Wednesday

February 22, 2017
Total # Posts: 1,399

**Physics**

A cyclist and his bicycle have a combined mass of 55kg. Total area of the tyres in contact with the road is 2.2 times (10 minus power of 3) in contact with pressure exerted by the two on the ground.

*February 15, 2017*

**Physics**

A cyclist and his bicycle have a combined mass of 55kg. Total area of the tyres in contact with the road is 2.2 in contact with pressure exerted by the two on the ground.

*February 15, 2017*

**Physical Science**

An elephant drags a tree trunk along a rough horizontal surface by means of an attached rope which makes an angle of 30° with the horizontal. The force in the rope is 4 000N. CALCULATE the horizontal component of the force exerted by the rope on the tree trunk

*February 14, 2017*

**Algebra **

Identify the property that justifies the statement (5+7)6=30+42 Would this be the distributive property or Inverse Prop of Multi? Kind of confused Thank you

*February 13, 2017*

**Algebra **

Set up and solve a system of equations The school that Joe goes to is selling tickets to a spring musical. On the first day of ticket sales the school sold 12 adult tickets and 2 child for a total of $122. The school took $160 on the second day by selling 7 adult tickets and 8...

*February 12, 2017*

**math**

A construction company needs to remove 416 tons of dirt from a construction site. They can remove 89 tons of dirt each hour. What is the total number of hours it will take to remove the dirt?

*January 24, 2017*

**calculus**

A 17- foot ladder is leaning against a wall, and begins to slide. The top of the ladder is falling at a rate of 2 feet per second at the instant that the bottom of the ladder is 8 feet from the wall. What is the rate of change of the distance between the bottom of the ladder ...

*January 22, 2017*

**Calculus**

Does F(x)=9-x^2 satisfy the hypothesis of the mean value theorem on the interval [0,3]? if it does, then find the exact values of all Ce(0,3) that satisfy the conclusion of the Mean Value Theorem.

*January 22, 2017*

**calculus**

how do you find the derivative of this (-x^2)/ (2) +2 and does it have any x intercepts, asypmtotes, or holes.

*January 18, 2017*

**Calculus**

How do you fine the derivative of (x-3)^-3

*January 18, 2017*

**Physical Science**

If element x is neutral then it will also have 81 electrons.

*January 11, 2017*

**calculus**

how do I graph this using the first and second derivative and three sign charts. i have to label the inflection point, extreme values and the intercepts also. f(x)= x^3-6x^2

*January 8, 2017*

**calculus**

is 188.5 inch/sec. correct?

*January 8, 2017*

**calculus**

Water leaking onto a floor creates a circular pool with an area that increases at the rate of 3 square inches per minute. How fast is the radius of the pool increasing when the radius is 10 inches?

*January 8, 2017*

**Calculus**

use implicit differentiation to find dy/dx if 5xy+x^2y=10 Is this correct answer for this question (-5y-2xy)/(12x)

*January 6, 2017*

**calculus**

find the equation of the tangent line to the graph of -x^2+2y^2+3x=-2 at the points with x-coordinates x=4

*January 5, 2017*

**calculus**

use implicit differentiation to find dy/dx if 5xy+x^2y=10

*January 5, 2017*

**calculus**

Use the definition of derivative: lim(as h approaches 0) (f(x+h)-f(x)/(h) to find f(x)=(1)/(2x).

*January 5, 2017*

**calculus**

f'(-2) if f(x)= g(h(x))^3 Chart x= -3,-2,-1,0,1,2,3 g(x)= 0,1,3,2,0,-2,-3 h(x)= 1,2,0,3,-1,-2,0 g'(x)= 1,2,-1,-2,-2,-1,0 h'(x)= 0,-3,-2,3,-2,0,1

*January 5, 2017*

**Calculus**

Find f'(1) if f(x)=(h(x))^3 Chart: x= -3,-2,-1,0,1,2,3 g(x)= 0,1,3,2,0,-2,-3 h(x)= 1,2,0,3,-1,-2,0 g'(x)= 1,2,-1,-2,-2,-1,0 h'(x)= 0,-3,-2,3,-2,0,1

*January 5, 2017*

**calculus**

when a circular plate of metal is heated in an oven, its radius increases at the rate of 0.01 cm/min. At what rate is the plate's area increasing when the radius is 60 cm?

*December 21, 2016*

**calculus**

A 13 foot ladder is leaning against a house when its base starts to slide away. By the time the base is 12 ft. from the house, the base is moving at the rate of 10ft./s. How fast is the top of the ladder sliding down the wall then?

*December 21, 2016*

**calculus**

A Veterinarian has 80 feet of fence and he wants to enclose a rectangular dog-run along the back side of his office building. He will not fence the side along the building. What are the dimensions of the dog-run that give the maximum area he desires?

*December 21, 2016*

**calculus**

Jen needs to make a flyer for her dog's birthday party. She wants the flyer to contain 40 square inches of printed portion and she wants to use 1 inch of each side as well as 2 inches of top and bottom of the paper for decoration. What size paper should Jen choose in order...

*December 21, 2016*

**calculus**

find the location and values of any global extrema of F(x)= x^3-3x^2-9x on the interval [-2,4] (you must show your work by finding critical points

*December 21, 2016*

**calculus**

Find two numbers whose product is 16 and whose sum of squares is minimum

*December 21, 2016*

**Algebra**

a cheese pizza cost $8.75 each additional cost topping costs $1.25. if you order one pizza and have $12.50. how many toppings can you have on the pizza.

*December 8, 2016*

**Algebra**

8-3/4c=5

*December 2, 2016*

**Algebra**

8-3/4c=5

*December 2, 2016*

**Math**

8-3/4c=5

*December 2, 2016*

**Math**

A taxicab charges $2.50,plus$1.78 per kilometer. How long is a trip that costs 21.19?

*December 2, 2016*

**Math**

A cookie recipe calls for 2-3/4 cups of flour and 1-1/4 cups of sugar. If the amount of the ingredients are increased proportionally, and the amount of sugar is increased to 10 cups, how many cups of flour would be needed?

*December 1, 2016*

**science**

Provide at least three examples of real-world applications in use or in development with reliable references.

*November 26, 2016*

**science**

Discuss current or future applications of nanotechnology in fields such as medicine, engineering, space exploration, fuel cell development, air and water purification, and agriculture.

*November 26, 2016*

**science**

Discuss how materials science has advanced to the stage where materials can be engineered to fit a specific purpose.

*November 26, 2016*

**science**

Provide an example of an application or object that is made of materials specifically engineered for that purpose.

*November 26, 2016*

**science**

Discuss scientific and technical concepts related to materials science for plastics

*November 26, 2016*

**Chemistry**

Write a balanced overall reaction from these unbalanced half-reactions. Sn->Sn2+ Ag+->Ag Balanced overall equation I got Sn+2Ag+->Sn+2Ag, but its wrong.

*November 20, 2016*

**chemistry**

Suppose f??(x)=?36sin(6x) and f?(0)=?5, and f(0)=?3 f(?/3)=?

*November 18, 2016*

**chemistry**

Suppose f??(x)=?36sin(6x) and f?(0)=?5, and f(0)=?3 f(?/3)=?

*November 18, 2016*

**Chemistry**

An unknown metal has a mass of 4.67g. It is heated to 95.1 C and then placed in a calorimeter that contains 24.3g of water at 21.7 C. The metal and water both reach a final temperature of 24.6 C. What is the specific heat of this metal? What is the unknown metal? Q=mcdeltaT c=...

*November 16, 2016*

**chemistry**

Suppose 5 ? f(x)dx=6 ? 2 3 ? f(x)dx=1 ? 2 5 ? f(x)dx=4 ? 4 4 ? (6f(x)?1)dx= ? ? 3 help, please? I got the answer of 5, but it says its wrong

*November 11, 2016*

**Grammer**

I don't know

*October 17, 2016*

**math**

identify the situation that each graph could represent

*October 16, 2016*

**math**

find the function rule x -2 -1 0 1 2 y 9 4 -1 -6 -11

*October 15, 2016*

**Calc I (@Reiny)**

@Damon, Not sure why, but my post was posted twice. But I saw her response, thank you !

*October 10, 2016*

**Calc I (@Reiny)**

y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3 Plug x ...

*October 10, 2016*

**Calc I (@Reiny)**

@Reiny, Thanks again!

*October 10, 2016*

**Calc I (@Reiny)**

y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I used Reiny's way to help solve this answer. Please check if I've done it correct: y'= 3x^2-16x+6 3x^2-16x+6=6 3x^2-16x=0 x(3x-16)=0 Solve for x's x=0 3x-16=0 ~> x=16/3 Plug x ...

*October 10, 2016*

**English**

5. Would be incorrect

*October 10, 2016*

**Calculus I**

*** wait. I mean x(3x-16)=0, I'm not sure what's wrong with my eyes. But I will try to figure out how to do it now. Thank you again

*October 10, 2016*

**Calculus I**

Thanks for your help! But wouldn't the derivative be y'=3x^2-16x+6 not 3x^2-15x+6? Then I'll have x(3x-16x)=0 x=0 3x-16x=0 ~> -15x=0 , x=0 I'm confused even more now...

*October 10, 2016*

**Calculus I**

y = x^3 - 8x^2 + 6x -2 has a slope of 6 at two points, what are the coordinates? I did the power rule to derive the equation: y'= 3x^2 - 8x + 6 , and then I tried to factor it to find the x intercepts but it doesn't work. But anyway, my point of confusion is where does...

*October 10, 2016*

**chemistry**

The formula for sulphuric acid is H2SO4. So, first you add up the masses of all the components in the formula. 2 hydrogens = 1u * 2 = 2u + 1 sulphur = 32u + 4 oxygens = 16u * 4 = 64u = 98u 98u is the mass of the compound, I'm not sure which element you are trying to find ...

*September 28, 2016*

**english**

There is a text named Adolescent Confusion by Maya Angelou, and I have to write a paragraph about : Most teenagers are, at times, as impulsive and unthinking as Angelou was. Write a narrative about a time during your teenage years when you did something impulsively ,with ...

*September 24, 2016*

**algebra 1**

list from least to greatest square root 7, square root 3,-0.3,-7/4,0.1

*September 20, 2016*

**physics**

A particle B of mass 10g is shot vertically upward from a point O with velocity 10m/s. The horizontal plane containing O is the reference level of the gravitational potential energy .Neglect all air effects. a) Calculate the mechanical energy of the system at O. b) Calculate ...

*September 19, 2016*

**Communication Arts**

Thank you!

*September 2, 2016*

**Communication Arts**

Viewed through a telescope, the planet Mars looks rust-red because rust is a large component of its soil. Is this proper grammar??

*September 2, 2016*

**Communication Arts**

Oh, okay. Thank you!

*September 2, 2016*

**Communication Arts**

THANK YOU SO MUCH!

*September 2, 2016*

**Communication Arts**

Grammar check please!!! Georgia O'Keefe was an American painter from Wisconsin. Whose detailed close-ups of flowers brought her world renown.

*September 2, 2016*

**Math**

If 18 gallons of gas costs X dollars what is the expression to represent the cost in dollars of 3 gallons

*July 13, 2016*

**Algebra**

the width w of a rectangular swimming pool is x-2. The area of the playground is x^3-5x^2+2x+8. What is an expression for the length of the playground. x^2+3x+4 x^2+3x-4 x^2-3x+4 x^2-3x-4

*June 2, 2016*

**algebra 1**

Use the following statement to answer parts a) and b). One hundred raffle tickets are sold for $3 each. One prize is to be awarded. Raul purchases one ticket. a). Determine his expected value. b). The fair price of a ticket is?

*May 25, 2016*

**algebra**

A survey of 70 Customers was taken at a bookstore regarding the types of books purchased. The survey found that 42 customers purchased mysteries, 34 purchased science fiction, 24 purchased romance novels, 18 purchased mysteries and science fiction, 12 purchased mysteries and ...

*May 25, 2016*

**physics**

got it! thank you so much!!

*May 13, 2016*

**physics**

when I solve for that, i got -8.5 which can't be possible seeing the car started at 13. did i do something wrong?

*May 13, 2016*

**physics**

what about a 5,000 kg truck rear-ends a 1200 kg car that has been traveling at 13 m/s, causing the truck to slow down from 14 m/s to 12 m/s and the car to speed up. What is the final velocity?

*May 13, 2016*

**physics**

I need so much help, thanks in advance! Determine the gravitational energy of your 3kg physics binder a) relative to the table it sits on b) relative to the floor, 0.68 meters below the book c) relative to the floor 2.5 meters above the book

*May 13, 2016*

**physics**

reposted- sorry for the confusion and thanks of the help

*May 13, 2016*

**physics**

Final velocity of the car that is

*May 13, 2016*

**physics**

what about a 5,000 kg truck rear-ends a 1200 kg car that has been traveling at 13 m/s, causing the truck to slow down and the car to speed up. What is the final velocity?

*May 13, 2016*

**physics**

Two trains approach one another. Train A has a mass of 500,00 kg and is moving at 34.0 m/s. Train B has a mass of 350,00 kg and is moving at 42 m/s. They collide and stick together. What is the velocity and direction of the combined masses

*May 13, 2016*

**physics**

understood thanks! i was overlooking the opposite direction

*May 13, 2016*

**physics**

why do you add the 40 and 64...should you not calculate the change in them?

*May 13, 2016*

**physics**

thank you!

*May 13, 2016*

**physics**

A bat exerts force of 755N on a 320g ball that approaches the bat at 40 m/s and leaves at 64 m/s. How long was the ball in contact with the bat?

*May 13, 2016*

**math**

Kate Davidson signed a simple discount note for $9,000. The discount rate is 5%, and the term of the note is 18 months. What is the annual percentage yield (APY)?

*May 6, 2016*

**math**

Israel signed a simple discount promissory note for $15,000. The discount rate is 7.5%, and the term of the note is 120 days. What are Israel’s proceeds on the loan?

*May 6, 2016*

**math**

Alicia borrowed $8,500 at 6% ordinary interest for 180 days. After 40 days, she made a partial payment of $2,000. After another 70 days, Alicia made a second partial payment of $2,000. What is the final amount due on the loan?

*May 6, 2016*

**math**

Webster Digital received a promissory note of $8,000 for 9 months at 7% simple interest from one of its customers. After 4 months, the note was discounted at Bank of Aventura at a discount rate of 10%. What are the proceeds Webster Digital will receive from the discounted note?

*May 6, 2016*

**math**

What is the annual percentage yield (APY) of a simple discount note for $7,000 at a bank discount rate of 6%, for 3 months?

*May 6, 2016*

**Common Core Math7**

28

*May 5, 2016*

**algebra**

the base of a triangle is (c+2) ft and the area is (2c^3+16) ft^2. what is the height? please help me i don't understand how to solve for the height.

*May 4, 2016*

**Math**

what fraction of a pizza remains if Joe ate 4/5 of 1/2 a pizza

*April 27, 2016*

**American History please Help**

The influx of new immigrants in the 1980s and 1990s motivated many native-born Americans to A.campaign to make English their state’s official language. B.push for bilingual education programs in public schools C.boycott businesses that gave jobs to illegal immigrants. D. ...

*April 22, 2016*

**American History**

The results of the 2000 presidential election were difficult to determine because of A,Ralph Nader’s third-party candidacy b.both candidates being baby boomers c.voting irregularities in the state of Florida D.he Electoral College votes being evenly split. my answer is C ...

*April 22, 2016*

**American History please Help**

The initial impact of containment theory on Truman’s foreign policy can be seen in the president’s A,relationship with Yugoslavia’s Josip Tito. B.decision to intervene in the Greek civil war C,efforts to break the blockade of West Germany. D,offer to let the ...

*April 20, 2016*

**Us history**

provided financial support to state and local governments and made loans to banks, railroads, mortgage associations and other businesses.

*April 20, 2016*

**American History**

Both Richard Nixon and Joseph McCarthy advanced their careers by A.Accusing political opponents of being Communist collaborators. B, Serving on the HUAC C, practicing the “multiple untruth” approach to interviewing witnesses D,collecting and publicizing the names of ...

*April 20, 2016*

**American History**

Joseph Stalin was motivated to sign a nonaggression pact with Hitler. A,the Soviets’ need for economic and military aid B.Stalin’s desire to gain control of Eastern Europe c.Stalin’s sense that he needed to preempt a Nazi invasion. D.The need for an ally given ...

*April 17, 2016*

**American History**

The decision by Great Britain and France to sign the Munich Accord with Germany was considered an act of. A,isolationism b.internationalism. C.appeasement d.neutrality. My answer is B

*April 17, 2016*

**American History**

In the 1865 Mississippi Black Code what was the contracted penalty for intermarriage between a free negro and a white person? A .State annulment of the marriage B.Ten years in prison C.Life in prison D.The death penalty my answer is A

*April 16, 2016*

**American History**

The economy rebounded in 1897 due to the A. economic policies of President McKinley. B.withdrawal of the Populists from national politics C.discovery of gold in Alaska D. Decline of the general price index. My answer is A

*April 16, 2016*

**Economics**

You buy 100 shares of stock at $4.00 per share. You receive one dividend of 10 cents per share. You sell the stock 1 year later for $5.50 per share. The fee for selling the stock is $15.00. What is the total profit you made on the entire transaction?

*April 11, 2016*

**Economics**

You have a credit card that charges 18% per year interest or 1.5% per month . You buy a tv for $1000 on the credit card but at the end of the month you only pay $100. You continue to pay $100 the next month. You pay the entire balance in the third month. How much total ...

*April 11, 2016*

**American History**

Need help on one more question Which region of the country was a beneficiary of deindustrialization during the 1970s? A. Northwest B. midwest C. Southwest . D Northeast My answer is D.

*April 9, 2016*

**American History**

I answer is with C after looking at the text a little deeper and it was correct

*April 9, 2016*

**American History**

The goal of President Nixon’s foreign policy was to A.uphold democratic values and contain communism through the use of military force B.prevent South Vietnam from falling to communism, whatever the cost in American lives. C.achieve a stable balance of power among the ...

*April 9, 2016*