Thursday

September 3, 2015
Total # Posts: 1,470

**math**

Please explain how to solve: A circular table is painted yellow with a red square in the middle. The radius of the tabletop is 6x. The side length of the red square is 3x. What is the area of the yellow part of the tabletop? Write your answer in factored form.
*January 25, 2012*

**Math**

Please explain to me how to solve: A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.
*January 25, 2012*

**basic math**

I need to convert 40mg/mL to 5mg/mL with distilled water. How much distilled water would I use to do this?
*January 24, 2012*

**Math**

Please show me how to solve: Doctors can use radioactive iodine to treat some forms of cancer. The half-life of iodine - 131 is 8 days. A patient receives a treatment of 12 millicuries of iodine - 131. (A mullicurie is a unit of radioactivity.) How much iodine - 131 remains in...
*January 22, 2012*

**Math**

Hydra are small freshwater animals. They can double in number every two days in a laboratory tank. Suppose one tank has an initial population of 60 hydra. When will there be more than 5000 hydra? How can a table help you identify a pattern? What function models the situation...
*January 21, 2012*

**math**

Hydra are small freshwater animals. They can double in number every two days in a laboratory tank. Suppose one tank has an initial population of 60 hydra. When will there be more than 5000 hydra? How can a table help you identify a pattern? What function models the situation (...
*January 21, 2012*

**social studies**

who was the 8th US president
*January 19, 2012*

**math**

what is the square of 13
*January 18, 2012*

**math**

I've just begun to study Exponential functions: When you make a table starting with: -2 -4^x What are my coordinates? -1 0 1 2
*January 18, 2012*

**Alg. I**

I've just begun to study Exponential functions: When you make a table starting with: -2 -4^x What are my coordinates? -1 0 1 2
*January 18, 2012*

**math**

Finding a break-even point: How do I set up the equation and solve? Producing a musical costs $88,000 plus $59,000 per performance. One sold-out performance earns $7500 in revenue. If every performance sells out, how many performances are needed to break even?
*January 10, 2012*

**math**

Sorry, Reiny, I copied the 2nd choice incorrectly. I had posted this problem with you before and the answer given that was not equalalent to A=1/2/bh was 2b =A/h. The problem is: A = 1/2bh, which is not equivalent? Choices: 2A =bh, h=2A/b, 2b=A/h, b=2A/h When I got my test ...
*January 10, 2012*

**math**

A recipe for trail mix calls for 3 cups of raisins and 2 cups of peanuts. If you plan on using 15 cups of raisins, how many cups of peanuts do you need?
*January 10, 2012*

**Math**

I had posted this problem with you before and the answer given was 2b =A/h. The problem is: A = 1/2bh, which is not correct? Choices: 2A =bh, b=2A/b, 2b=A/h, b=2A/h When I got my test back 2b=A/h was correct. Did I make a mistake or was their answer incorrect?
*January 10, 2012*

**Algebra I**

Exponential Function. Please show me how to solve: g(t) = -0.5 x 4w (that is 4 to the power of w) w=18
*January 8, 2012*

**Math**

Which equation is not equivalent to A = 1/2bh 2A=bh h=2A/b 2b=A/h b=2A/h I think it is 2b=A/h. Is this correct?
*January 7, 2012*

**Math**

The Venn diagram below shows the dinner orders for a local restaurant. This was submitted before, but no one answered. Thanks! How many people did NOT order steak for dinner? Steak, chicken & fish were order. In the Venn circles, the total that did not order steak was 56. ...
*January 7, 2012*

**math**

The Venn diagram below shows the dinner orders for a local restaurant. How many people did NOT order steak for dinner? Steak, chicken & fish were order. In the Venn circles, the total that did not order steak was 56. There is 43 in the right lower corner of the rectangle that ...
*January 6, 2012*

**math**

Please explain how to solve: You have 11 cups of flour. It takes 1 cup of flour to make 24 cookies. The function c(f) = 24f represents the number of cookies, c, that can be made with f cups of flour. What domain and range are reasonable for the function? My choices are: Domain...
*January 6, 2012*

**Math**

Given A = {2,4,6,8,10} B= {1,2,3,4,5,6,7,8,9,10} What is (A¿B) ? Is it {2,4,6,8,10}?
*January 6, 2012*

**Math**

Please explain how to solve: 1/3 = p-2/p+8
*January 6, 2012*

**Math**

What equation do you get when you solve for x? -g = sx I got -g/s = x. Is this correct?
*January 5, 2012*

**Math**

You have 11 cups of flour. It takes 1 cup of flour to make 24 cookies. The function c(f) = 24f represents the number of cookies, c, that can be made with f cups of flour. What domain and range are reasonable for the function?
*January 5, 2012*

**Math**

Sorry about the symbols before. Admission to the fair costs $7.75. Each ride costs you $0.50. You have $15 to spend at the fair including admission. Which inequality represents the number of rides you can ride? r ¡Ý 15 (r is more than or equal to 15) r ¡&...
*January 5, 2012*

**Math**

Admission to the fair costs $7.75. Each ride costs you $0.50. You have $15 to spend at the fair including admission. Which inequality represents the number of rides you can ride? r ¡Ý 15 r ¡Ü 14 r < 14 r > 14
*January 5, 2012*

**Math**

The table shows the cost of a ski rental package for a given number of people. Using the rate of change, what is the cost for 13 people? People Cost ($) 2 70 3 105 4 140 5 175 There are 4 answer choices - 560, 440, 520, 480. I got 455. Am I wrong?
*January 5, 2012*

**math**

Given A = 2,4,6,8,10 B= 1,2,3,4,5,6,7,8,9,10 What is (A¿B) ?
*January 5, 2012*

**Math**

Explain how to solve? Which equation below shows the equation y = – 1/4x + 4 written in standard form using integers? A) 2x + 3y = 21 B) 3x – 2y = 21 C) –2x + 3y = 21 D) –2x – 3y = 21
*January 5, 2012*

**math**

What is the value of p in the proportion below? 1/3 = P-2/p+8
*January 5, 2012*

**Programming**

Language - PYTHON Design a program that calculates the total amount of a meal purchased at a restaurant. The program should ask the user to enter the charge for the food, and then calculate the amount of a 15% tip and 7% sales tax. Display each of these amounts and the total. ...
*January 5, 2012*

**Math**

A copy center offers its customers two different pricing plans for black and white photocopies of 8.5 in. by 11 in. pages. Customers can either pay $0.08 per page or pay $7.50 for a discount card that lowers the cost to $0.05 per page. Which equation can be used to solve for ...
*January 5, 2012*

**Math**

The table shows the height of an elevator above ground level after a certain amount of time. Let y stand for the height of the elevator in feet and let x stand for the time in seconds. Which equation models the data below? Time (s) Height (ft) 10 235 20 220 40 190 60 160
*January 5, 2012*

**math**

Please explain in detail on how to solve: In 2000, the U.S. government owed about $4.63 trillion to its creditors. The population of the US was282.4 million people. How much did the government owe per person in 2000? Round to the nearest dollar. In 2005, the debt had grown to ...
*January 5, 2012*

**math**

Please explain how to solve: The wavelength of a radio wave is defined as speed divided by frequency. An FM radio station has a frequency of 9 x 10(power of 7) waves per second. The speed of the waves is about 3 x 10 (power of 8) meters per second. What is the wavelength of ...
*January 5, 2012*

**Math**

Please explain in detail how to solve this: During one year, about 163 million adults over 18 years old in the U. S. spent a total of about 93 billion hours online at home. On average, how many hours per day did each adult spend online at home? How do you write each number in ...
*January 5, 2012*

**math**

Please explain in detail how to solve each question: At a certain high school, 350 students are taking an algebra course. The ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys? How can you write a system of equations to model the ...
*January 4, 2012*

**math**

An artist is going to sell two sizes of prints at an art fair. The artist will charge $20 for the small print and $45 for a large print. The artist would like to sell twice as many small prints as large prints. The booth the artist is renting for the day cost $510. How many of...
*January 4, 2012*

**math**

During one year, about 13 million adults over 18 years old in the U.S. spent a total of about 93 billion hours online at home. On average how many hours per day did each adult spend on line at home? How do you write each number in scientific notation? How do you convert the ...
*January 4, 2012*

**Math**

During one year, people in the U.S. older than 18 years old watched a total of 342 billion hours of television. The population of the U.S. older than 18 years old was about 209 million people. On average, how many hours of television did each person older than 18 years old ...
*January 4, 2012*

**Math**

During one year, about 13 million adults over 18 years old in the U.S. spent a total of about 93 billion hours online at home. On average how many hours per day did each adult spend on line at home? How do you write each number in scientific notation? How do you convert the ...
*January 4, 2012*

**math**

You have $47 to spend on music and movie downloads. Each album download costs $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.
*December 31, 2011*

**math**

Please explain how to solve: Reid and Maria both play soccer. This season, Reid scored 4 less than twice the number of goals that Maria scored. The difference in the number of goals they scored was 6. How many goals did each of them score?
*December 31, 2011*

**math**

I believe the answer is 5 months; however, I did it the long way. Explain how to find the answer. Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the ...
*December 31, 2011*

**math**

The vertices of quadrilateral ABCD are (A(1,1), B(1,5), C(5,5) and D(7,1). You want to transform ABCD into a parallelogram by only moving point B. A parallelogram is a four-sided figure with both pairs of opposite sides parallel. What should be the new x-coordinate of point B?
*December 30, 2011*

**math**

Explain how to solve: Sam is ordering pizza. Tony's Pizza charges $7 for a large cheese pizza plus $.75 for each additional topping. Maria's Pizza charges $8 for a large cheese pizza plus $.50 for each additional topping. For what number of toppings will the cost of a ...
*December 30, 2011*

**math**

Explain how to solve: A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide?
*December 30, 2011*

**math**

A farmer grows only pumpkins and corn on her 420-acre farm. This year she wants to plant 250 more acres of corn than pumpkins. How many acres of each crop should the farmer plant?
*December 30, 2011*

**math**

Please show me how to solve: The length of a rectangle is 3 times the width. The perimeter is 44 cm. What are the dimensions of the rectangle?
*December 30, 2011*

**math**

A corner store sells two kinds of baked goods: cakes and pies. A cake costs $14 and a pie costs $8. In one day, the store sold 12 baked goods for a total of $144. How many cakes did they sell?
*December 29, 2011*

**math**

You have $47 to spend on music and movie downloads. Each album download costs $7 and each movie download costs $8. Write and graph a linear inequality that represents this situation. Let x represent the number of albums and y the number of movies.
*December 29, 2011*

**math**

How many solutions does the system have? y - 5x = -6 3y - 15x = -12 A) infinitely many solutions B) no solution C) two solutions D) one solution
*December 29, 2011*

**math**

Please show me how to solve: Sharon has some one-dollar bills and some five-dollar bills. She has 14 bills. The value of the bills is $30. Solve a system of equations using elimination to find how many of each kind of bill she has.
*December 29, 2011*

**math**

Please show me how to solve: At the local ballpark, the team charges $5 for each ticket and expects to make $1,300 in concessions. The team must pay its players $1,800 and pay all other workers $1,500. Each fan gets a free bat that costs the team $3 per bat. How many tickets ...
*December 29, 2011*

**math**

A local citizen wants to fence a rectangular community garden. The length of the garden should be at least 110 ft, and the distance around should be no more than 380 ft. Write a system of inequalities that models the possible dimensions of the garden. Graph the system to show ...
*December 29, 2011*

**Math**

Please explain in detail how to solve the following problem using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 6h 20 min to make 4 small centerpieces and 7 large center pieces. How long does it take to make each ...
*December 29, 2011*

**math**

Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take to make each small centerpiece and each large ...
*December 28, 2011*

**Math**

Please explain how to solve this equation with substitution: The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were $750. How much does the owner ...
*December 28, 2011*

**Math**

Please explain to me how to solve this problem: Reid and Maria both play soccer. This season, Reid scored 4 less than twice the number of goals that Maria scored. The difference in the number of goals they scored was 6. How many goals did each of them score?
*December 26, 2011*

**Math**

Please show me how to solve the following problem: The ocncession stand is selling hot dogs and hamburger during the game. At half-time,they sold a total of 78 hamburgers and hot dogs and brought in $105.50. How many of each item did they sell if hamburgers sold at $1.50 and ...
*December 26, 2011*

**math**

Please show me how to calculate this problem: The school cafeteria sells two kinds of wraps: vegetarian and chicken. The vegetarian wrap costs $1.00 and the chicken wrap costs $3.20. Today they made $99.20 from the 42 wraps sold. How many of the wraps sold were vegetarian?
*December 23, 2011*

**Physics**

A cardboard carton weighing 165 newtons is resting on a marble floor. If the coefficient of friction between cardboard and smooth marble is 0.20, how much force would it take to keep the box sliding along at a constant speed?
*December 19, 2011*

**english**

What?
*December 15, 2011*

**English**

Just use the website that you got the information from, not the original website.
*December 15, 2011*

**Math**

2cosx + sqr3 = x [0degrees,360degrees)
*December 14, 2011*

**math**

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can she make? The ...
*December 13, 2011*

**math**

Aimi is making Valentine's Day cards for everyone in her class. She plans to use a whole sheet of paper for each of her 5 closest friends. She will use 1/2 of a sheet of paper for everyone else in the class. She has 15 sheets of paper. How many cards can she make?
*December 13, 2011*

**Algebra**

The profit, y, be selling x pretzels is found by the formula y = -0.002x^2 + 1.6x -350. Find the number of pretzels that must be sold to maximize profit.
*December 12, 2011*

**calculus**

Let f be the function given by f(x)= x^2+4x-8. The tangent line to the graph at x=2 is used to approximate values of f. For what value(s) of x is the tangent line approximation twice that of f?
*December 11, 2011*

**calculus**

Thanks, that's the answer I get.
*December 9, 2011*

**calculus**

The width of a rectangle is measured as 12.3 cm, while the length is measured as 28.8 cm. The width measurement could be off by 1.2 cm, and the length could be off by .04 cm. Estimate the maximum possible error in calculating the area of the rectangle.
*December 9, 2011*

**calculus**

thanks!
*December 8, 2011*

**calculus**

Find the volume that remains after a hole of radius 1 is bored through the center of a solid sphere of radius 2.
*December 8, 2011*

**calculus**

thanks, that's pretty close to what I got
*December 8, 2011*

**calculus**

W=6x^4 * SQRT4y * ln * (3z) Yes, the derivative of W with respect to x
*December 8, 2011*

**calculus**

W=6x^4 SQRT4y ln (3z) find F with regards to x Is 24x^3 SQRT4y ln (3z) correct?
*December 8, 2011*

**health and safety**

1 tablespoon p.58
*December 6, 2011*

**Calculus**

Find the partial derivative for x. f(x,y)=1/SQRTx^2+y^2
*December 1, 2011*

**physics**

Running at 2.0 m/s a 45.0 kg person collides with a 90.0 kg person who is traveling at 7.0 m/s in the other direction. Upon collision, the 90 kg person continues to travel forward at 1.0 m/s. How fast is the 45 kg person knocked backwards?
*November 29, 2011*

**Calculus**

same thing I got, but not even close to any of the answer choices ... 2.69, 16.69, -2.15, and 1.51. This one has me stumped!!
*November 27, 2011*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4) ln x dx between 3 and 0. I tried this problem two different ways and got two different answers 1.63 and 3.89. which one is correct? Please.
*November 27, 2011*

**chemistry**

Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
*November 27, 2011*

**Calculus**

so my answer would be 3/2 (3e^4+1)/ (e^2-1)?
*November 26, 2011*

**Calculus**

(1/e^2-1)(6x^2 lnx/2-x^2/4) am I on the right track?
*November 26, 2011*

**Calculus**

Find the average value of the function on the given interval. f(x)=6x lnx; [1,e^2]
*November 26, 2011*

**Calculus**

thanks for your answer, there was typo on the question ... but I figured out the answer using excel spreadsheet for Simpson's rule.
*November 25, 2011*

**Calculus**

Use your calculator to approximate the integral using the method indicated, with n=100. Round your answer to four decimal places. sqrt(x+4)^dx between 4 and 0.
*November 25, 2011*

**Chemistry**

Write the molecular equation, the complete ionic equation, and the net ionic equation for the reaction of barium hydroxide with sodium nitrate.
*November 23, 2011*

**Chemistry**

How many milliliters of a 3.85 M solution of Fe2+ are needed to titrate 250.0 mL of a 0.125 M Cro4 2- solution? H + CrO4 2- + Fe2+ yields to Fe3+ + Cr2O3 + H2) (not balanced)
*November 23, 2011*

**Chemistry**

What is the mass, in grams, of NaCl formed from the reaction of 2.75 mL of a 6.00 M Na2SO4 solution and 8.30 mL of 2.5 M solution of HCl?
*November 23, 2011*

**Calculus**

that's what I was thinking, the teacher must have made a mistake on this question ... no one I ask can help me with it.
*November 23, 2011*

**Calculus**

Use integration by parts to find the integral. Round the answer to two decimal places if necessary. (x+4)^ln x dx between 3 and 0
*November 23, 2011*

**Math**

Please show me how to solve: Hannah took a survey of 500 students at her school to find out whether they liked baseball or football. The results are shown in the Venn diagram. How many of the students surveyed like football? 28% liked baseball, 32% liked both, 16% liked ...
*November 21, 2011*

**science-important!**

What was the correct answer?
*November 19, 2011*

**math**

Steve, Is there a way to find out how many liked football only. How do you separate the "both" number to find football only?
*November 19, 2011*

**math**

How many of the students surveyed liked football?
*November 19, 2011*

**math**

Please show me how to solve: Hannah took a survey of 500 students at her school to find out whether they liked baseball or football. The results are shown in the Venn diagram. How many of the students surveyed like football? 28% liked baseball, 32% liked both, 16% liked ...
*November 19, 2011*

**math**

Please show me how to work this problem: Fran makes a rectangular tablecloth that has an area of 5 ft squared. Her mother makes a tablecloth that is three times the length and three times the width of Fran's. What is the area, in square feet, of her mother's tablecloth?
*November 19, 2011*

**Math**

Two farmers use combines to harvest corn from their fields. One farmer has 600 acres of corn, and the other has 1000 acres of corn. Each former's combine can harvest 100 acres per day. Write two equations for the number of acres y of corn not harvested after x days. Are ...
*November 19, 2011*

**math**

Please show me how to solve: For what value of k are the graphs of 12y = -3x + 8 and 6y =kx - 5 parallel? For what value of k are they perpendicular?
*November 17, 2011*

**algebra**

I do not know how to do this problem, please help. (35b^3 + 25b^2 + 30b + 44)divided by (5b + 5)
*November 14, 2011*