# Posts by ANGIE

Total # Posts: 1,419

**math**

A railroad tunnel is shaped like a semi-eclipse. The height of the tunnel is 28ft and the total width is 50ft. Find the vertical clearance at a point 13ft to the right from the center. Please show all work that leads to your answer. Round your final answer to the nearest tenth.

**Math**

thank you so much..

**Math**

my answer is $30.00 hourly rate 24.00/0.8=30 am i right?

**Math**

I did $24.00 minus 20% and my answer is $19.20

**Math**

An accountant currently charges an hourly rate of $24. That is 20% less than she used to bill. What was her previous hourly rate? $ my answer is $19.20 am i right

**Math**

im not sure 5,784 im sure

**Math**

578436

**Math **

Dover's current population is 5,074 residents, which is 14% smaller than at the time of its founding. What was the population of Dover back then? I'm sorry, there's another question on IXL I need some help on, I'm just wondering if I'm right, am I? First I ...

**Math**

Ohh I see, thank you!

**Math **

The current population of Summerfield is 16,359 people, which is 90% larger than when David moved there. What was the population of Summerfield back then? I need some help, there's this question on IXL (It's a website that has math problems for you to answer) that I ...

**College Math**

Draw a venn Diagram to illustrate the education level of Smokers Non Smokers and people who never smoked. Use the table below Education Smokers Former Never Total College Degree 12 9 41 62 H.S. Grad 9 10 22 41 Did not grad 9 3 4 16 Total 20 22 67 119

**Math **

2 cups of sugar is needed for 12 cupcakes. How many cups of sugar for 4 cupcakes? I can figure out how many for 24 cupcakes and 6 cupcakes but not the 4 or 9 cupcakes.

**Physical Science**

What is the relationship between the temperature of a star and the spectrum of the star?

**Math**

Megan answered 18 questions correctly on a test. That is 75 percent of the total number of questions. How many questions were on the test?

**Chemistry**

carbon disulfide is prepared by heating sulfur and charcoal. the chemical equation is S2(g)+C(S)=CS2(g) and Kc = 9.4 at 900K. How many grams of CS2(g) can be prepared by heating 8.9moles of S2(g) with excess carbon in a 5.00L reaction vessel held at 900K until equilibrium is ...

**Program Design and Development **

Help on Design a class named Book that holds a stock number, author, title, price, and number of pages for a book. Include methods to get and set the values for each data field. Write the pseudocode that defines the class?

**Astronomy**

The gravity lock of the Moon to Earth is silimar to the action of a A) giant pendulum B) spinning top C) master key D) tidal wave E) magnetic compass I'm torn between A and E.

**Rpcc**

You throw a ball horizontally off a building with a horontal velocity of 10 m/s. What is the ball's horontal velocity 5 seconds later? What is the ball's vertical velocity 5 seconds later?

**ENGLISH**

Which form best describes this poem? narrative poem haiku free verse lyric poem

**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.

**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.

**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

**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

**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...

**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?

**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 ...

**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.

**calculus**

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

**Calculus**

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

**Physical Science**

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

**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

**calculus**

is 188.5 inch/sec. correct?

**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?

**Calculus**

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

**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

**calculus**

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

**calculus**

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

**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

**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

**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?

**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?

**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?

**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...

**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

**calculus**

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

**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.

**Algebra**

8-3/4c=5

**Algebra**

8-3/4c=5

**Math**

8-3/4c=5

**Math**

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

**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?

**science**

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

**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.

**science**

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

**science**

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

**science**

Discuss scientific and technical concepts related to materials science for plastics

**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.

**chemistry**

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

**chemistry**

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

**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=...

**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

**math**

identify the situation that each graph could represent

**math**

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

**Calc I (@Reiny)**

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

**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 ...

**Calc I (@Reiny)**

@Reiny, Thanks again!

**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 ...

**English**

5. Would be incorrect

**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

**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...

**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...

**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 ...

**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 ...

**algebra 1**

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

**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 ...

**Communication Arts**

Thank you!

**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??

**Communication Arts**

Oh, okay. Thank you!

**Communication Arts**

THANK YOU SO MUCH!

**Communication Arts**

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

**Math**

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

**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

**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?

**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 ...

**physics**

got it! thank you so much!!

**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?

**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?

**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

**physics**

reposted- sorry for the confusion and thanks of the help

**physics**

Final velocity of the car that is

**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?

**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

**physics**

understood thanks! i was overlooking the opposite direction

**physics**

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

**physics**

thank you!

**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?

**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)?

**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?

**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?

**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?