Saturday

October 1, 2016
Total # Posts: 1,597

**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*

**algebra**

Please I do not know how to figure this out: Identify the degree of each term of the polynormial and the degree of the polynormial of -4x^3 + 2x^2 + 7x + 1 degree of the first term, second, third, fourth terms and the polynomial

*November 13, 2011*

**algebra**

Again I have no clue in figuring out this problem, please help: (3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=

*November 13, 2011*

**algebra**

Again I have no clue in figuring out this problem, please help: (3s^4-3s^3+3s^2+13s-6) + (s^5+8s^3+6s^2-3s+3) + (-6s^4+s^2-7s-6)=

*November 12, 2011*

**algebra**

Please I do not know how to figure this out: Identify the degree of each term of the polynormial and the degree of the polynormial of -4x^3 + 2x^2 + 7x + 1 degree of the first term, second, third, fourth terms and the polynomial

*November 12, 2011*

**algebra**

Please help: Multiply and simplify: (5sqrt:5 - 10sqrt:3)(2sqrt:5 + 4sqrt:3)

*November 12, 2011*

**algebra**

Help: Divide: (35b^3+ 25b^2 + 30b +44) divided by (5b + 5)

*November 12, 2011*

**algebra**

Please I need help: Find the vertex, the line of symmerty and the maximum or minmum value of the quadratic function: f(x)= 2x^2+2x+3

*November 11, 2011*

**math**

What is the slope of a line that is parallel to y=2? What is the slope of a line that is perpendicular to y=2? Is it "0"?

*November 11, 2011*

**math**

Write an equation that has a slope of -2/3 in Point-slope form and Slope-intercept form.

*November 10, 2011*

**algebra**

Please help: If the sides of a square are lingthened by 7cm, the area becomes 169cm^2. Fine thelength of a side of the orginal square.

*November 10, 2011*

**algebra**

Need help. please help: Solve and simplify, use comma to separate answers: sqrt:9x+55=x+5

*November 10, 2011*

**algebra**

Add and simplify 4y/y^2-9 + y/y-3

*November 10, 2011*

**algebra**

I do npot understand how to do this problem, please help: 4y/y^2-y/y-3

*November 10, 2011*

**algebra**

Please I need help! Solve and simplify: x^2+14x-4=0

*November 10, 2011*

**Math**

Describe how to draw a line that passes through the origin and has a slope of 3/5.

*November 9, 2011*

**college math excursions**

what is the next number sequence for 0,10,24,56,112,190

*November 8, 2011*

**physics**

6600 N

*November 7, 2011*

**fraction 10-1 math**

the anwser is 3/7 because 4+3=7.

*November 7, 2011*

**english**

Can somebody help me restate my thesis please. statement for the conclusion. My thesis is: An analysis of the literary devices in Katy Perry " Fireworks" and Miley Cyrus " The Climb" reveals Miley Cyrus creates a better argument for how every person is an ...

*November 3, 2011*

**math**

F(x) = /x-2/ (absolute value) Please show me to to graph this equation.

*November 1, 2011*

**math**

for F(x) = /x-2/ (absolute value) When you graph this problem, does it have a straight line or a "v" line?

*November 1, 2011*

**chemistry**

Hi everyone, Why are metals more reactive in acids? Thanks

*October 29, 2011*

**natural disaster**

if volcanos and earthquakes, why do people choose to live in the area where it occurs the most?

*October 28, 2011*

**data management**

1) show that a) 2(2n-1 C n-1) = (2n Cn) b) n(2n C n) = (n+1)(2n C n+1)

*October 28, 2011*

**english**

is " but I will not allow anyone to succeed hanging clouds over me" a metaphor or paradox or is it something else? is "there's a light in me, that shines brightly" a metaphor? " Iwill rise steadily sailing out of their reach" a paradox? if im ...

*October 28, 2011*

**english**

can somebody tell where the poetic devices are located in the song cant take that away by mariah carey? such as metaphor, mood paradox etc. Mmmmh Whoaaa They can say, Anything they want to say, Try to bring me down, But I will not allow anyone to succeed hanging clouds over me...

*October 28, 2011*

**data management**

1) solve: a) (2n+1C2) = (nC2)sqaured b) 12(nC2) = n!

*October 28, 2011*

**Data management**

1)SOLVE: a) 2nP3 = 2(nP4) b)6(n+1P2) = 3nP2 2) If (nC12 = (nC8), find (nC17) and (22Cn) 3)simplify. a) n(squared) (n-2)! - n(n-2)! / n! b) (nC2) - (nCn-2) 4)If nPr - 506 and (nCr_ = 253, find n and r. 5) If (28C2r)/(24C2r-4) = 225/11, find r.

*October 27, 2011*

**College Math**

Make 300 mL of a 0.4M NaOH solution.

*October 27, 2011*

**College Chemisrty**

There are 140 g of H2SO4 in 400 mL of a solution. What is the molarity?

*October 27, 2011*

**Data management**

1) consider the number of grid paths from the orgin in a coordinate graph to each of the following points: a) (4,7) b) (3,7) c) (4,6) 2) simplify: (n-r)! / (n-r+1)! 3) solve (n+2)!/ (n-1)! = 210

*October 27, 2011*

**math**

Suppose your business has a special checking account used just for paying the phone bill. The balance is $1040.00 this month. Next month the balance will be $995.80, after that it will be $951.60, and on the third month the balance will be $907.40. Write a rule to represent ...

*October 27, 2011*

**math**

a function is (always, never or sometimes) a relation.

*October 27, 2011*

**Data management**

1) In how many ways can 12 distinct objects be seperated into three equal piles? 2) In how many ways can 25 students be assigned to 4 distinguishable study groups if at least 6 students must be in each group? 3) in how many ways can 4 students be assigned to 9 class periods if...

*October 27, 2011*

**Math**

Lloyd makes an hourly wage of $9.50 per hour. Every 6 months he receives a $0.50 per hour raise. Write a rule that describes his raise and determine how much he will be paid after 4 years.

*October 27, 2011*

**math**

You budget $100 each month for parking. Each day you use the downtown parking lot. It costs $5. Write a rule to represent the amount of money left in the monthly budget as a arithmetic sequence. How much money is left in you budget after you have used the downtown parking lot ...

*October 25, 2011*

**math**

You start an investment account with $3000 and save $100 each month. Write a rule to represent the total amount of money you invest in the account as an arithmetic sequence. How much money will you have invested after 12 months?

*October 25, 2011*

**arithmetic**

The initial term of an arithmetic sequence is 5. The eleventh term is 125. what is the common difference of the arithmetic sequence?

*October 25, 2011*

**Statistics**

1. Consider a population with µ=73.6 and 0 = 5.38 (A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

*October 25, 2011*

**math**

you want to take an 8-ft.wide piece of plywood through a 36-inch-wide door. What is the minimum possible height for the door to allow youto fit the plywood?

*October 24, 2011*

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?

*October 24, 2011*

**math**

two cars leave the same point at noon. one car travels north and the other car travels east. suppose the northbound car is traveling 40mph, and after two hours, the two car are 100 miles apart.how fast is the other car going?

*October 24, 2011*

**Statistics**

Consider a population with µ=73.6 and 0 = 5.38 (A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

*October 24, 2011*

**math**

hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range of the number of cans ...

*October 23, 2011*

**math**

hello ya im helping my son homework.regarding estimation to get reasonable range. Three classes collected aluminum cans for recycling .one class collected 42 cans,another collected 56 cans,and the third class collected 64 cans .what is a reasonable range of the number of cans ...

*October 23, 2011*

**Statistics**

Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.

*October 20, 2011*

**HUM/111**

identify two possible strategies that Thomas Hutchinson or Samuel Adams, or both, likely used to develop and improve his thinking prior to taking a stand and acting according to his beliefs.

*October 14, 2011*

**Physics**

I have the same problem and that previous answer is wrong.

*October 12, 2011*

**Ap Chem**

thanks and i understand. i appreciate your write up!

*October 9, 2011*

**Ap Chem**

Consider the following reaction at 1000°C:CO(g) + 3H2(g) CH4(g)+ H2O(g) At equilibrium, the following concentrations are measured: [CO] = 0.0613 M, [H2] = 0.1839 M, [CH4] = 0.0387, [H2O] = 0.0387 M. Calculate the value of Kc for this reaction. Calculate the value of Kp. ...

*October 9, 2011*

**Ap Chem**

Why is it possible for Kp to be less than Kc? If this is the case then when Kc>1 it favors products, but if Kp <1 than how can that reaction favor products? Or does that rule only apply for Kc

*October 9, 2011*

**Ap Chem**

Why is it possible for Kp to be less than Kc? If this is the case then when Kc>1 it favors products, but if Kp <1 than how can that reaction favor products? Or does that rule only apply for Kc

*October 9, 2011*

**math**

3/4-1/3z=1/4 5/6c-2/3c=1/3 please show step by step Thanks!

*October 2, 2011*

**math**

3/4 - 1/3z= 1/4 please show step by step to ans.

*October 2, 2011*

**algebra**

2(a-4)+15=13 Please show step by step

*October 2, 2011*

**chemistry**

4NH3 + 5O2 → 4NO + 6H2O 2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO In this process, the NO made in the last reaction is recycled back into the second reaction and used as a reactant. In the end, all of the NO produced is recycled back so that when the ...

*September 29, 2011*

**Algebra I**

How do you solve the following literal equation: xp + yp = z

*September 29, 2011*

**science[physics]**

why is the pressure more on ground when a person is walking than when he is standing ?

*September 28, 2011*

**math**

i guess it's 8000

*September 27, 2011*

**math**

What is the interest amount on $1,800 for a year at 1/2%

*September 27, 2011*

**math**

how to divide 7 over 35?

*September 26, 2011*

**Physics**

Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is ...

*September 26, 2011*

**Physics**

A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is in the air before it comes back to his hand. c.) at what time(s) will the ball pass a point 8.00 m. If you got multiples ...

*September 26, 2011*

**intermediate 111**

Wilson Corporation began operations in January 2008, and purchased a machine for $20,000. Wilson uses straight-line depreciation over a four-year period for financial reporting purposes. For tax purposes, the deduction is 50% of cost in 2008, 30% in 2009, and 20% in 2010. ...

*September 21, 2011*

**algebra**

raise the quantity in parenthesis to the indicated exponent and simplify. (-16x^-2y^3)^2 __________ 80x^-2y^3

*September 21, 2011*

**Physics**

The speed limit on a particular freeway is 28.0 m/s (about 101 km/hour). A car that is merging onto the freeway is capable of accelerating at 5.50 m/s2. If the car is currently traveling forward at 13.0 m/s, what is the shortest amount of time it could take the vehicle to ...

*September 19, 2011*

**calculus**

0,-1/2

*September 19, 2011*

**physics**

a driver of a car traveling at 15.6 m/s applies the brakes causing a uniform deceleration of 2.1 m/s squared. how long does it take the car to accelerate to a final speeed of 10.9 m/s. answer in units of seconds

*September 18, 2011*

**physics **

a car enters the freeway with a speed of 5.6 m/s and accelerates uniformly for 2.7 km in 3.0 minutes.How fast is the car moving after this time? answer in units of m/s

*September 18, 2011*

**physics**

turner's treadmill starts with a velocity of -3.4 m/s and speeds up at regular intervals during a half hour workout. after 26 minutes the treadmill has a velocity of -7.6 m/s. what is the average acceleration of the treadmill during this period? answer in units of m/s ...

*September 18, 2011*

**physics**

a car accelerates uniformly from rest to a speed of 21.8 km/h in 5.9 seconds.find the distance it travels during this time. answer in units of meters

*September 18, 2011*

**AP Calculus AB**

If y = (((3x^2)+ 5)^5)((x+2)^4), then dy/dx = ? I've gotten to the point where i have (5((3x^2)+ 5)^4)(4(x+2)^3)(6x), what do i do next? It's a multiple choice question anf this is not one of the answers listed. Any help would be appreciated. Thanks!

*September 18, 2011*

**PALO VERDE **

SIMPLIFY [4 -1] + [-1 2] OVER [2 5] + [-2 -3]

*September 14, 2011*

**childcare**

The main difference between emergency care and first aid is the

*September 13, 2011*

**math**

polynomials (m + 7)(m - 3) + (m-4)(m+5)

*September 13, 2011*

**statistics**

A salesperson finds that, in the long run, two out of five sales calls are successful. Twelve calls are to be made. Let X = the number of concluded sales. Is X a binomial random variable? Explain!

*September 12, 2011*

**math**

arrange the following from least to greatest 3/8,2/4,6/9,9/12

*September 9, 2011*

**Mathematics optimization**

The arithmetic mean of two numbers a and b is the number(a+b)/2. Find the value of c in the conclusion of the mean-value theorem for f(x)=x^2 on any interval [a,b].

*September 3, 2011*

**physics**

nevermind!! i figured it out!

*September 1, 2011*

**physics**

Four vectors, each of magnitude 89 m, lie along the sides of a parallelogram. The angle between vector A and B is 77◦. A 89 m C 89 m B 89 m D 89 m What is the magnitude of the vector sum of the four vectors? Answer in units of m I got 346.8757431m, but that's not ...

*September 1, 2011*