Thursday

May 28, 2015

May 28, 2015

Total # Posts: 792

**physics **

A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to gravity at the surface ...
*January 7, 2015*

**math**

On Monday, 247 students went on a trip to the zoo. All six buses were filled and seven students had to travel in cars.How many students were in the bus
*January 7, 2015*

**7th grade math**

Thanks!!
*December 17, 2014*

**7th grade math**

sorry, typo on #4 still. answer is just 112
*December 17, 2014*

**7th grade math**

For #4 should be: m/8 = 5 +9 m/8 = 14 m = 14*8 m = 112/8
*December 17, 2014*

**7th grade math**

Can you check these problems? 1. 4x^2 + 3x - 4x +5 = 4x^2 - x + 5 2. m - n + m - n - n = 2m - 3n 3. (7x + 5 - 3y) - (-3x - 5 +4y) = 7x + 3x -3y + 4y + 0 = 10x - y = 0 4. m/8 - 9 = 5 m/8 = 5 + 9 m = 14/8 m = 7/4 = 1 3/4
*December 17, 2014*

**7th grade math**

Can you check these? 3. Simplify (56/8+3)*2-1 = (7+3)*2-1 = 10*2-1 = 20-1 = 19 9. A spool of lanyard is 21 yards long. If it is cut into pieces that are each 1.75 yards long, how many pieces of lanyard will there be? Ans:21/1.75 = 12 pieces 12. (3/5)x - 10 = 1/6 Ans: (3/5)x = ...
*December 15, 2014*

**7th grade math**

thanks! hopefully, the others i posted are correct too.
*December 14, 2014*

**7th grade math**

Can you check these additional problems? 36. 10 - h >= 21 -h >= 21 - 10 -h >= 11 h >= -11 38.p + 8.5 > 1 p > 1 - 8.5 p > -7.5 40. 8-2(5-9g) = -128 8 - 10 + 18g = -128 -2 + 18g = -128 18g = -128 + 2 18g = -126 g = -126/18 g = -7 41. (3/5)k - 1/3 = -1 (3/5)k...
*December 14, 2014*

**7th grade math**

Can you check these? 3. Simplify (56/8+3)*2-1 Ans = (7+3)*2-1 = 10*2-1 = 20-1 = 19 9. A spool of lanyard is 21 yards long. If it is cut into pieces that are each 1.75 yards long, how many pieces of lanyard will there be? Ans:21/1.75 = 12 pieces 12. (3/5)x - 10 = 1/6 Ans: (3/5)...
*December 14, 2014*

**7th grade math**

Thanks! didn't realize it copied twice.
*December 9, 2014*

**7th grade math**

Can you check these? 1. A recipe for chocolate pudding calls for 1 ¼ cups of milk. The recipe makes 3 servings. How many cups of milk are needed to make 9 servings? Ans: 1.25/3 = x/9 3x = 9*1.25 3x = 11.25 x = 11.25/3 x = 3.75 or 3 3/4 cups of milk 2. Two trees in Mrs. ...
*December 9, 2014*

**7th grade math**

I'm confused and not sure of the difference. When do i use the ratio vs when do i have to add ratios? I posted a couple of questions like that and was told they were wrong. Example#4. 5 out of 6 students prefer pepperoni to sausage. If Ms. Greene has 120 students, how many...
*December 6, 2014*

**7th grade math**

Can you check these? 1. Olivia typed 2 pages in 15 minutes. Write an equation relating the number of minutes m to the number of pages typed. How long will it take her to type 10 pages at this rate? Ans: 15/2 = 7.5 = 7.5 * 10 = 75 minutes 2. If the ratio of Type O to non-Type O...
*December 6, 2014*

**7th grade math**

Thanks for the explanations!!
*December 6, 2014*

**7th grade math**

Can you check my homework? (wasn't really sure about #4 and #6) 1. Tekell ate 10 pieces of candy in the same time that Mackensay ate 4 pieces. How many pieces will Tekell have eaten when Mackensay eats 6? Ans: 10/x = 4/6 4x = 60 x = 15 pieces of candy 2. Savannah made $102...
*December 6, 2014*

**Trig- math**

@Steve, I plugged in the numbers in the equation. I see where I went wrong. Thank you!
*November 23, 2014*

**Trig- math**

@Damon, thank you! :)
*November 23, 2014*

**Trig- math**

Find the area of a triangle if the sides of the triangle have the lengths 849mi, 930mi, and 1301mi. Here's my work: a=849 b=930 c=1301 A=.5(849)(930)sinA sin A = 394,785 mi^2 (this number doesn't seem right to me, can you explain to me what I did wrong)?
*November 23, 2014*

**Trig**

UPDATE: I figured it out.
*November 23, 2014*

**Trig**

I need help with my vectors unit. I'm really confused about how to set them up. Please help. a.) Given u=2i-5j and v=-i+3j, determine -6u-3v? b.) Find the component form of v if |v|=4 and the angle it makes with the x-axis is 60 degree. c.) Given u=5i+3j and v+3i+2j, find...
*November 23, 2014*

**Physics**

A projectile of mass 0.99 kg is shot from a cannon. The end of the cannon’s barrel is at height 6.6 m, as shown in the figure. The initial velocity of the projectile is 9.2 m/s. The projectile rises to a maximum height of ∆y above the end of the cannon’s barrel...
*November 23, 2014*

**Math (trig)**

Thank you!
*November 23, 2014*

**Math (trig)**

The distance from home plate to dead center field in a certain baseball stadium is 409 feet. A baseball diamond is square with a distance from home plate to first plate base 90 feet. How far is it from first base to dead center field? I also need help setting this up.
*November 23, 2014*

**Math (trig)**

thank you
*November 23, 2014*

**Math (trig)**

A force of 35lb is required to hold a 72lb toolbox on an incline. What angle does the incline make with the horizontal? Please help me set this up.
*November 23, 2014*

**Math- Combinations **

A math department is allowed to tenure 4 of 19 eligible teachers. In how many ways can the selection for tenure be made? n!/(n-r)!r! = 4!/-15!19!
*November 18, 2014*

**Algebra 1**

Would it be y=(-1)^x?
*October 31, 2014*

**Algebra 1**

Write a rule for a nonlinear function such that y is negative when x = 1, positive when x = 2, negative when x = 3, positive when x = 4, and so on. The entire problem confuses me. I have no idea what its even asking besides it wants an equation.
*October 31, 2014*

**7th grade math**

Can you check my answers? 1. 48lbs 6oz - 19lbs 9oz = 47lbs 22oz - 19lbs 9oz Ans: 38lbs 13oz 2. 3weeks 5days x 8 = 24weeks 40days; 40days=8weeks Ans: 32weeks 3. 49 people are in line to see a movie. 17 are in front of Jackie. How many are behind her? 49 - 18 = 31 Ans: 31 people...
*October 30, 2014*

**7th grade math**

Not sure how to solve this: Suppose your school is selling magazine subscriptions. Each subscription cost $20. the company pays the school half of the total sales in dollars. The school must also pay a one-time fee of $18. What is the fewest number of subscriptions that can be...
*October 17, 2014*

**7th grade math**

Not sure how to solve this: Suppose your school is selling magazine subscriptions. Each subscription cost $20. the company pays the school half of the total sales in dollars. The school must also pay a one-time fee of $18. What is the fewest number of subscriptions that can be...
*October 16, 2014*

**7th grade LA**

thanks Ms. Sue!
*October 15, 2014*

**7th grade LA**

4. I don't know why he did that. indep = I don't know dep = why he did that Ans: complex? 6.He told me that he is returning to London next summer indep = he told me dep = that he is returning to London next summer Ans: complex?
*October 15, 2014*

**7th grade LA**

Can you check the following? 1. I didn't know what time it was so I was very late to class indep = I didn't know what time it was indep = I was very late to class Ans: compound 2. I'll help you if you help me. indep = I'll help you dep = if you help me Ans: ...
*October 15, 2014*

**Math**

How can you check the answer to a decimal multiplication problem?
*October 12, 2014*

**7th grade math**

Not really sure what to do for this problem. this was how it was worded on worksheet. Larue scored 10 points less than 3 times the number of points that Ross scored. Larue scored 11 points. How many points did Ross score?
*October 7, 2014*

**7th grade math**

thanks! Also, one more question please. Larue scored 10 points less than 3 times the number of points that Ross scored. Larue scored 11 points. How many points did Ross score? Ans: Not really sure what to do. this was how it was worded on the worksheet.
*October 7, 2014*

**7th grade math**

Can you check my answers please. 1. Joe and his friends at 3/8 of pie. If the pie was cut into 8 pieces, how many pieces are left? Ans: 8/8 - 3/8 = 5/8 pieces left 2. Michaela walked 2/5 miles to the store in 1/4 hour. What's her walking pace? Ans: (2/5)/(1/4) = (2/5)*(4/1...
*October 7, 2014*

**math **

what is your burger wrapping friends hourly wage after taxes if he works 9 hours a day, 4 days a week, and gets paid every 2 weeks? his paycheck is $591.12 after taxes.
*October 6, 2014*

**7th grade math**

Can you check me answer? Mrs. Acosta's car can travel an average of 24miles on each gallon of gasoline. Write and solve an equaltion to find how many gallons of gasoline she will need for a trip of 348 miles. Ans: 348 = 24g 348/24 = g 14.5 = g. She will need 14.5 gallons ...
*October 6, 2014*

**7th grade Science**

Can you check my answer below, please? Elizabeth did an experiment to test the effect of salt water on rusting rate of a nail. She put 3 nails in the same bowl of salt for one week. How could she improve her experiment? Ans: 1) place each nail in a separate bowl with different...
*October 1, 2014*

**7th grade math**

Can you check this problem? Jean has 5 different colors of markers: red, blue, green, orange, and purple. Two colors are used to make a sign. How many different combinations are possible? List them. Ans: 10 possible combinations red/blue, red/green, red/orange, red/purple, ...
*September 30, 2014*

**7th grade math**

Classify properties of operations. 1. (-4-3n) * -8 Ans: distributive 2. (6+4)+8=6+(4+8) Ans: associative 3. (1-7n) * 5 Ans: distributive
*September 29, 2014*

**Math**

Write a real world description to fit the expression -50 divided by 5.
*September 24, 2014*

**physics **

A cat is being chased by a dog. Both are running in a straight line at constant speeds. The cat has a head start of 3.6 m. The dog is running with a speed of 8.9 m/s and catches the cat after 6.9 s. How fast did the cat run?
*September 24, 2014*

**math**

write and solve a word problem that can be modeled by the difference -4 - 10. My dog lost 4 ounces this year And 10 ounces last year. What is the Difference in weight loss? Or what is total weight lost? I am not sure I'm doing this right. The answer I got to the original ...
*September 20, 2014*

**7th grade LA**

thanks!!
*September 17, 2014*

**7th grade LA**

Ok, hopefully I got it this time #4 independent: we get to talk independent: I love that part of the day dependent: as we walk around after lunch structure: compound complex
*September 17, 2014*

**7th grade LA**

So, 2.You are supposed to get all of your books for the beginning of the day. prep phrase: for the beginning of the day independent: you are supposed to get all of your books structure: simple 4. We get to talk as we walk around after lunch; I love that part of the day. ...
*September 17, 2014*

**7th grade LA**

Could you check my answers? Maybe recommend a good website for help. Label independent clauses, dependent clauses, FANBOYS. Then decide sentence structure (simple, compound, complex, compound complex). 1. When you go to school, you have to go to homeroom first. dependent: when...
*September 17, 2014*

**7th grade math**

Can you check the following? 1. A recipe for muffins needs 1/2 cup of milk. You are making 3/4 of the recipe. How much milk do you need? Ans: (1/2) / (3/4) = (1/2) x (4/3) = 2/3 cups 2. Betty is running on a track that is 2/3 of a mile long. So far she has run 1/2 of the way ...
*September 15, 2014*

**7th grade math**

how do I solve for this: If 5/6 is divided by a certain fraction, a/b, the product is 1/4. What is the fraction a/b? Ans: (5/6)/(a/b) = 1/4 = do i need to divide both sides by 1/4 to get (5/6)/(1/4) = (5/6)x(4/1) = 20/6 = need to somehow get a/b by itself not sure what to do...
*September 9, 2014*

**Algerbra**

select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8^2 + 2x + 2
*September 7, 2014*

**7th grade LA**

The question mark was because i wasn't sure of the answer. Not sure about statement - Don't include a clause in an infinitive phrase. is this for #4 (infinitive phrase)? so the answer would be to sing a song and to end the evening (without adding that had been ...
*September 7, 2014*

**7th grade LA**

Identify the infinitive phrase. 1. While the train was stopped at the station, Bugsy attempted to climb to the top of one of the freight cars. Ans: to climb to the top of one of the freight cars? 2. During the Great Depression, audiences wanted to laugh when they went to the ...
*September 7, 2014*

**Physics**

A car slows from 23 m/s to 3.4 m/s at a constant rate of 2.1 m/s2. How many seconds are required before the car is traveling at 3.4 m/s?
*September 7, 2014*

**Chem**

Assume low fat milk is 2.36 % buttermilk by volume. If you drink 3 L of milk, how many liters of butterfat have you drunk? =.0708 L Given that the density of the buttermilk is measured to be 0.79 g/mL and you have not drunk anymore milk, how many grams of buttermilk have you ...
*September 5, 2014*

**algebra**

Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -3x2 + 6x + 9
*August 31, 2014*

**Markups and markdowns**

Sally buys a hand bag. There was a discount of 30%.If Sally paid $20,What was the original price?
*August 29, 2014*

**7th grade Science**

Can you help me figure out the manipulated , responding, & controlled variables in the following? Walker wanted to test how weight of a paper airplane affected the distance the airplane flew. he stood at the starting line and threw the airplane. He measured how far the paper ...
*August 27, 2014*

**7th grade Math/Science**

oh! I see. I thought i needed a formula. 9000m + 19000m = 28000m Thanks!
*August 20, 2014*

**7th grade Math/Science **

Can you help me with this science question: from sea level, the biosphere goes up about 9km and down about 19km. What is the thickness of the biosphere in meters? (there wasn't a formula in the workbook). Thanks
*August 20, 2014*

**chemistry**

Which one of the following is a characteristic of a metal? A. Reacts with bases to produce salts B. Changes the color of litmus paper to red C. Becomes negative when combined with other elements D. Conducts heat readily
*July 21, 2014*

**Pre algebra**

Will has a mean score of 62 on the first five test in science. if he gets a 50 on the next test what will his mean be then?
*July 14, 2014*

**babysitting**

5) Which foods hinder the absorption of less absorbable forms of irons in foods, such as whole grains, dried peas or beans? A. Orange juice or other forms of Vitamin C B. Milk products or eggs C. Tea D. All of the above E. B and C 6) Which vegetable would cause the blood ...
*July 12, 2014*

**US Government**

courts issued court orders, or i-j--cti--, to make sure that people of color were allowed to vote
*July 7, 2014*

**Math Personal Finance**

A friend tells you that her savings account doubled in 9 years. Use the Rule of 72 to estimate what the APR of her account was.
*June 8, 2014*

**Math Personal Finance**

A friend tells you that her savings account doubled in years. Use the Rule of 72 to estimate what the APR of her account was. APR=____%
*June 8, 2014*

**Math Personal Finance**

What is the present value of an investment that will be worth $2000 at the end of five years? Assume an APR of 6% compounded monthly. Present Value= $____
*June 8, 2014*

**Math Personal Finance**

What is the present value of an investment that will be worth $2000 at the end of five years? Assume an APR (Annual Percentage Rate) of 6% compounded monthly. The present value is $_____ .
*June 8, 2014*

**Math Personal Finance**

Assume an 18-month CD purchased for $7000 pays an APR of 5% compounded monthly. What is the APY? APY=____%
*June 8, 2014*

**Math Personal Finance**

Assume an investment of $100 earns an APR (Annual Percentage Rate) of 5% compounded annually. The balance after 190 years will be $______.
*June 8, 2014*

**Math Personal Finance**

Assume an investment of $7000 earns an APR (Annual Percentage Rate) of 6% compounded monthly for 18 months. The money in your account after 18 months will be $______.
*June 8, 2014*

**Math Personal Finance**

Assume we invest $2000 for one year in a savings account that pays an APR (Annual Percentage Rate) of 10% compounded quarterly. The compound interest formula is: Balance after t periods = Principal × (1 + r)t The final balance using the compound interest formula is $...
*June 8, 2014*

**Math Personal Finance**

Assume we invest $2000 for one year in a savings account that pays an APR (Annual Percentage Rate) of 10% compounded quarterly. Calculate the interest and compound it by hand each quarter rather than using the compound interest formula. The total interest the account has ...
*June 8, 2014*

**Math Personal Finance**

Assume a 30-month CD purchased for $4000 pays simple interest at an annual rate of 5.5%. How much total interest does it earn? What is the balance at maturity?
*June 8, 2014*

**Personal Finance**

Suppose you put in a savings account at an APR of 6% compounded monthly. Fill in the table below rounding your answers to the nearest cent. (Calculate the interest and compound it by hand each month rather than using the compound interest formula.) Month Interest Earned ...
*June 8, 2014*

**Math Personal Finance**

Assume a 30-month CD purchased for pays simple interest at an annual rate of 5.5%. How much total interest does it earn? What is the balance at maturity?
*June 8, 2014*

**Math**

Marisol invested $48,000 in an 18 month CD with a 4.28% APY compounded monthly. What will be the value of the CD be after the 18 months?
*June 5, 2014*

**Math**

In 1986 an earthquake measuring 5.0 on the Richter scale hit northeast Ohio. This earthquake is _______ times as intense as a magnitude 2.0 quake
*June 5, 2014*

**trig**

A loading ramp is 35 feet long and forms an angle measuring 10° with the ground. How high is the top end of the ramp off the ground? Round your answer to the nearest tenth?
*May 22, 2014*

**Math**

The right side of the orchestra section of the Nederlander Theatre in New York City has 19 rows, and the last row has 27 seats. The number of seats in each row increases by 1 as you move toward the back of the section. How many seats are in this section of the theatre?
*May 14, 2014*

**Math**

Courtney organized a charity walk. In the first year, the walk generated $3000. She hopes to increase this amount by $900 each year for the next several years. If her goal is met, in how many years will the walk have generated a total of at least $65,000 for the charity?
*May 14, 2014*

**Pre-Calc**

Word of mouth advertising can be an effective form of marketing , or it can be very harmful. Consider a new restaurant that serves 27 customers on its opening night. A) Of the 27 customers , 25 found the experience enjoyable and each told 3 friends over the next month. This ...
*May 14, 2014*

**math**

adult tickets to a play are $12 student tickets are only $8 if a theater sells 90 tiickets to a play for a total of $980, how many of each kind of ticket did the theater sell?
*May 12, 2014*

**Chemistry**

Using a table of standard reduction potentials, determine the best answer to the following questions. a) Which of the following reagents would oxidize Cr to Cr3 , but not Ag to Ag ? Choices: Ca^2+, Br2, Co^2+, Ca, Br^-, or Co. b) Which of the following reagents would oxidize I...
*May 4, 2014*

**chemistry**

C5H12 because the boiling point falls between Butane (C4H10) and Hexane's (C6H14) boiling points. The only compound that falls between the two is pentane
*April 28, 2014*

**Chemistry**

Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write balanced half-reaction equations for each of the following: (a) H2O2(aq) acting as an oxidizing agent in an acidic solution. Write the balanced half-...
*April 28, 2014*

**Chemistry**

use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. on the chart is said ethane(C2H6) is -84.0. In the hint it said ...
*April 28, 2014*

**Chemistry**

At 25 °C, the equilibrium partial pressures for the following reaction were found to be PA = 4.10 bar, PB = 5.60 bar, PC = 1.20 bar, and PD = 9.70 bar. 2A(g)+2B(g)-->C(g)+ 3D(g) What is the standard change in Gibbs free energy of this reaction at 25 °C. I don't ...
*April 25, 2014*

**6th grade Lang Arts**

So... In sentence 1, the adjective clause is needed to let us know what stadium we're talking about. So we don't need to use a comma. In sentence 2, the adjective clause is not needed because we already mentioned my father as the subject. So, a comma can be used to set...
*April 21, 2014*

**6th grade Lang Arts**

Can you explain why the comma used in sentence 1 is not correct as compared to the comma used in sentence 2? (from homework) 1. The stadium, that my favorite team plays in, seats over 81,000 people. 2. My father, who is an excellent reader, finished a 500 page book in one day!
*April 21, 2014*

**Chemistry**

Calculate ΔG° for the following reaction at 298 K.? A+B --> 2D ΔH° = 775.0 kJ ΔS°=296.0 J/K C --> D ΔH° = 446.0 kJ ΔS°=-218.0 J/K A+B --> 2C ΔG° = ? kJ I know I am suppose to reverse the (C --> D) and add a ...
*April 20, 2014*

**Chemistry**

Thanks DrBob222!
*April 20, 2014*

**Chemistry**

If delta H°rxn and delta S°rxn are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is a)enthalpy driven to the left. b)entropy driven to the right. c)entropy driven to the left. d)...
*April 20, 2014*

**Chemistry**

Thank you. I understand it a lot better. And as for equation, I figure that I figure that I left out the kPa. so that for the first process, there is a decrease in pressure so more movement for the molecules therefore S increases, right?
*April 20, 2014*

**Chemistry**

Predict how the entropy of the substance is affected in the following processes: a) O2 (g,200 kPa, 300k) --> O2 (g, 100, 300k) b)Br2 (l, 1 bar, 25 degree C) --> Br2 (g, 1 bar, 25 degree C) C)Fe (s, 1 bar, 250 degree C)--> Fe(s, 1 bar, 25 degree C) will entropy either ...
*April 20, 2014*

**6th grade Lang Arts**

Can you check my homework, please? Identify each pronoun as personal, reflexive, demonstrative, indefinite or interogative. 1. These are Elberta peaches, which are very popular in the United States. Ans: these = indefinite 2. Nobody really knows where the fruit came from ...
*April 16, 2014*

**Chemistry**

A solution of I2 was standardized with ascorbic acid. Using a 0.0500 g sample of the acid, 26.50 mL of I2 were required to reach the starch end point.
*April 14, 2014*