# cathy

Popular questions and responses by cathy-
## chemistry

What is H+(aq) + –OH(aq) H2O(l)

*asked on January 15, 2011* -
## Physics

You are given vectors A = 5.0i - 6.5j & B = -3.5i + 7.0j. A third vector C lies on the xy-plane. Vector C is perpendicular to vector A, & the scalar product of C with B is 15.0. From this information, find the components of vector C.

*asked on June 23, 2013* -
## math

in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 62 813. how many terms are in the series?

*asked on January 12, 2014* -
## Math

If a triangle has sides of lengths 5,8 and 12 it is a right triangle ??!! True or false? Can someone please answer

*asked on July 6, 2020* -
## Math- Data Management

How would you solve this problem. The mean of 10 numbers is 8. If an 11th number is now included, the mean becomes 9. What is the value of the 11th number? Make an algebraic solution.

*asked on March 2, 2015* -
## solid mensuration

Two perpendicular chords divide a circle with a radius of 13 cm into 4 parts. If the perpendicular distances of both chords are 5 cm each from the center of the circle, find the area of the smallest part. Please include solution. Thanks.

*asked on December 1, 2012* -
## math

Money is invested in a savings account at 3.4% simple interest. After 1 year, there is $1695.76 in the account. How much was originally invested?

*asked on February 26, 2013* -
## Algebra

Two children balance on opposite ends of a seesaw. One child weighs 45 pounds and the other weighs 38 pounds. The distance between them is 10 feet. What is the distance of each child from the fulcrum (the center balance point of the seesaw)? (HINT: The

*asked on May 9, 2012* -
## Math

Diana has 520 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area?

*asked on December 4, 2012* -
## Math

Given AB = 18 , DE=6 , and AD = 5 find the perimeter of DEF

*asked on July 1, 2020* -
## Biology*STUCK*

The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

*asked on November 12, 2014* -
## Chemistry

What is the compound name for Sb2(CrO4)5? This is the only question I am having trouble with.

*asked on April 23, 2012* -
## physical science

. A swimming pool is exactly 20m long, 7m wide, and 2m deep. What is its volume in cubic feet to 3 significant figures?

*asked on July 5, 2012* -
## math

an electronics store receives a shipment of 40 graphing calculators including 3 that are defective. Four of the calculators are sleceted to be sent to a local high school. How many selections can be made using the original shipment

*asked on February 11, 2012* -
## solid mensuration

Determine the area of the segment of a circle if the length of the chord is 15 inches & located 5 inches from the center of the circle.

*asked on December 1, 2012* -
## Biology

In peas, tall plants (T) are dominant to short (t), purple (P) is dominant to white flower color (p), and round seeds (R) are dominant to wrinkled seeds (r). What is the phenotype of a plant with genotype TtppRr?

*asked on February 18, 2008* -
## STAT

A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct

*asked on February 20, 2015* -
## Psychology

Good day , please can you assist me with answering the following questions. There is a short paragraph describing a young man who has OCD symptoms. the questions are as follows "According to the DSM -IV diagnostic categories what diagnosis might you give

*asked on April 12, 2013* -
## Chemistry

If the equilibrium concentrations are [PCl5] = 1.0M, [Cl2] = 0.10M, what is the equilibrium constant value? PCl5(g) PCl3(g) + Cl2(g) Would you mind showing the calculations Please. I've been working on this problem over an hour now. Not certain if I am

*asked on January 20, 2013* -
## Early Childhood

Describe nine elements of daily structure recommended for any early childhood program.

*asked on December 3, 2012* -
## chemistry

how many moles of solute are contained in each solution? 250 mL of a 0.55 M NaNO3 solution? 145 mL of a 4.0 M HNO3 solution? 6.5 L of a 2.5 M HCl solution?

*asked on April 11, 2010* -
## Physics

Problem: A hunter shoots an arrow at a deer directly away from him. When the arrow leaves the bow, the deer is at a distance of 38 m. When the arrow strikes, the deer is at a distance of 51.00 m. The speed of the arrow is 65.00 m/s. What must have been the

*asked on February 2, 2009* -
## physics

Rearrange the kinetic energy equation to solve for: m And v

*asked on November 11, 2014* -
## Psychology

Please help in answering the questions below, this is the extract. Jamal is a 27 year old male who presented with some difficulties in his life. His main presenting concern was related to problems with alcohol and illicit drugs. He has reportedly had a

*asked on May 24, 2013* -
## Psychology

If the prototype is a block or ball, would the concept be construction or a toy?

*asked on June 10, 2012* -
## Psychology

Hi SRJ Please can you review my essay, I would appreciate any critisms In 1935 Allport claimed that “the concept of attitude is probably the most distinctive and indispensable concept in contemporary American social psychology”. (Allport, 1935)

*asked on October 4, 2010* -
## Science

The percent of atmosphere above and below 16.8 km is?

*asked on February 23, 2009* -
## Env Science

Using the 4 principles of sustainability Reliance on Solar Energy, Nutrient recycling, Biodiversity, and Population control. How would you classigy the following? Recycling soda cans :Using a rake instead of a leaf blower :Choosing to have no more than one

*asked on July 10, 2008* -
## Psychology

Treena is a personable student in Mr. Jordan’s math class. Mr. Jordan can see that Treena is popular with her peers. He regularly sees her conversing animatedly with her friends in the cafeteria and before and after school. She does well in class also.

*asked on January 27, 2015* -
## algebra

The slope of a vertical line is _________? The equation of the vertical line passing through (4, 5) is ________?

*asked on October 24, 2014* -
## Chemistry

Will someone show me the formula or help me through working this question? Thanks! A 2.85g lead weight, initially at 10.3 deg C, is submerged in 7.55g of water at 52.3 deg C in an insulated container. what is the final temperature of both substances at

*asked on April 10, 2014* -
## economics

Consider the following production possibilities table: Option Y X A 0 100 B 80 80 C 120 50 D 140 10 a)Provide a measure of the approximate marginal opportunity cost of an additional unit of X for each interval. Is the law of increasing cost satisfied?

*asked on October 23, 2013* -
## solid mensuration

Find the area of a segment of a circle whose diameter is 16 cm & the central angle measures 80 degrees. Please include solution. Thanks.

*asked on December 1, 2012* -
## solid mensuration

Find the area of a cyclic quadrilateral whose 2 sides measure 4 & 5 units, & whose diagonal coincides with a diameter of the circle. Suppose the radius of the circumscribing circle is 2 sq.root of 3 units. Please include solution. Thanks.

*asked on December 1, 2012* -
## statistics

if a test has a mean of 75, with a standard deviation of 11, what % of students scored an A (90 or higher)?

*asked on May 31, 2011* -
## Chemistry

Draw the best Lewis structure for NCCH2C(O)CH2CHO, a neutral molecule. Show all atoms, bonds, lone pairs, and formal charges.

*asked on September 11, 2009* -
## chemistry

How can you prepareead carbonate from lead (II)oxide and sodium carbonate

*asked on August 18, 2019* -
## Chemistry

What mass of carbon dioxide is produced when 7.5g of methane is completely burnt in air.

*asked on December 3, 2016* -
## Physics

A ladder 9 meters long is place a wall t base 2 metera away. What is the height reach by the ladder?

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

Name the least number that, when rounded to the nearest hundred is 700

*asked on October 1, 2015* -
## Education/College level

Using the NETS for teachers Standard 1. b. Facilitate and inspire student learning and creativity. b. Engage students in exploring real-word issues and solving authentic problems using digital tools and resources. Using this standard I have to: create a

*asked on March 14, 2015* -
## Math

The ratio of oil to vinegar in a certain salad dressing is 8:5. How much oil must be blended with 7 liters of vinegar for that recipe?

*asked on February 18, 2015* -
## Engineering Economy

Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually. My answer is

*asked on January 27, 2015* -
## engineering economy

Maintenance cost of an equipment is P20,000 for 2 years, P40,000 at the end of 4 years, and P80,000 at the end of 8 years. Compute the semi-annual amount that will be set aside for this equipment. Money worth 10% compounded annually.

*asked on January 26, 2015* -
## Geometry

The surface of a cube is painted red and blue, 3 sides of each. The cube is cut into 27 equal sized smaller cubes. Find both answers to the question, "How many cubes have at least 2 sides painted blue?" and "How many cubes have at least 1 side painted

*asked on January 24, 2015* -
## Biology*STUCK*

The fluid mosaic model describes the structure of the plasma membrane. Embedded within the plasma membrane are proteins and carbohydrates that contribute to the term mosaic. Glycolipids and glycoproteins are examples of carbohydrates on the surface of red

*asked on November 12, 2014* -
## math

If you can earn a 4% average return on your investments, how much invested capital must you have to earn $53000.00 per year.

*asked on November 7, 2014* -
## Biology

The scientist analyzes the insulin molecules, which are proteins, of three different species, A, B, and C. The insulin from A is different from B in six ways and from C in three ways. The insulin from B is different from C in two ways. Which two species

*asked on November 3, 2014* -
## algebra

The slope of a horizontal line is 0. The equation of the horizontal line passing through (4,5) is ________?

*asked on October 24, 2014* -
## college algebra

A line has the equation y = 5x + 4.(a) This line has slope of ___________? (b) Any line parallel to this line has slope _________? (c) Any line perpendicular to this line has slope _______?

*asked on October 24, 2014* -
## algebra

A rental company purchases a truck for $14,500. The truck requires an average cost of $6.75 per day in maintenance. (a) Find a linear function that expresses the total cost C of owning the truck after t days. C(t) = (b) The truck rents for $55.00 a day.

*asked on October 24, 2014* -
## algebra

The rate at which water evaporates from a certain reservoir depends on the air temperature. The table below shows the number of acre-feet (af) of water per day that evaporate from the reservoir for various temperatures in degrees Fahrenheit. Temperature,

*asked on October 24, 2014* -
## algebra

A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table. Time, min

*asked on October 24, 2014* -
## college algebra

There were 39,000 desktop publishing jobs in the United States in 2000. It has been projected that there will be 64,000 desktop publishing jobs in 2010. (a) Using the BLS data, find the number of desktop publishing jobs as a linear function of the year.

*asked on October 24, 2014* -
## math

expand a simplify the first three terms of each binomial power a. (2z*3 - 3y*2)*5 b. (3b*2 - 2/b)*14 c. (5x*3 + 3y*2)*8 d. (sqrt.a + sqrt.5)*10 sqrt= square root

*asked on January 14, 2014* -
## Special Education Setting Teachers Aide

children with a language or speech disorde are A)sometimes suffering from an aphasia.(my answer) B)always learing challenged. C)able to receive special help only after the third grade. D)unable to use communication boards. can someone please check if this

*asked on September 26, 2013* -
## english

5. Identify which of the two sentences below contains a verb agreement error. Then, explain how to correct the problem. a. Among the guests was a private detective. b. Neither of those mattresses feel comfortable

*asked on October 13, 2012* -
## english

Identify which one of the following sentences is missing punctuation. Please correct the error and explain why the correction is necessary a. I woke up when the book slipped from my lap and landed on my foot. b. After the book slid from my lap and landed

*asked on October 5, 2012* -
## english

The following sentence is missing punctuation: “The crowd upset by the delay began to chant loudly for the band to appear.” Explain where the error has occurred in this sentence and how it can be fixed. 6. Identify which one of the following sentences

*asked on October 5, 2012* -
## grand canyon

Draw a scatterplot indicating a strong negative relationship between the variables of income and mental illness. Be sure to label the axes correctly

*asked on July 20, 2012* -
## physical science

A horse galloped a mile in 2 min 35s. What was its average speed in km/h?

*asked on July 5, 2012* -
## Chemistry

If water is synthesized how much hydrogen would be needed to make 10.0 grams?

*asked on February 10, 2012* -
## Organic Chemistry

How many moles of hypochlorous acid are needed to react with 0.257 mol of 9-fluorenol? Molecular weight of hypochlorous acid = 52.46 g/mol MW of 9-fluorenol = 182.22 g/mol

*asked on February 1, 2012* -
## Writing

What if ten years ago, you started working as a clerk for DMD Medical Supplies? Six months ago, Liz Jakowski,the human resources director, promoted you to office manage. You manage two employees: Jack Snyder and Ruth Disselkoen. My office provides

*asked on December 14, 2011* -
## Ninth Grade English

Romeo and Juliet; Act 1 Scene 5 Chorus Now old desire doth in his death-bed lie, and young affection gapes to be his heir; That fair for which love groan'd for and would die, With tender Juliet match'd is now not fair. Now romeo is belov'd, and loves

*asked on November 19, 2011* -
## geometry

A square measures 18feet 6inches in length. If an octagon is inscribed in the square, then how long should each side of the octagon be?

*asked on July 15, 2011* -
## differential equations

solve the differential equation by seperation of variables 5. y'=xy/2ln y

*asked on March 17, 2011* -
## math

find x when... 0= (x^4) + 2x^3 -1

*asked on February 2, 2011* -
## Algebra II

I am stuck on a rational division problem: x is squared minus 1 0ver 1 divided by x-1 over x + 5 = I hope you can help, Cathy It has been five, stupied, hours now!

*asked on January 17, 2011* -
## English

In the first paragraph, underline all common nouns once and proper nouns twice. In the second paragraph, underline two pronouns. In the third paragraph, underline one action verb once, underline a helping verb twice, and circle a linking verb. In the

*asked on October 1, 2010* -
## Psychology

Discuss the prevalence and effects of Foetal Alcohol Syndrome (FAS) in South Africa with reference to either Erikson’s theory of socio-emotional development or Piaget’s theory of cognitive development. Identify at least one risk to normal

*asked on August 23, 2010* -
## HCR 210

I have an assignment for week 4 in HCR210 due Sunday. We are to interview small, medium-sized and large medical facilities and ask 13 questions regarding medical/patient records. There are no facilities in my area willing to disclose any information for

*asked on May 24, 2010* -
## chemistry

the reaction of aluminum metal (Al) with oxygen (O2) forms Al2O3. What is a balanced equation for this redox reaction. What are two half reactions to show how many electrons are gained or lost by each species?

*asked on April 11, 2010* -
## Math

Envision that you have served as business manager of Media World for over 2 years. You have noticed that for the last 12 months the business has regularly had cash assets of $20,000 or more at the end of each month. You have found a 6-month certificate of

*asked on October 19, 2009* -
## marketing

Explain the relationship between the 3 elements that constitute the marketing concept.

*asked on July 5, 2009* -
## trig

In a regular octagon, AB is a diagonal and CD joins the midpoints of two opposite sides. The side length of the octagon is 4 cm. To the nearest tenth of a cm. find a)AB and b)CD. I'm stumped.

*asked on January 15, 2009* -
## Math

how many outfits can be made from 5 shirts, 6 slacks, 7 ties? I never understand how to do this type of problem.

*asked on January 7, 2008* -
## Algebra 2

Two sailboats are 9.8 miles apart and sailing toward each other. The larger boat sails 4 miles per hour faster than the smaller boat. The two boats pass each other after 0.7 hour. Find the speed of each boat. I cannot figure out for the life of me how to

*asked on September 17, 2007* -
## medical

Why were payment status indicator (PSIs) created? a. To initiate correct billing for APCs b. To generate chargemaster codes for reimbursement c. To create coding scenarios for special payers d. To make providers and payers aware of the services and

*asked on February 5, 2020* -
## History

Which accurately defines heliocentric theory? concept of the solar system with the sun at the center and planets orbiting it Is this the correct answer?

*asked on November 6, 2018* -
## History

Which correctly defines divine right? A)the belief that people have the right to challenge religious authority B)the idea that religious leaders should guide society and the state C)the belief that all people are born with God-given rights D)the idea that

*asked on November 6, 2018* -
## History

Which defines caste system? A)Muslim system of separating men and women in society B)European feudal practice of granting knighthood to a warrior C)Hindu practice of determining social status by birth D) Buddhist belief of spiritual equality based on

*asked on November 6, 2018* -
## History

In which type of government is power held by the people through elected representatives? A)republic B)theocracy C)feudalism D)monarchy A?

*asked on November 6, 2018* -
## 6th grade math

Write the expression 6a in words Write the expression 3x+7 in words

*asked on October 31, 2018* -
## Language arts

Compare and contrast your independent reading selection with one or two other selections you have read in this unit. SUpport your response with at least 2 pieces of evidence from your Independant Reading selection. Be sure to give the title an author of

*asked on October 18, 2018* -
## math

cot u - cot 2u = cosec 2u

*asked on April 3, 2018* -
## Reading-Sentence completion

The fertile and productive fields are located at the __________ of the Gila and the Arizona Rivers and are ______________ by waters from both. a) Juntion, Desiccated b) Confluence, irrigated c) bank, drained d) source, submerged e) end, inundated

*asked on July 28, 2017* -
## Math

At Laurita's bakery 3/5 of the baked goods are pies and the rest are cakes. 1/3 of the pies are coconut. 1/6 of the cakes are angel-food. What fraction of all of the baked goods at Laurita's Bakery are coconut? What fraction of all the baked goods at

*asked on March 6, 2017* -
## Geomety

the surface area of a cylinder is 500 square feet; the lateral surface area is 320 square feet. give the area of the base

*asked on February 13, 2017* -
## Science

Why can'y pyramids of energy never be inverted?

*asked on September 14, 2016* -
## algebra

Here are the scores of 13 students on an algebra test. 55 , 57 , 60 , 60 , 65 , 68 , 70 , 70 , 80 , 80 , 84 , 89 , 92 Notice that the scores are ordered from least to greatest. Give the five-number summary and the interquartile range for the data set.

*asked on August 28, 2016* -
## Physics

If a man walks 4 km east and then 5 km south. How far is he from the point where he started?

*asked on July 29, 2016* -
## Math

If a family plans to have four kids what is the probability that they will have at least one girl

*asked on July 14, 2016* -
## Math

Patel is 5 yrs older than sam. In 2 yrs time,Patel will be twice as old as sam. How old is each now???

*asked on February 24, 2016* -
## Math

Lucy used 3 3/4cups of sugar for her lemonade stand she divided the sugar in equal amounts into 6 pitcher how much sugar went into each pitcher

*asked on November 9, 2015* -
## College/education class

What are the most effective and ineffective uses of objective assessments for instructors and learners? What is your view on the relative advantages and disadvantages of using objective tests? How might you incorporate objective assessments in your

*asked on April 21, 2015* -
## College/education class

Where can I find examples of a formative assesment a summative assessment a formative evaluation and a summative evaluation. And can you tell me what the difference is between the assessments and the evaluations. From what I understand in my text,

*asked on April 16, 2015* -
## Education/College level

Considering the pros and cons concerning electronic gaming make a case for or against the use of these educational games in the leaning environments. if I get ideas from others I must use a citation. Can you help me write teacher. I work in the prek

*asked on March 28, 2015* -
## Education/College level

National Education Technology Standards: NETS for Teachers. 1. Facilitate and Inspire Learning and Creativity. b. engage students in exploring real-world issues and solving authentic problems using digital tools and resources. What skills and competencies

*asked on March 7, 2015* -
## engineering science n3...please help and explain

Heat A.5kg of steel is cooled down in oil and the temperature drops from 900 degrees celsius to 27degrees celsius. The specific heat capacity of steel is 460J/kg degrees Celsius and that of oil 1.5kJ/kg degrees Celsius Calculate the following: 1.quantity

*asked on February 24, 2015*