# Mark

Newest questions and responses by Mark-
## Chemistry

The densities of three solutions with known concentrations ( 20% , 50%, and 70%), and one unknown solution were determined. If the densities of 20%, 50% and 70% solutions are 0.69 and 0.58 and 0.49 g/mL, respectively, and the denisty of the unknown

*asked on February 20, 2019* -
## Psychology

You want to conduct a psychological research and must identify a way of collecting data. Your hypothesis is: Mental illnesses occur more frequently in people with top management jobs as opposed to lower level/non-management jobs. Which of the following

*asked on February 9, 2019* -
## english

for this reference below, how do I cite IN TEXT ? The Federal Response to Hurricane Katrina: Lessons Learned". The White House. January 20, 2009. Retrieved June 7, 2015. is it just(White House). ? Thank you

*asked on December 8, 2018* -
## Math

suppose y varies directly with x, and y = 25 when x = 140. What is the value if y when x = 36? a.) 140 b.) 165 c.) 201.6 d.) 176

*asked on December 5, 2018* -
## history

Which identifies a revival of classical art, literature, and scholarship that spanned the 14th to 17th centuries in Europe? Romanticism Renaissance Scientific Revolution Reformation Is It Renaissance?

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

The capacity of the box is 36000 cubic centimeters. Find the least materials used in making the box if the length is twice its width.

*asked on October 12, 2018* -
## history

Using at least one example from each of the three foundational documents that you have worked with on this assignment, tell me how the Magna Carta, the English Bill of Rights, and the Mayflower Compact led to at least three rights of governmental concepts

*asked on September 20, 2018* -
## World History

What was the historic name of the Southeast Asian region that lies east of India and south or southwest of China? Indochina Mongolia Tibet Philippines B?

*asked on August 3, 2018* -
## electronic

A 1mm cross section of copper wire is isolated. The charge that flows through the cross section is Q t = 4t^2 + 5 How much current flows through the wire in 6 seconds?

*asked on July 4, 2018* -
## math

Find the distance from the origin to the line x-2y=4

*asked on June 6, 2018* -
## math

During a training exercise, a submarine travels 16 km/h on the surface and 10 km/h underwater. if the submarine traveled a distance of 160km in 12.5h, how long was it underwater?

*asked on June 6, 2018* -
## algebra 2

what is the quotient in simplified form? State any restrictions on the variable. (6-x)/x^2+3x-28 divided x^2-36/x^2+5x-36

*asked on May 31, 2018* -
## math

The scale for a map says that 1 cm is equal to 25 miles. Jennifer measures the distance between two cities as 4.5 cm. How far apart are the cities? A) 90 miles apart B) 112.5 miles apart C) 128.5 miles apart D) 149 miles apart

*asked on May 23, 2018* -
## Algebra

An investment account earns 7.5% per year compounded quarterly. How many years will it take for the account to triple its initial value. (Make sure that you round up) For the death of me, I can't figure out how to do this problem. Can anybody walk me

*asked on May 21, 2018* -
## Social Study

How did the location of the Arabian Peninsula help the Muslims conquer territory beyond the Arabian Peninsula?

*asked on May 20, 2018* -
## Math

A bus company has 4000 passengers daily, each paying a a fare of For each each $0.15 increase, the company estimates that it will lose 40 passengers. If the company needs to take in $10 450 per day to stay in business, what fare should be charged?

*asked on May 19, 2018* -
## Science

Can somebody give me their simple definition (6th grade level) of a point source and pollution?

*asked on May 10, 2018* -
## Calculus

Find the amount of a continuous money flow in which $1000 per year is being invested at 5% compounded continuously for 40 years. How would I set up my equation in order to solve?

*asked on April 27, 2018* -
## Social Studies (Check my work)

What factors contributed to the weakening and decline of Medieval Europe? My answer: In the 14th century, there was a disease called the black death. It weakened Medieval Europe a lot because it killed millions of Europeans. Is this good?

*asked on April 13, 2018* -
## US History

Camp meetings, like the one in the picture above, were thought to inspire which of the following? (picture showing crowds of people gathered around people in a forest) Men and women to give their lives to God ** Men and women to accept and pray for sinners

*asked on April 12, 2018* -
## Social Studies help

What is a cradle-to-grave system? A. a system of state-run hospitals and nursing homes B. an association of doctors and nurses C. an association of nursery schools and public schools D. a system of basic services for every stage of life **

*asked on March 29, 2018* -
## !!!!!SCIENCE HELP!!!!!

4. Explain the data you will want to collect on your mission, and list the instruments you’ll need so that you can collect and store samples while on your mission. Describe how any collected data will be used when you return from your mission. (3 points)

*asked on March 27, 2018* -
## Math

A new elementary school will have 50 faculty members. Some will be teachers and the rest will be aides. At this school, teachers will earn 20,000 dollars a year and the aides 12,000 dollars. The total amount to be spent on salaries is $872, 000. How many

*asked on March 13, 2018* -
## Art

A container is decorated with images of Egyptian gods and placed inside a tomb. What is the likely function of this object, given what you know about Egyptian culture? A. This container was probably designed to protect the internal organs of the dead

*asked on March 12, 2018* -
## Math

Tom bought three tee shirts for the sale price of $14.50. The three tee shirts were originally priced $3.99,$6.99, and $5.99. How much money did he save compared to the original total price of the T-shirts? Show your calculations. What percentage of the

*asked on March 7, 2018* -
## Math

Use a left endpoint Riemann sum approximation with four subintervals to evaluate integral from 0 to 8 of g(x)dx These points were given: (0,-1) (1,-1.5) (2,-2.5) (3,-3) (4,-1.5) (6,-0.5) (7,-1) (8,-1.25

*asked on February 25, 2018* -
## math

A little help please, thanks. Kelly conducted an experiment. In each trial she flipped a coin and rolled a number cube that has sides labled 1 to 6. The results are shown above. What is the experiementl probability that her next flip will be tails? Trial

*asked on February 21, 2018* -
## Calculus

Your classmate claims that the the function f(x,y) = x^3(e^{x^2−3y^2})−(17−3x^2)(y−2) does not have an absolute maximum nor an absolute minimum when the function is restricted to the disk x^2+y^2 ≤ 7. Please explain why this is incorrect.

*asked on February 16, 2018* -
## Math

Need some help setting this up. Thank you. A dance studio measures 150 feet by 120 feet. A scale drawing of the dance studio floor measures 10 units by 8 units. What scale was used to create the scale drawing? A) 1 unit: 8 feet B) 1 unit: 10 feet C) 1

*asked on February 15, 2018* -
## Math

A hippopotamus can stay under water for 15 minutes. A sea cow can stay under water y minutes. This is 11 minutes longer than one third the time a hippopotamus can. Write an equation and solve to determine how long the sea cow can stay under water.

*asked on February 6, 2018* -
## Math

I'm stumped on this question, would appreciate some help please. Ms. Babalola has a bag that contains 4 white beads, 6 red beads, 5 yellow beads, and 5 blue beads. One head is selected and not replaced. Then a second bead is selected and replaced. Then a

*asked on February 3, 2018* -
## math

suppose that the average number of snow globes per household is distributed between 3 and 9.

*asked on December 14, 2017* -
## Language Arts

The football team cannot play ____ best when it is so hot. A. its ** B. our C. their D. you're I had this question in a language arts meeting with my teacher but I forgot the answer. I know that she talked about it being a trick question though so I'm not

*asked on December 12, 2017* -
## Social Studies

Colombian eradication programs designed to limit or halt the production of crops used to produce drugs is unlikely to cause a decrease in A. deforestation B. poor soil quality. C. The population of Columbia. D. the number of healthy Columbian children. My

*asked on December 7, 2017* -
## Language Arts

Which sentence correctly uses pronouns? A. If people want to succeed in life, they must know the rules of the game. B. If someone wants to succeed in life, we must know the rules of the game. C. If a person wants to succeed in life, you must know the rules

*asked on December 7, 2017* -
## Language Arts

Which sentence correctly uses pronouns? A. If people want to succeed in life, they must know the rules of the game. B. If someone wants to succeed in life, we must know the rules of the game. C. If a person wants to succeed in life, you must know the rules

*asked on December 7, 2017* -
## Physics

The work done by one mole of a monatomic ideal gas (gamma=5/3) in expanding adiabatically is 964 J. The initial temperature and volume of the gas are 395 K and .0848 m^3. Obtain a) the final temperature and b) the final volume of the gas.

*asked on December 6, 2017* -
## Physics-Please Help

A foot pushes against the ground with a force of 777 N in the vertical direction with a perpendicular displacement of 0.125 m away from the COM and 850 N in the horizontal direction with a perpendicular displacement of 0.025 m away from the COM. If the

*asked on November 30, 2017* -
## Math generating functions

at present, there is one-hundred thousand in a trust fund. The fund earns two % interest per year, but ten% of the fund is given away each year. Also, ten-thousand is put into the trust fund per year. 1a) Obtain and solve the difference equation by

*asked on November 27, 2017* -
## Statistics

Sickle cell disease is an inherited blood disorder that affects red blood cells. Since it is a recessive disorder, a person inheriting two sickle cell genes will have the disease, whereas a person inheriting only one sickle cell gene will be healthy, but

*asked on November 27, 2017* -
## Ed tech

Which of the following questions will most likely be answered by displaying data on a bar graph? A. Which bank account earned interest the fastest last year? B. Which ice cream flavor do the most students prefer? ** C. How many total hours did the class

*asked on November 12, 2017* -
## Scott ---algebra

Scott... wouldn't the x be -6?..thanks posted by mark today at 6:56pm. use intercepts to graph the line described by each equation: -6y = -4x + 24 I was told that the x intercept is 6 the y intercept is -4 Can you please explain to me how that's the answer

*asked on November 7, 2017* -
## algebra

use intercepts to graph the line described by each equation: -6y = -4x + 24 I was told that the x intercept is 6 the y intercept is -4 Can you please explain to me how that's the answer step by step please (baby steps) Thank you

*asked on November 7, 2017* -
## math

Write a system of equations, three equations/three unknowns, that has (1, 2, 3) as the solution.

*asked on November 5, 2017* -
## pre algebra 8

Michael wants to rent a car on his vacation. The rental fee is 60 dollars per day plus a refueling charge of $40. He has at most 400.00 to spend. The inequality 60d +40

*asked on November 4, 2017* -
## Grade 8 prealgebra

Michael wants to rent a car on his vacation. The rental fee is 60 dollars per day plus a refueling charge of $40. He has at most 400.00 to spend. The inequality 60d +40

*asked on November 4, 2017* -
## grade 8 pre-algebra

Grace earns 7 dollars for each car she washes. She always saves 25 dollars of her weekly earnings. This week, she wants to have at least 65 dollars in spending money. How many cars must she wash? Write and solve an inequality to represent this situation.

*asked on November 4, 2017* -
## Math help

Paul is painting a square wall with an area of 115 square feet. To the nearest foot, what is the length of the wall? (1 point) 11 29 ** 42 58

*asked on October 29, 2017* -
## chemistry

Calcium carbide (CaC2) reacts with water to produce acetylene as follows. The complete reaction of 25.2g CaC2 produces ____ grams of calcium hydroxide. CaC2(s) + 2H¬2O(g) → Ca(OH¬)2(s) + C2H2

*asked on October 26, 2017* -
## mark check my work algebra

a cartoonist uses the function below to calculate the net profit he earns from sellings his drawings.In the function, d represents the number of drawings he sells. N(d)= 30(d)-$500...what is domain of N(d)? is the answer all non negative real numbers?

*asked on October 25, 2017* -
## pre algebra

f(x)=9x+7 The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. help why is the answer negative infinity, infinity? thank you so much...please

*asked on October 25, 2017* -
## pre algebra

what is the domain of the function below? f(x)= -x^2 + 11 thank you choices are: 1. (- infinity, 11) 2. (-infinity, infinity) 3.(-11, 11) 4. (11, infinity)

*asked on October 25, 2017* -
## Math/Physics

Steve (85 kg) is gliding (v ≠ 0) east on his cross-country skiing across a flat section of snow and is experiencing a wind resistance of 2 N against him. The coefficient of kinetic friction between the skis and the snow is 0.09. If the force of friction

*asked on October 23, 2017* -
## pre algebra

Lilliana is training for a marathon. She runs the same distance every day for a week. On Monday, Wednesday, and Friday, she runs 3 laps on a running trail and then runs 6 more miles. On Tuesday and Sunday, she runs 5 laps on the trail and then runs 2 more

*asked on October 19, 2017* -
## Calculus

a pebble is dropped into a calm pond, causing ripples in the form of concentric circles. the radius r of the outer ripple is increasing at a constant rate of 1 root per second. When the radius is 4 feet, at what rate is the total area A of a disturbed

*asked on October 10, 2017* -
## pre algebra

Jonathon is starting a new job where he will earn $100 per week plus 15% commission on all sales. Write an equation and solve it to show what his sales were for a week if he earned $380.00? Round your answer to the nearest integer. Thank you! I think you

*asked on October 5, 2017* -
## Social Studies

The Inuit made temporary shelters in the summer out of which type of material? A. Snow B. Animal skin ** C. driftwood D. metal I'm confused because they made tents out of driftwood and animal skin.

*asked on October 5, 2017* -
## PE

A ________ is the way a person reacts to a situation based on the social environment in which a person grows up. Coping Strategy Defense Mechanism ** learned emotion primary emotion

*asked on September 30, 2017* -
## Language Arts

What impact did your Independent Reading selection have on you as a reader? Would you recommend your selection to a friend? Why or why not? Support your response with at least two pieces of evidence from your Independent Reading selection. Be sure to give

*asked on September 30, 2017* -
## Math

How many ounces of 1% antifreeze solution must be added to 100 ounces of 40% antifreeze solution to obtain a 16% antifreeze solution? how do I set this equation up?

*asked on September 29, 2017* -
## Social Studies

Since Canada’s labor force growth is made up of 70% immigrants and is projected to rise to 100%, you might best speculate that Canada’s government has a(n) ______________ policy. A. anti-immigration B. pro immigration C. Constitutional ** D. democratic

*asked on September 29, 2017* -
## math

here are a series of questions and my answers are down below, please help me if I am wrong 1. Sain Advertising Ltd.’s opening trial balance on January 1 shows Supplies $1,600. On January 11, the company purchased additional supplies for $2,510 on

*asked on September 28, 2017* -
## 9th grade algebra

solve for h The formula for finding the area of a trapezoid is A = 1/2 (b1 + b 2)h where A represents the area of the trapezoid, b1 and b2 are bases, and h represents the height. Solve the formula for h. I know the answer is h = 2A/b1 + b2 but I don't

*asked on September 28, 2017* -
## Economics

You have $3000 in an account that yields a nominal return of 6%. If the inflation rate is 3%, how long will you have to leave your money in the account for it to double in real terms?

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

You have $3000 in an account that yields a nominal return of 6%. If the inflation rate is 3%, how long will you have to leave your money in the account for it to double in real terms?

*asked on September 26, 2017* -
## Language Arts answers

Players wear helmets and pads for protection. (direct objects, predicate nouns) Helmets and pads for protection.(direct object) However, injuries can sometimes be serious or lasting. (indirect objects, predicate adjectives) Sometimes be serious or

*asked on September 21, 2017* -
## Language arts help

Identify the complement in each sentence. Then, indicate its type in parentheses. Football is a sport and also entertainment. (indirect objects, predicate nouns) _____________________________ Please help. I have no idea how to do this. I don't know how to

*asked on September 21, 2017* -
## Journal entries accounting

journalize the following entries: 1, Received partial payment of $211 from J. Kronsnoble for work billed on June 7. 3. Paid for supplies purchased on June 4. my answers: 1. cash 211 accounts recvieable 211 3. supplies 258 accounts payable 258

*asked on September 20, 2017* -
## Math

Sam is at the driving range practicing his swing. During Sam’s golf drive, the initial angular velocity of his club is 5 rad/s at the start of the backswing. The constant, average angular acceleration of the club between the start of the backswing and

*asked on September 20, 2017* -
## Math

Sam is at the driving range practicing his swing. During Sam’s golf drive, the initial angular velocity of his club is 5 rad/s at the start of the backswing. The constant, average angular acceleration of the club between the start of the backswing and

*asked on September 20, 2017* -
## Math/Physics

Sam is at the driving range practicing his swing. During Sam’s golf drive, the initial angular velocity of his club is 5 rad/s at the start of the backswing. The constant, average angular acceleration of the club between the start of the backswing and

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

You are going hiking in Brown County State Park this weekend and want to plan your route to Lake Monroe. Starting from the parking lot, you plan on hiking 2300 m due west, 17500 m due south, 1900 m due east, and 1200 m due north. What will be the total

*asked on September 19, 2017* -
## pre algebra

a(n-3)+8=b solve for n an-3a +8=b (subtracted an from left side) I get: 3a+8 = b-an =3a +8 = b-a(n) =3a+8/b-a = n but i think this is wrong...help...thank you

*asked on September 18, 2017* -
## algebra 1

given that 1 mile is 5280 feet, covert 92 feet per minute to miles per hour I don;t get it...the part that confuses me is the "per minute" ..i don;t get the relationship to the mile thing....totally stumped..sorry can't even offer an idea how to do this

*asked on September 18, 2017* -
## Math

In how many ways can 4 married couples seat themselves around circular table if at least one husband sits beside his wife?

*asked on September 9, 2017* -
## Language Arts

Choose the phrase that would best replace the italicized words in the sentence. the ringing of the school bell was "music to my ears" A. a pleasant melody B. a band playing loudly C. a welcome sound** D. a warning signal

*asked on September 8, 2017* -
## Social Studies

Both parliamentary and unitary systems A. deny voting rights to their citizens. B. Give most power to the states. C. Have strong national executive leaders. ** D. Forbid local governments from making decisions.

*asked on August 31, 2017* -
## Social Studies

1. Which statement best describes nations? A. must follow the laws set by the United Nations. B. Nations have less political power than do regional organizations. C. Nations interact almost exclusively with other nations in their region, D. Nations have

*asked on August 31, 2017* -
## Educational Tech

Which of the following should you use to change text size, color, and font face to make a section label stand out? A. Overtype B. Heading Styles C. text wrapper ** D. Footnote

*asked on August 31, 2017* -
## Social Studies

A) the U.S. cannot get goods from other places. Reactivate B) Canada has better farming areas than the U.S. ** C) the U.S. and Canada are unified by trade agreements. Reactivate D) Canada and the U.S. are located close to one another.

*asked on August 29, 2017* -
## building a stair system

My stair system, call it a triangle, is 360 inches in diameter, and 77.5 inches high. what is the length and formula?

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

A farmer kept track of his cows and chickens by counting both the legs and the heads, if he counted 78 legs and 35 heads, how many cows and how many chicken did he own?

*asked on July 10, 2017* -
## Accounting

A company operates an arcade place where customers put money into game membership cards and they also accumulate points for winning and can be redeemed for prizes. How to account for the credits not yet used and also the points? I would think.... 1) For

*asked on July 2, 2017* -
## math

Two simmers are swimming in a lake. Swimmer A starts swimming at a speed of 1m/sec towards the shore from a distance of 30 m. Swimmer B starts swimming towards the shore from 10m behind swimmer A but he swims at 1.5m/sec. Which swimmer will arrive at the

*asked on June 29, 2017* -
## math

how many different 5 player teams can be chosen from eight players? What formula do I use to solve this?

*asked on June 26, 2017* -
## Riddle

I make it happen then I get lost

*asked on May 14, 2017* -
## Statistics

Two cards are drawn in succession from a deck without replacement. What is the probability that both cards are greater than 2 and less than 8?

*asked on May 3, 2017* -
## 8th gr algebra

There are 52 cards in a standard deck. if you draw a card, do not replace it, and then draw 4 more cards, one at a time without replacement, how many possible outcomes are there? I don't get it...Thank you

*asked on May 2, 2017* -
## alalgebra 8th grade check my work

At an amusement park, Tami chooses one each from the following options: 3 movies, 20 rides, 6 snack shops. Find the number of possible outcomes. Is it 3 x 20 x 6 = 360 possible outcomes? thanks!!!!!

*asked on May 2, 2017* -
## Wave Particles

A stationary proton absorbs an x-ray with a wavelength of 0.24 nm. Determine the proton's final velocity.

*asked on April 25, 2017* -
## Trig/Pre-Calc

A bird is flying 30 mph in a direction 30 degrees south of east. Affecting the flight of the bird is a wind blowing from the northeast to the southwest at a speed of 10 mph. What is the resulting speed of the bird?

*asked on April 21, 2017* -
## Math

Joe takes his wife and four children to the movies. their tickets cost $56. the adult tickets cost twice as much as the children's tickets. how much is one adult ticket?

*asked on April 17, 2017* -
## geometry/check my work

For triangle ABC , which transformation composition is Commutative? a) rotate 30 degrees and then translate 2 units down b) translate 5 units to the right and rotate 90 degrees c) reflect across the y-axis and then rotate 90 degrees d) reflect across the y

*asked on April 5, 2017* -
## grammar-check my work thank you

Identify the phrase in parentheses as a gerund phrase, participle phrase or infinitive phrase. When the Christmas holidays arrive, (bustling shoppers fill the stores). I think it is a gerund phrase because it acts as a noun

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

if f1= 3i + 5j + 6k and f2= 2i + 3j - 4k both measure the newton are displaced by d= 3i - 2j + 4k measure the metre, find the workdone

*asked on April 1, 2017* -
## English

1. The idiom get inside the authors head means to 2. Base word of accusation

*asked on March 26, 2017* -
## Physics

A car is traveling on a level horizontal rode comes to a bridge during a storm and finds the bridge washed out. The driver must get to the other side, so he decides to try leaping it with his car. The side of the road the car is on 21.3m above the river,

*asked on March 22, 2017* -
## Physics

A car is traveling on a level horizontal rode comes to a bridge during a storm and finds the bridge washed out. The driver must get to the other side, so he decides to try leaping it with his car. The side of the road the car is on 21.3m above the river,

*asked on March 22, 2017* -
## Math

If I earn £200 a week,the tax man takes 3/8 of it and I pay my mum 1/2 of my earnings for rent , how much do I end up having to spend on things I want?

*asked on March 17, 2017* -
## Organic Chemistry

What is the literature value for the partition coefficient for caffeine?

*asked on March 15, 2017*