# D

Popular questions and responses by D-
## Math

Jeremy loves right triangles that have side length 1. In fact, he loves to combine them so that the hypotenuse of one becomes the leg of the next. If the longer leg of the first triangle is sqrt 11, what will be the hypotenuse of the 2014th triangle? I

*asked on November 14, 2016* -
## Math (Updated)

F(x)=9x^3+2x^2-5x+4 and g(x)=5x^3-7x+4. what is f(x)-g(x)? Show all of your steps and write your finial answer in factored form.

*asked on April 10, 2018* -
## Calculus 1

If you have 280 meters of fencing and want to enclose a rectangular area up against a long, straight wall, what is the largest area you can enclose?

*asked on November 22, 2011* -
## Calculus, math

Consider the function below. (If an answer does not exist, enter DNE.) f(x) = e^arctan(7x) I did the problem but I have mistakes on some items. I think the ff. are right: Vertical Asymptote: x = DNE Horizontal Asymptote: y = e^-(pi/2), e^(pi/2) Interval

*asked on April 2, 2020* -
## Finance math

9. Compute the present value of $4,000 paid in five years using the following discount rates: 10 percent in year 1, 2 percent in year 2, 12 percent in year 3, and 9 percent in years 4 and 5.

*asked on October 12, 2014* -
## U.S. History

1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a horse and

*asked on May 27, 2016* -
## Finance

1. What is an entrepreneur? (1 point) a sole proprietorship a corporation one who opens a new business a bank that loans money 2. Which of the following is the best definition of probable operating costs? (1 point) Amount of money required to start a

*asked on April 15, 2018* -
## physics

(c) Tube (c) is again filled with water. A1 and A2 are the same as in part (b). Two pistons apply different forces to the water in the tube so that the water in the right side of the tube is a height h = 0.43m above the height of the water in the left side

*asked on May 1, 2011* -
## Chemistry

Consider the reaction: 2CH4(g) + 3O2(g) + 2NH3(g) --> 2HCN(g) + 6H2O(g) If 203.5 g NH3 is reacted with excess CH4 and O2, what mass in grams of HCN can be produced?

*asked on April 30, 2017* -
## math

You flip a fair coin 10,000 times. Approximate the probability that the di fference between the number of heads and number of tails is at most 100.

*asked on February 28, 2017* -
## physics

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends find the moment of inertia

*asked on February 12, 2015* -
## GEOMETRY

parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?

*asked on October 16, 2013* -
## math

The owner of a service station receives a loan of $8,500 at 10.5% for 7 months. Find the amount of simple interest

*asked on September 20, 2013* -
## German

Ich schminke mich lieber als er sich. is this incorrect or correct?

*asked on March 1, 2013* -
## Physics

An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects

*asked on November 13, 2012* -
## chem

Magnesium burns in air to produce magnesium oxide, MgO, and magnesium nitride, Mg3N2. Magnesium nitride reacts with water to give ammonia. Mg3N2(s) + 6 H2O(l) → 3 Mg(OH)2(s) + 2 NH3(g) What volume of ammonia gas at 24°C and 753 mmHg will be produced

*asked on March 6, 2011* -
## Math

Given line AB, explain how to construct a square with sides of length AB.

*asked on October 10, 2018* -
## chemistry

Given a 1.00 L solution that is 0.60 M HF and 1.00 M KF, calculate the pH after 0.080 mol NaOH is added, and calculate the pH after 0.24 mol HCl is added to the original solution.

*asked on April 17, 2017* -
## precalc

write a linear equation to fit each situation or description. 1) the line through (2,4) parallel to the x axis. 2) the line through (2,4) perpendicular to the x axis. 3) the line through (3,1) perpendicular to y=4x-3. 4) the line through (-2,5) parallel to

*asked on August 31, 2015* -
## physics

A light, rigid rod l = 5.55 m in length rotates in the xy plane about a pivot through the rod’s center. Two particles of masses m1 = 9.8 kg and m2 = 2.4 kg are connected to its ends. Determine the angular momentum of the system about the origin at the

*asked on February 12, 2015* -
## Finance kennedy king

4. A firm's net income last year was $1.5 million. Its net income grew 5 percent during the last 5 years. If that growth rate continues, how long will it take for the firm's net income to double?

*asked on October 13, 2014* -
## Math

A couple needs $15,000 as a down payment for a home. If they invest the $10,000 they have at 8% compounded quarterly, how long will it take for the money to grow into $15,000?

*asked on October 9, 2013* -
## chemistry

Iwish to prepare 3% NH3 from 20ml strong NH4OH and 180ml H2O.Can you help me?

*asked on February 7, 2013* -
## Physics

Well, hard to imagine the picture, but by the description the wires each side are at 16 deg. back on each side of the tooth, i.e. each at 16 deg. to the face of the tooth. Each has 18N. tension. (sin 16) x 18 = 4.9608N. Double it (2 wires), = 9.9216N. back

*asked on October 25, 2012* -
## geometry

Given the quadrilateral ABCD with the following vertices A(-4, 0), B(10, 0), C(10, 10), and D(0, 14), find its area.

*asked on June 6, 2011* -
## geometry

In ΔABC, angleB = 46°, angleC = 28° and AB = 50. Find BC (to the nearest hundredth).

*asked on June 6, 2011* -
## AP Chemistry

The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

*asked on November 4, 2010* -
## math

If the probability that an identified hurricane will make a direct hit on a certain stretch of beach is 0.10, what are the odds in favor of a direct hit? a. 1:10 b. 1:9 c. 9:1 d. 8:1

*asked on September 18, 2010* -
## adult education CSJ

What are the steps leading to a trail, the importance of the Sisxth Amendment, The process of jury selectin and the procedures of ajury trail. The fundamental philosphies surround the purpose of sentencing. The factors that go into the determination of

*asked on December 15, 2008* -
## accounting

how do i record adjusting and closing entries for a service business? how do i do a post-closing trial balance?

*asked on December 3, 2008* -
## Math

Find the two square roots of 5-12i in the form a+bi, where a and b are real. Mark on an Argand diagram the points P and Q representing the square roots. Find the complex number of R and S such that PQR and PQS are equilateral triangles. How do you do the

*asked on March 14, 2020* -
## Math

a. Do some research and find a city that has experienced population growth. Determine its population on January 1st of a certain year. Write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a

*asked on March 11, 2018* -
## chemistry

Please balance magnesium sulfate and iron III acetate

*asked on March 6, 2018* -
## Science

How is velocity different from speed?

*asked on March 1, 2018* -
## math

Kevin had $15 with him. His mother gave him $10 and his father also gave him some money. After this, he had a total of $37 with him. How much money did his father give him? Write an equation with a variable and state what the variable represents.

*asked on May 24, 2017* -
## Geometry

1.1.Determine whether the regular pentagon has reflection symmetry, rotation symmetry, both, or neither. If it has reflection symmetry, state the number of axes of symmetry. If it has rotation symmetry, state the angle of rotation. For each type of

*asked on October 17, 2014* -
## engineering mechanics

the greatest and least resultant of two forces are respectively 17 KN and 5 KN. determine the angle between two force when their resultant is root 144 KN.

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

the average placement test score of a sample of 64 students out of 1000 registered at a community college is 70 with a standard deviation of 15. Construct a confidence interval with a 5% chance of error.

*asked on April 6, 2014* -
## Physics

A 26.2 g marble sliding to the right at 62.0 cm/s overtakes and collides elastically with a 13.1 g marble moving in the same direction at 15.5 cm/s. After the collision, the 13.1 g marble moves to the right at 77.5 cm/s. Find the velocity of the 26.2 g

*asked on January 8, 2014* -
## physics

You walk 51 m to the north, then turn 30° to your right and walk another 45 m. How far are you from where you originally started?

*asked on November 14, 2013* -
## physics

a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second.

*asked on November 2, 2013* -
## health

Whats the largest bone in your body?

*asked on October 16, 2013* -
## Calculus

Finf (dy/dx) y=(1+28x^3)f(x)+(6x)g(x)(x^4+5x+7)+(6x)g(x)(x^4+5x+7)-(e^x+7x^4)f(x)+3x^2g(x)(4x^3+5+7)/((x^4+5x+7)^2

*asked on October 6, 2013* -
## stats

suppose that a population of people is 1200. .25 of the population is white. we take a random sample of 100 people. What is the probabilit that more than .29 of these people are white?

*asked on April 16, 2013* -
## Chemistry

What preperation produces a 2.0 Mole solution of C6H12O6? a) 90.0 grams of C6H12O6 dissolved in 500.0 mL of solution b) 180.0 grams of C6H12O6 dissolved in 1000mL of solution c) 90 Grams of C6H12O6 dissolved in 1000mL of solution D) 180.0 Grams of C6H12O6

*asked on December 19, 2012* -
## Physics

A baseball (m = 135 g) approaches a bat horizontally at a speed of 40.4 m/s (90 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the ball by

*asked on November 18, 2012* -
## Physics

The drawing shows a circus clown who weighs 710 N. The coefficient of static friction between the clown's feet and the ground is 0.49. He pulls vertically downward on a rope that passes around three pulleys and is tied around his feet. What is the minimum

*asked on October 25, 2012* -
## statistics

In a survey of 400 college students, 40 were left-handed. Treating the sample as if it were random and using 0.015 as the standard deviation of the sampling distribution of the sample proportion, what is the lower bound of a 95% confidence interval for the

*asked on May 18, 2012* -
## World Civ

What were the social and administrative foundations of the absolute power of Ming Quing emperors?

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

Jake says that adding 0 does not change a sum. Is he correct? explain.

*asked on September 20, 2011* -
## Chemistry

When 1.0 g of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mL a) How many megajoules are released when 3.0 of gasoline burns? b) If a television requires 150 kJ/h to run, how many hours can the television run on the energy

*asked on September 12, 2011* -
## Chemistry

A sample of 0.43 moles of a metal M reacts completely with excess chlorine to form 18.23 grams of MCl. How many moles of Cl are in the sample of MCl that forms?

*asked on July 30, 2011* -
## calculus

A missile is fired at an angle of 75 from the horizontal. At one point, its speed was 900 mph. Find its horizontal velocity in miles per minute

*asked on April 1, 2011* -
## Physics Mechanics

A banked circular highway curve is designed for traffic moving at 57 km/h. The radius of the curve is 211 m. Traffic is moving along the highway at 48 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow

*asked on February 20, 2011* -
## chemistry

Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine

*asked on December 31, 2010* -
## chemistry

Which of the following properties increase with increasing atomic number for fluorine and chlorine? I. melting point of the elements (yes) II. boiling point of the hydrogen halides i'm not sure about II because HF has the highest boiling point but fluorine

*asked on December 31, 2010* -
## chemistry

At 100 degrees celsius, the ratio of the average kinetic energy of oxygen molecules, O2, to the average kinetic energy of methane molecules, CH4, is: A) 4:1 B) 1:4 C) 1:2 D) 1:1 I think it's D because the kelvin temperature is the same for both collection

*asked on December 31, 2010* -
## algebra

how can 2 boys weighing 100lbs each and a man weighing 200lbs cross the river in a boat that only holds 200lbs safely?

*asked on November 20, 2010* -
## Calculus

A particle moves in a straight line with velocity t^-2 - 1/9 ft/s. Find the total displacement and total distance traveled over the time interval [1,4]. I found out that the total displacement is .4116 But I cannot find the total distance traveled.

*asked on November 11, 2010* -
## AP Chemistry

What is the Dumas Method in regards to the molas mass of a gas?

*asked on November 4, 2010* -
## Chem

5. The LC50 for fluorine is 0.29 mg/m3. What is this in ppm at 25 oC and 1 atm pressure? How does this compare to the PEL?

*asked on October 17, 2010* -
## College Chem

How many liters of carbon dioxide at 20 oC and 750 torr are produced when one gallon of toluene is burned? C7H8 + 9O2 ==> 7CO2 + 4H2O 1 gallon toluene = about 3,785 mL density = about 0.867 g/mL mass toluene = 3785 mL x 0.867 g/mL = 3282 grams. moles

*asked on October 4, 2010* -
## Fundamentals of Cost Analysis (Economic Analysis)

What would be the present value of an item that has a salvage value of $25,000 at the end of five years? Assume a discount rate of 3.8% for an end-of-year factor. Carry calculations to four decimal places.

*asked on August 19, 2010* -
## home economic

Which of the following gadgets is best for making a soft-shell shape out of butter? A. A curler C. A masher B. A peeler D. A pick

*asked on July 13, 2010* -
## begining algebra

One side of a triangle is three times the shortest side. The third side is 7 feet more than the shortest side. The perimeter is 62 feet. Find all three sides.

*asked on February 10, 2010* -
## Criminal Justice 200

What are the steps to take for pretrail?

*asked on December 13, 2008* -
## Criminal Justice 200

What would a person consider two main functions of criminal law. How can you identify one justification and excuse defense?

*asked on November 30, 2008* -
## CHEM

How do I work the following question? I found the amu of CaCO3=101.0872g/mol; 2HCL=72.92128g/mol; H2O=18.1582g/mol;CO2=44.0098g/mol; and, CaCl2=110.9834g/mol. You carefully weigh out 10.00g of powder and add it to 40.50g of solution. You notice bubbles as

*asked on October 1, 2007* -
## Math

5+2

*asked on April 23, 2020* -
## Math

Given the proportion a/b =8/15, what ratio completes the equivalent proportion a/8 =? How do I do this?

*asked on May 27, 2019* -
## health

what is an inflammation of the mucous membrane if the bronchial tubes caused by smoking

*asked on May 7, 2019* -
## Sociology

So I am genuinely interested in what other people's opinions are on how racial discrimination might affect economic stratification in the US?

*asked on April 14, 2019* -
## Spanish

What are least two different ways you can ask what you or someone is like in Spanish?

*asked on October 2, 2018* -
## Photographer

Describe the post secondary training or education required for that field.... what does that mean? What are some examples?

*asked on May 25, 2018* -
## English Research Paper *Edit*

What does everyone think of these questions: What are the positive effects music has on the mind? Can those positive effects change a mindset on something / the way you think? Can music calm the mind? After a bad day, or even deescalate a situation. How

*asked on May 24, 2018* -
## History

One of the impulses of the constitution of 1845 a physical responsibility Former slaves importance of high taxes increase state debt Why was he Texas her station of 1845 twice as long as the one written before it select only two it decreased a large number

*asked on April 24, 2018* -
## Math (3 of 3) *Final*

8. Factor 5t² - t -18 9. Factor 25x² - 9 10. Factor 9t² + 12t + 4

*asked on April 2, 2018* -
## Math (2 of 3)

4. Find the GCF of the polynomial, then factor. 8v⁶ + 2v⁵ - 10v⁹ 5. Simplify the product of the binomial [5t + 4]² 6. A rectangle has dimensions 3x 1 and 2x + 5. Write an expression for the area of the rectangle as a product and in standard

*asked on April 2, 2018* -
## Math (1 of 3)

1. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms [5x³ + 3x² - 7x + 10] + [3x³ - x² + 4x - 1] 2. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. [9w -

*asked on April 2, 2018* -
## Mathematics 1 of 3

1. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (5x^3 + 3x^2 - 7x + 10) - (3x^3 - x^2 + 4x - 1) 2. Simplify and write in standard form. Then, classify the polynomial by degree and number of terms. (9w -

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

Determine if the number is written in scientific notation. If not, explain; 3 x 100⁻⁶. A. No; it is not written as a power of 10. B. No; the first factor is not a number between 1 and 10. C. Yes; the number is written in scientific notation. I'm almost

*asked on March 14, 2018* -
## Math

How would I do these? 6. The speed of sound is approximately 1.2 × 10³ km/h. How long does it take for sound to travel 7.2 × 10² km? Write your answer in minutes. 7. Evaluate the function below over the domain {-1, 0, 1, 2}. As the values of the domain

*asked on March 5, 2018* -
## Science (Last question of these)

Ball A, with a mass of 10kg, is moving to the right at 20 m/s. Ball B is moving to the left at 20 m/s. Upon collision, Ball B comes to a standstill, and Ball A moves to the left at twice its original speed. What is the mass of ball B? How do I do this?

*asked on February 28, 2018* -
## Science

Ball B, with a mass of 30kg, is moving to the left at 10 m/s. With what velocity should Ball A, with a mass of 10kg, move to the right and collide with 2, so that ball A rebounds with a velocity of 30 m/s, and Ball B with velocity of 10 m/s, after the

*asked on February 28, 2018* -
## Science

Ball A, with a mass of 20 kg, is moving to the right at 20 m/s. At what velocity should Ball B, with a mass of 40 kg, move so that they both come to a standstill upon collision? How do I solve this?

*asked on February 28, 2018* -
## chemitry

Liquid sodium is being considered as an engine coolant. how many grams of liquid sodium (minimum)are needed to absorb 3.60 MJ of energy(in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 degree celcius? use Cp=30.8

*asked on January 24, 2018* -
## social studes

Which of the following was not a sign of the breakdown of royal government in Georgia?

*asked on November 22, 2017* -
## MATH PLZ HELP

Simplify the expression: 15 − 3[2 + 6(−3)]

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

PLEASE DO NOT THINK I AM CHEATING AND ASKING FOR ANSWERS. DO NOT LECTURE ME, I AM SIMPLY ASKING WHAT IN THE HELL THIS MEANS: Collecting and Analyzing Data There are two types of observations: qualitative and quantitative. Qualitative observations use words

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

If centripetal force acts towards the center of a circle, why do we get pushed to the outside of the circular path when rounding a curve? What is responsible for this sensation? Some have erroneously referred to this sensation as a centrifugal force. What

*asked on June 20, 2017* -
## math

As part of a school science project, Jacob bought some bulbs for a total of $18. The cost of each bulb was $3. How many bulbs did Jacob buy? Write an equation with a variable and state what the variable represents.

*asked on May 24, 2017* -
## ELA plez help

what statement is true about dialogue? 1.The words each character says are enclosed by quotation marks 2. the words each character says appear next to the characters name. 3. The words that the main character says appear in italics or brackets 4. the words

*asked on March 14, 2017* -
## physics

A crate with a mass of (111.5) kg is lifted by a crane. If the crate is accelerating upward at (2.7) m/s2, what is the tension in the cable? Give your answer in newtons (N) and with 3 significant figures.

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

If a water bottle holds 1.5 litters of water if I open a new bottle an drink half how much water is left

*asked on January 26, 2017* -
## finance

the school you would like to attend costs 100,000, to help finance your education you need to choose whether or not to sell your 1000 shares of Apple stock , 1000EE Savings Bonds (with denominations and 4.25% coupon rate) that are five years from their

*asked on December 20, 2016* -
## Algebra 1- Urgent

Part A: Sam rented a boat at $225 for 2 days. If he rents the same boat for 5 days, he has to pay a total rent of $480. Write an equation in the standard form to represent the total rent (y) that Sam has to pay for renting the boat for x days. (4 points)

*asked on December 17, 2016* -
## Trigonometry

a line which passes through the origin contains point A (-0.714, 0.700) . find the gradient of the line and the angle formed with respect to the positive x-axis in Degrees

*asked on March 30, 2016* -
## physics

Find the time constant (T) for the RC circuit with an open switch given t = 10 ms 50% of Qmax charge T = ? Q = CV (1-e -t/T)

*asked on February 25, 2016* -
## english

bad impact on their lifestyle give me a better word then bad please

*asked on January 19, 2016* -
## Chemistry

Pb + S yield FeS

*asked on November 1, 2015*