 24, 2013* -
## Chemistry

I am trying to answer my questions for thermal decomposition of malachite lab. I have moles of malachite in 1g= 0.0045 moles of Cuo produced= 0.0009 ratio of moles of Cuo produced per moles of malachite decomposed=0.0045/0.0009=5.1 the balanced euation =

*asked on September 27, 2009* -
## math

Find the center, vertices, and foci of the ellipse with equation 3x^2 + 8y^2 = 24.

*asked on September 1, 2016* -
## Language Arts Help!!

10 MS. SMITH: {glossing over his misbehavior and adopting a serious tone as she hands Jason a piece of paper} Yes, ok. So, tell me your plan for the project. Have you consulted this project list yet? You really need to quit putting this off. You're the

*asked on May 25, 2016* -
## math

Consider the sequence of steps to solve the equation: 5(x - 3) = 7x 2 Step 1 ⇒ 10(x - 3) = 7x Step 2 ⇒ 10x - 30 = 7x Step 3 ⇒ 3x - 30 = 0 Step 4 ⇒ 3x = 30 Step 5 ⇒ x = 10 Identify the property of equality which yields Step 5. I'm thinking

*asked on October 22, 2019* -
## Math Help!!

You roll a standard cube once. Find P(0) a) 7/6 b) 1 c) 1/2 d) 0

*asked on May 20, 2016* -
## Math

During a track meet Kelly throws the shotput 51 feet, 50 feet,and 58 feet. Write an expression that represents the length of her average throw in feet. Evaluate the expression.

*asked on August 27, 2015* -
## Physics

Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now.

*asked on April 14, 2013* -
## Physics

A single-turn square loop of side L is centered on the axis of a long solenoid. In addition, the plane of the square loop is perpendicular to the axis of the solenoid. The solenoid has 1490 turns per meter and a diameter of 6.00 cm, and carries a current

*asked on April 7, 2013* -
## College Algebra

Choose the end behavior of the polynomial function. f(x)= -5x^5-9x^2+6x+1. I got left end up right end down. Is this right? Thanks

*asked on January 22, 2011* -
## sign language

can someone help me with sign language please!! 1)_____ of the American Manual Alphabet hand-shapes are formed to resemble the letter they represent A)All B)some C)None 2)what are two main parts of forming signs? A) forming words with your lips and

*asked on October 18, 2016* -
## Physics

A solenoid is 3.2 m long and has 500 turns per meter. What is the cross-sectional area of this solenoid if it stores 0.32 J of energy when it carries a current of 12 A? So I used L = 2*E / I^2; and then I used A = L*l / (uo * N^2) but my answer isn't

*asked on April 14, 2013* -
## Math

Mrs. Klein made some tarts. She sold three fifths of them in the morning and one fourth the remainder in the afternoon. If she sold 200 more tarts in the morning than in the afternoon how many tarts did she make?

*asked on February 7, 2012* -
## Science

What is the goal of technology to understand the natural world to improve how devices operate to improve how people live THIS ONE to understand how systems operate What is a factor that limits a technological design a prototype a trade-off a constraint

*asked on September 19, 2017* -
## Math

Sarah flipped a pair of coins 60 times on 24 occasions, heads appeared on both coins. How is this outcome different from the expected outcome? It occurred 9 more times than expected it occurred 4 more times than expected It occurred 6 fewer times than

*asked on September 10, 2017* -
## Science

Discuss your opinion of the consequences of artificial selection and the advantages and disadvantages of using genetic information in society. Use facts from your research to support your opinion. Cite the sources for your facts. Also, discuss your answer

*asked on March 7, 2017* -
## Math Ms. Sue help me

What does it mean to say that a number is a perfect square? Give one example of a number that is a perfect square and one that is not. Can you plz help me?

*asked on November 14, 2016* -
## College Algebra

Deer Valley determined that the cost of these apples was 64 cents per pound. 1. What would be the selling price per pound for the prepackaged apples using a 30% markup based on cost? A 40% markup? A 50% markup? 2. Based on the national average for apples

*asked on December 17, 2015* -
## math

An advertisement for a steel-belted radial tire states that this tire delivers 16% better gas mileage. If the present gas mileage is 24.5 mpg, what mileage would you expect if you purchased these tires? Round your answer to the nearest tenth of a mile per

*asked on September 27, 2015* -
## Math

If each angle of a regular polygon measures 140 degrees, how many sides does it have?

*asked on March 26, 2011* -
## Math

In how many ways can 7 people line up for plane tickets?

*asked on March 26, 2011* -
## Science

This is what the chart talks about. A Melt 1 cup of butter chop an onion mix ingredients in a large bowl B Brown the meat in a frying pan boil 6 eggs bake at 350 degrees kendra was looking at recipes in a cookbook. she divided some of the steps of a recipe

*asked on October 20, 2017* -
## Mathematics

order of operation 16 divided by 4 . 2= I just did 16 divided by 4 which is 4 then multiply it by 2 which is 8 Am I right

*asked on September 16, 2017* -
## Mathematics

Can anyone check my answers please True or false 927 is divisible by 3 and 9 true 13,012 is divisible by 9 false 7,434 is divisible by 6 true 2,064 is divisible by 2,4,and8 true 96,240 is divisible by 2,3,5, and 10 true Am I right?

*asked on September 15, 2017* -
## Mathematics

Can anyone check my answers please True or false 927 is divisible by 3 and 9 true 13,012 is divisible by 9 false 7,434 is divisible by 6 false 2,064 is divisible by 2,4,and8 false 96,240 is divisible by 2,3,5, and 10 false Am I right?

*asked on September 15, 2017* -
## Mathematics

You decide you will buy a stock only if it shows an overall increase over the next 30 days. The first 10 days, it has an average daily increase of 0.30. The next 10 days it has an average daily decrease of 0.45. The last 10 days, it has an average daily

*asked on September 12, 2017* -
## Math

List three different ways to write 5^11 as the product of two powers. Explain why all three of your expressions are equal to 5^11 Need some help Please!!

*asked on June 9, 2017* -
## Science Ms. sue help

what is the function of a cell wall A) to Protect and support the cell B) to preform different functions in each cell C) to prevent water from passing through the cell D) to prevent oxygen from entering the cell. Help!!!!

*asked on November 15, 2016* -
## Math

when adding /25 and -9 which type of number is the sum? Plz help me

*asked on November 14, 2016* -
## liberal arts

A turtle is at the bottom of a 13 foot well. Each day it crawls up 5 feet, but each night it slips back 3 feet. After how many days will the turtle reach the top of the well?

*asked on November 24, 2014* -
## accounting

Swan Creek Company has 40,000 shares of cumulative preferred 2% stock, $60 par and 50,000 shares of $50 par common stock. The following amounts were distributed as dividends:year 1 30000 my answer was 18000 common stock

*asked on September 14, 2014* -
## Math

Two sides of a triangle measure 7 cm and 15 cm . Which of the following could not be the length of the third side ? A. 5 cm B. 9 cm C. 15 cm D. 22 cm I'm confused because at first I tried Pythagorean thereom and it didn't really work .

*asked on June 3, 2014* -
## Computer Science

Write a class “Program1” that has the method “allLess” (below) that receives two arrays of integers and returns true if each element in the first array is less than the element at the same index in the second array. For example, given the arrays

*asked on September 3, 2013* -
## math

Danny has 75 marbles in red color and blue color. He found out number of red marbles is 15 less than twice of the blue marbles. What are the numbers of red and blue marbles does danny have?

*asked on April 3, 2013* -
## Physics

A parallel-plate capacitor is made from two aluminum-foil sheets, each 3.90 cm wide and 10.3 m long. Between the sheets is a mica strip of the same width and length that is 0.0225 mm thick. What is the maximum charge that can be stored in this capacitor?

*asked on February 24, 2013* -
## Chemistry

What is the lewis dot structure for copper?

*asked on February 21, 2013* -
## math

interest is $1104, principal is $4600, and time is 4 yrs. What is rate?

*asked on January 1, 2013* -
## Economics

5. If the average adult produces $90,000 of output per year, how much output is lost as a result of adult deaths from secondhand smoke, according to the News on page 74? $

*asked on November 23, 2012* -
## thermochemistry

A chemical reaction takes place in a container of cross-sectional area 100 cm2 . As a result of the reaction, a piston is pushed out through 19 cm against an external pressure of 596 torr. What is the value for w for this reaction?

*asked on October 14, 2012* -
## College Algebra

#2 Choose the end behavior of the graph of the polynomial function. f(x) 3x^3+3x^2-6x-5. I got Falls to the left and rises to the right. Is this correct? Thanks

*asked on January 22, 2011* -
## Math

Why did Airhead eat the dollar he brought to school

*asked on October 26, 2010* -
## Finance

Suppose you buy a 7% coupon, 20 year bond today when it's first issued. If interest rates suddenly rise to 15%, what happens to the value of your bond?

*asked on October 26, 2010* -
## Trig

Find the general solution for the equation 4tanx+cotx=5?????? and the steps please? THANYOO!

*asked on October 18, 2010* -
## french

does this sound alright? my teacher wants 100+ words Pour le petit déjeuner ce matin j’ai mangé une banane et des raisins et j’ai bu de l’eau mais d’habitude je mange un bol de céréales et bois du lait, c’est sain. Pour le déjeuner

*asked on March 5, 2009* -
## science

fallow a drop o water through three states of matter. describe what is happening to the molecules as the water turns to gas than describe what is happening to the molecules when the water freezes into ice

*asked on March 4, 2008* -
## Social Studies

Which territorial acquisition- excluding the original United States-- added the greatest number of states to the nation? Gadsden Purchase THIS ONE Louisiana Purchase Mexican Cession Oregon Territory Which of the following best describes the impact of

*asked on January 24, 2019* -
## Math

Hillary buys 3 pounds of Gala apples and some Granny Smith apples. Both kinds of apples cost $4.50 per pound. The total cost is $24.75. How many pounds of Granny Smith apples did Hillary buy? Write and solve an equation.

*asked on January 5, 2019* -
## Ap chemistry

a sample of radioactive iodine (half life=3 days) originally weighed 10 g, but now weighs 0.625 g. How old is the sample?

*asked on December 12, 2018* -
## Programming Java

I am learning Java in programming right now. I need to write a program that should have an output like this: The program says "Type ten names". Then ten names sould be typed a person. Then the program chooses a random name from the list and displays it on

*asked on November 16, 2017* -
## Math

Find the value of this integer expression: -2(+3+-4+-8++7) Calculate in distributions and without distribution. There are suppose to be an exponent with +3 and when you see ++7 there is suppose to be an exponent.

*asked on November 10, 2017* -
## History

What were Alexis de Tocqueville contribution to his time period and also what contribution did he make to there character of America?

*asked on November 5, 2017* -
## Math

Can anyone check this and see if I'm right? A crafts store bought 27 1/4 ounces of potpourri. The shop divides the potpourri into 2 1/2 ounce bags and sells each bag for $4.25. a. how many full 2 1/2 ounce bag of potpourri can the shop make. b. if all the

*asked on October 23, 2017* -
## Math

Mali-li has 7 1/2 yd of material. Her new skirt will take 4 5/8 yd. How much material will she have left after the skirt is made? 2 7/8 My answer 2 1/8 3 1/8 3 7/8 73 in. =___ ft 776 ft 6 1/2ft this one 8ft 7 1/4

*asked on October 23, 2017* -
## Math

Estimate these 14/16 + 1/5 2 0 1/2 1 This one 5 2/11 - 3 2/18 3 1 This one? 4 2 7 1/13 * 4 15/17 28 35 this one 48 40 I'm not very positive with the last two answers.

*asked on October 23, 2017* -
## Math

Are there any problems in this? -3 1/5 / -2/3 = -4 4/5 Here is the work it showed. -3 1/5 / -4 4/5=-16/5 * -3/2=-8/5 * -3/1 = -24/5= -4/5 To me, I think there is something wrong in this the answer suppose to be positive, not negative. The only thing that I

*asked on October 23, 2017* -
## Science

How does the amount of substance affect the rate at which temperature changes? I will like someone to explain this to me, please.

*asked on October 18, 2017* -
## Languege

Which sentence uses coordinates adjectives? Mario gazes at the large painting of the beautiful lake. Mario gazed at the lake and the beautiful painting. Mario gazed at the large, beautiful painting. Mario gazed at the beauty of the large painting. 2.Which

*asked on October 16, 2017* -
## Math

Name the subset of the real numbers to which each number belongs divided 113

*asked on October 16, 2017* -
## Social Studies

Where in North America did the Mound Builders live? in the Southwest in the Northwest in the Central Mexico in eastern North America THIS ONE Which statement best describes the agriculture of the Mayas Each year, they rotated the kinds of crops planted.

*asked on September 27, 2017* -
## Mathematics

When you are translating a number from scientific notation to standard form, what does the exponent tell you? The number of zeros to add to the end of the original number the number of places to move the decimal point to the left the number of places to

*asked on September 26, 2017* -
## Mathematics

1.What is 10^3 written in standard form 10 100 1,000 10,000 Please check this, my answer will be the third choice

*asked on September 22, 2017* -
## Mathematics

CHECK MY ANSWERS PLEASE 1.9 squared is equivalent to ___ 18 9^2 81 both b and c this one

*asked on September 15, 2017* -
## Math

Amy is making a drawing of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house. A 54 foot-tall water tower is

*asked on September 10, 2017* -
## Chemistry

How are the three types of intermomecular forces similar? How are they different?

*asked on July 17, 2017* -
## math

Explain how to write a function rule from the table below. Then write a function rule. X -2, -1, 0, 1, 2, Y 2.8, 3.4, 4, 4.6, 5.2 Please help

*asked on June 14, 2017* -
## math

A 128-lb person burns 320 calories per hour riding an exercise bicycle at a rate of 10 mi/hr. a) Write a function rule to represent the total calories burned over time by that person. b) Explain how the information in the problem relates to the function.

*asked on June 14, 2017* -
## Math

Simplify the polynomial 2x^2 + 6x - 7x + 8 - 3x^2 + 1 A)2x^2 + x + 9 B)-2x^2 - x - 9 C)-x^2 - x + 9 D)x^2 + 9 Please help me

*asked on June 12, 2017* -
## Math

Complete the following task in your discussion group: Create two different situations: one in which you use combinations and one in which you use permutations. Include specific details and an explanation about what makes each situation either a combination

*asked on May 11, 2017* -
## Chemistry 212

The isotope californium-252 has a half life of 162 days. How many days would it take for 61.7% of the original material to decay? I am using the equation t= (ln(nt/no))/ k and I am first solving for K using: k=(.693/t1/2) the suppose answer can range from

*asked on May 6, 2017* -
## Chemistry 212

The isotope sodium-22 has a half life of 2.60 years. What is the 1st order rate constant in inverse years? I am using the Ln (A/A0) = -Kt formula. Is that correct?

*asked on May 5, 2017* -
## Science

1.What challenges does [your topic] pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

*asked on April 3, 2017* -
## Math

jason weighs 36 pounds together he and his sister weigh four ponuds more than three times the weight of his sister what is the weight w of jason's sister? 36+ w= 3; 18 pounds 36+ w- =3w; 19 pounds 36+ w= 3w+4; 16 pounds 36+ w= 3w -4; 20 pounds

*asked on January 27, 2017* -
## help with trigonometry??

Jacob is standing 112 m from a building. The angle of elevation when he looks up to the top of the building is 62°. How tall is the building? I don't really understand how to solve this, please help!!

*asked on January 24, 2017* -
## Math

45 Over 180 *360

*asked on January 16, 2017* -
## Geometry

In abc, if ab =11 cm and bc =13 cm, what is the possible range of values for ac?

*asked on December 16, 2016* -
## Math

Carlita saw 5 times as many robins as cardinals while bird watching. She saw a total of 24 birds. How many robins did she see than cardinals?

*asked on November 29, 2016* -
## Social Studies

Throughout the 1900s, many countries in Africa and Asia gained independence from European colonial powers. India is one of these countries, having gained their independence from Britain in 1947. Why did people in India want independence? In what ways was

*asked on November 10, 2016* -
## Math

How can knowing associative property help you compute 2x8x2 mentally

*asked on October 26, 2016* -
## Math

15+37

*asked on October 19, 2016* -
## Science

what steps are important in the process of creating a scientific theory A) Hypothesizing,observing,and testing. B) Creating a prototype and trouble-shooting. C) Analyzing,Offering an opinion, and evaluating D) Trouble-shooting,hypothesizing,and evaluating.

*asked on October 3, 2016* -
## Math

Explain the difference in meaning between |-3| and -3. Plzz Help me on this!

*asked on September 29, 2016* -
## Math hellppp!!

how do you simplify this expression -12/3*(-8+(-4)^2-6)+2 Plzzz Help plzz!!

*asked on September 29, 2016* -
## math

What is the solution to r/-3=12?

*asked on September 21, 2016* -
## Math

What is the solution to 5q=-75? Please Help

*asked on September 21, 2016* -
## Social Studies

What is one change Mansa Musa brought to Mali? A) He sent all of the scholars out of the empire. B) He brought Christianity to the empire. C) He made Islam the empire's official religion. D) He gave the provinces their independence Plzzz!!!! Help Me Plzzzz

*asked on September 21, 2016* -
## Math

BD bisects

*asked on September 13, 2016* -
## Reading Help!!

Are there any books that are about greedy people that change? Other than Christmas Carol because I'm trying to write a compare and contrast paragraph.

*asked on May 24, 2016* -
## Reading

What are some books that are about greedy people who change for the better?

*asked on May 20, 2016* -
## Math

Shelly is working 250 math problems and she wants to finish in 6 days. If she works the same number of problems each day for 5 days how many problems will she have left to work on day 6?

*asked on March 21, 2016* -
## civics

Sarah supports ratifying a new Cybercrime society. She would like to write a letter expressing her support. Where would she send her letter? A)to a Supreme Court justice B)to her district representative C)to her senators D)to the president

*asked on November 2, 2015* -
## science

Why do earthquakes occur along the San Andreas Fault

*asked on October 31, 2015* -
## math

5 3/8cups=? fl oz

*asked on October 30, 2015*