Saturday

April 25, 2015

April 25, 2015

Total # Posts: 415

**physics**

a block weighs 200 N and is being held against a door. The coefficient of static friction between the door and the block is 0.470. What is the minimum force applied? Please show how you got it
*April 19, 2015*

**Calculus**

Correct answer is -.169
*April 6, 2015*

**math**

$1000-$800=$200 $200/$800=1/4 or 25% profit
*April 3, 2015*

**chemistry**

A 50.0 mL sample of 0.50 M HBr is titrated with 0.25 M KOH. What is the pH after the addition of 60.0 mL of KOH? A) 4.1 B) 13.4 C) 1.7 D) 2.0 E) 7.7 I'm confused on the process of solving this problem. My work so far: .050L X .50 mol/1L= .025 mol HBR .060L X .25 mol/1L= ....
*April 3, 2015*

**Chemistry**

A volume of 80.0mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , what is the mass of the steel bar? Use the following values: specific heat of ...
*February 25, 2015*

**Math**

A drawer contains 20 black socks and 20 white socks. If the light is off and you reach into the draw to get your socks, what is the minimum number of socks you must pull out in order to be sure that you have a matching pair?
*February 15, 2015*

**science**

by way of negative feedback and homeostasis
*February 5, 2015*

**math**

I don't know
*February 3, 2015*

**math**

Mabel is installing a square pool in her backyard and wants a circular fence to enclose the pool to create 4 grassy areas around the pool as show in the figure. If the pool is located at the coordinates (1, 5), (5, 8), (4, 1), and (8, 4), what is the amount of fencing Mabel ...
*January 4, 2015*

**Chemistry**

1.) Can you explain to me how Faraday's Constant works in electrolytic cells? (We did a lab experiment on copper wires and sulfuric acid, collecting H2 gas.) I'm not sure how to answer the question. 2.) Does copper conduct more electricity than platinum? Why or why not?
*December 9, 2014*

**MATH**

Janet dreams to go on vacation in three years. How much should she invest now so that she will have $15,000 by that time if the account earns 1 3/8% compounded quarterly?
*November 24, 2014*

**Math**

You invest $5,000 at 3% monthly for 15 years. How much interest will you earn?
*November 24, 2014*

**Math**

Tom Invested $7,000 at 6.5% interest compounded monthly. How much will be in this account after 18 months?
*November 24, 2014*

**Physics**

A billiard ball traveling at 3.00 m/s collides perfectly elastically with an identical billiard ball initially at rest on the level table. The initially moving billiard ball deflects 30.0° from its original direction. What is the speed of the initially stationary billiard ...
*November 13, 2014*

**Chemistry**

A reaction uses 4.5 grams of oxygen and an excess of nitrogen. How many grams of dinitrogen pentoxide are produced?
*October 7, 2014*

**math**

a 20 metre length of cloth is cut into two pieces in the ratio 1:9. how long is each piece?
*October 7, 2014*

**chemistry**

What is the difference between writing a COMPLETE and an INCOMPLETE equations in a) and d)?
*October 3, 2014*

**chemistry**

a.) Write the balanced complete combustion reaction for ethane (C2H6), producing CO2 and water vapour. Make sure to include phases. Also, make sure that the stoichiometric coefficients are whole numbers and are not fractions. b.) What is the enthalpy of reaction (ΔH°...
*October 3, 2014*

**Stat**

Of 84 adults selected randomly from one town, 62 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance. Please help mr solve.
*October 1, 2014*

**Stat**

Thirty randomly selected students took the calculus final. If the sample mean was 89 and the standard deviation was 6.2, construct a 99% confidence interval of the mean score of all students. Assume that the population has a normal distribution. what formula do i use????
*September 30, 2014*

**business**

32,25,c
*September 25, 2014*

**Language Arts Answer check PLEASE**

Thank you so much for the help!!
*September 12, 2014*

**Language Arts Answer check PLEASE**

Ms Sue would you double check my answers please
*September 12, 2014*

**Language Arts Answer check PLEASE**

1) What can you infer from this sentence near the start of "The Story Teller"? Most of the aunt's remarks seemed to begin with "Don't," and nearly all of the children's remarks began with "Why" A) It is a long trip to Templecombe B)the...
*September 12, 2014*

**language arts**

Yep answer is D
*September 12, 2014*

**ART HELP PLEASE**

Ok D was my second choice because I don't see a use of bright colors enough to think that about this one and I don't remember about technical skill I have never done art before and with homeschooling this is tough because we get a short lesson then all these pictures ...
*September 9, 2014*

**ART HELP PLEASE**

Its a picture Called a Portrait of a Woman by Jan Mytens and the question is This piece of art is most successful if the person critiquing considers A)creativity *** B)technical skill C) Use of bright Colors D)ability to capture emotion I think A but am really unsure
*September 9, 2014*

**Science Check PLEASE**

put ** by the ones I thought correct Which of the following statements best describes the characteristics of a hypothesis, one of the steps of the scientific method? a)It is a possible answer to a scientific question *** b) It is a scientific inquiry that cannot be tested c)...
*September 2, 2014*

**Science Check answers please**

I put ** by the ones I thought correct Which of the following statements best describes the characteristics of a hypothesis, one of the steps of the scientific method? a)It is a possible answer to a scientific question *** b) It is a scientific inquiry that cannot be tested c)...
*September 2, 2014*

**English Check my answers please**

Any help please!
*September 2, 2014*

**English Check my answers please**

1. In “Raymond’s Run,” which detail supports the prediction that Squeaky will not let Gretchen win the race? (1 point) I put * marks by ones I thought Squeaky is insulted when Mr. Pearson suggests she give someone else “a break” this year. Squeaky ...
*September 2, 2014*

**chemistry**

Gallium is a metal with a wide variety of uses. Some of its applications include computer memory chips, light emitting diodes and lasers. Radioactive isotopes of gallium are used to image the human body and locate tumors. Naturally occurring gallium consists of two isotopes. ...
*August 29, 2014*

**english**

how many adjectives are in this sentence? two large oaks covered your evergreens.
*July 2, 2014*

**Science**

What is oxygen made of
*June 19, 2014*

**Biology**

How much heat is needed to raise the temperature of 20g of copper from 20 degrees celcius to 40 degrees celcius? (The specific heat of copper is 385J/Kg degrees celcius)
*June 5, 2014*

**finance**

A bond that has a $ 1,000 par value (face value) and a contract or coupon interest rate of 10.5%. The bonds have a current market value of$ 1,124 and will mature in 10 years. The firm's marginal tax rate is 34%
*May 7, 2014*

**finance**

a bond that has a $1,000 par value (face value)and a coupon interest rate of 10.1% the bonds have a current market of $1,127 and will mature in 10 years the firm marginal tax rate is 34% the cost of capital from this debt is
*May 6, 2014*

**finance**

a bond that has a $ 1,000 par value ((face value)) and a coupon interest rate of 10.1% the bonds have a current market value of $1,127 and will mature in 10 years the firm's marginal tax rate is 34% the cost of capital from this debt is %
*May 6, 2014*

**consumer math**

A person selecting a bank will consider how convenient it is, how safe it is, and how secure their return is true false
*April 30, 2014*

**math**

so we are looking at 24 times an outcome of 5 can be expected?
*April 25, 2014*

**math**

The table below shows the results of an experiment in which a number cube was tossed 20 times. Outcome of toss: 1 2 3 4 5 6 Number of times Outcome Occurred: 4 1 5 5 2 3 (table reads: outcome of toss 1=4number of times,2=1,3=5,4=5,5=2,and6=3) Based on these results, if the ...
*April 25, 2014*

**physics **

Mary is standing at a place such that she makes an angle of 42° to the right of the normal of a mirror. Where should Mary's mom stand so that she can best see Mary's reflection in the mirror?
*April 9, 2014*

**math**

Jim paid $ 5.55 for 1 notepad and 7 pencils. Anne paid $ 12.28 for 3 notepads and 2 pencils. How much does each notepad cost? Show all work. Thanks
*April 7, 2014*

**math**

you have a 2.5 od pipe can you get the same flow from two 1.and a quarter od pipe
*March 29, 2014*

**physics**

What is the pressure that is exerted by a box tjat has a dimension of 12cm long and 14cm wide and has a force of gravity on the box of 40N?
*March 25, 2014*

**chemistry**

How do I determine how many moles of KMnO4 it takes to neutralize C2O4-?
*March 25, 2014*

**math**

simplifies (8+12)5/6-5A+11
*March 18, 2014*

**Algebra**

Solve using FOIL (y-2) (3y3-5y+7)
*March 17, 2014*

**algebra**

(4a2+9b5) - (-2a2-6b5)
*March 17, 2014*

**math**

5, 6
*March 17, 2014*

**algebra**

Evaluate each polynomial for the given value of the variable. –x2-5x+6; x= -3 2x2-4x-1; x= 5
*March 16, 2014*

**algebra**

Simplify (x^3y^4/z^6)^2 (a^0b^6)^0 (-2x)^-6 (4^2)^3 (x/3)^4
*March 16, 2014*

**math**

Two sides of an equilateral triangle have lengths x+2 and -2x+20 which could be the length of the third side:14-x or 2x+4? A. 14-xonly B. Both 14x and 2x+4 C. 2x+4 only. D. Neither 14-x nor 2x+4
*March 10, 2014*

**algebra**

Stacy wants to build a triangular sand box for her son. Using the figure below, calculate the area of the triangular box, writing the answer as a polynomial. (Hint: A=1/2bh) x+2 7x-1 2x+6
*March 9, 2014*

**algebra**

Sam needs to fill up a box with packaging material. Use the picture below to calculate the volume of the box. 2x+3 x-3 x+2
*March 9, 2014*

**algebra**

Add polynomials (4y+5y2) + (2y3-8y2)
*March 9, 2014*

**algebra**

. Victoria wants to plant a vegetable garden in the shape of a square. She has a space allocated in her backyard that will accommodate 175 square feet. Using the drawing below, use the FOIL method to find the polynomial that represents the area of the square. If x=6, will she ...
*March 9, 2014*

**algebra**

John wants to hire an editor to check his thesis paper. The editor charges a flat rate of $50 and $2 per page. Write a polynomial to describe the cost. Find the cost of editing 75 pages.
*March 9, 2014*

**algebra**

Is (x+y)2 equal to (x2+y2)? Explain why or why not using an example to support your answer.
*March 9, 2014*

**algebra**

(5.2 x 1013) (7.1 x 10-22) write the answer in scientific notation
*March 9, 2014*

**MAT-134 Math XL**

Factor out the greatest common factor. Simplify if possible. 9x^6-63x^5+36x^4=
*March 6, 2014*

**MAT-134 Math XL**

factor out the gcf simplify if possible. 3x^7 - 9x^6 + 24x^5
*March 5, 2014*

**algebra**

Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts.
*March 4, 2014*

**Algebra**

Terry is mailing two boxes. Together they weigh 21 lbs. If the smaller box is 5 lbs. less than the larger one, how much does each box weigh? Write and solve an equation that models this scenario.
*March 4, 2014*

**algebra**

The sum of two numbers is 30 and their difference is 2. Find the two numbers by writing and solving a system of equations.
*March 4, 2014*

**algebra**

A music concert was attended by 450 people. Adult tickets sold for $70 and children’s tickets for $40. If total sales were $27,750, how much of each ticket was sold?
*March 3, 2014*

**algebra**

Rachel has 15 coins with a value of $2.85. If the coins are either dimes or quarters, how many of each coin does she have? Write and solve using a system of equations
*March 3, 2014*

**algebra**

x=6y+2 3x-18y=4
*March 1, 2014*

**algebra**

Peter is throwing a surprise party for his friend Tammy. He has a budget of $350. If the restaurant charges $20 per person for drinks and food and a cleanup fee of $35, what is the maximum number of people that he can invite to stay within budget? Write and solve an inequality.
*March 1, 2014*

**algebra**

The Parker’s are installing a wooden fence in their backyard. They have 330 feet of wood. The length can be no more than 90 feet. Write and solve an inequality to find the maximum width of the fence.
*March 1, 2014*

**math**

The tax on a purchase was $9.33. If the sales tax rate is 6%, how much was the purchase?
*March 1, 2014*

**Math**

I have a similar problem The LCM of two numbers is 36. The GCF is 6. One number is 6 more than the other. The numbers are ------- and ------. If someone could show me how to do this one, I could figure out the other 5 I have to do (maybe) Thank you very much.
*February 25, 2014*

**Physics**

In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. The horizontal distance between the buildings is 40.0 m, and the heights of the Jackson and Walton buildings are, respectively, ...
*February 16, 2014*

**MAT-134 Math XL**

Graph the following linear equation using one of the following methods: 1st slope intercept form y = mx + b 2nd table of values 3rd x-intercept and y-intercept 1. 3x + 4y = 12
*February 13, 2014*

**math **

Eric and Madison both measured the same trading card. Eric says the card is 3 inches long. Madison says it is 2 3/4in long. The teacher says they are both right. How is this possible?
*January 28, 2014*

**Math**

can you show me how 7 friends share 3 liters of soda equally?
*January 13, 2014*

**Math**

How would 7 people share 3 liters of soda equally?
*January 13, 2014*

**Social Studies**

My answer is D
*January 3, 2014*

**Social Studies**

Advances in all of the following except ____ have led to rapid population growth in recent years. A. Sanitation B. Farming Methods C. Medicine D. Computers
*January 3, 2014*

**PHYSICS IMP PLS**

You should use the equation dv = -v_ex*ln(m_f/m_i). You need to determine how much fuel is burned throughout the first 145 seconds, than substract that number from the initial mass to get m_f. After that, to find a, you need to find the derivative of the above equation. (You ...
*December 8, 2013*

**College Algebra**

1. 2log8^x=log8(4x+12) both log bases are 8. I have no clue what to do. 2. 1/2ln (x) -3 ln y - ln (z-2) so far for this second one i have ln sqrt(x)-ln y^3 - ln (z-2) dont know what to do next
*December 4, 2013*

**College Algebra**

Find a Quadratic polynomial function with real coefficients satisfying the given conditions. -4 and 3 are zeros; f(1) = -30 HELP. I have no idea.
*November 25, 2013*

**Chemistry**

Oxygen gas can be generated by heating KClO3 in the presence of some MnO2. 2KClO3 → 2KCl + 3O2 If all the KClO3 in a mixture containing 1.58 g KClO3 and 0.30 g MnO2 is decomposed, how many liters of O2 gas will be generated at T = 25.0°C and P = 760.6 torr?
*October 27, 2013*

**physics**

.019M
*September 22, 2013*

**chem**

if a rock climber accidentally drops a 56 gram piton from a height of 375 meters, what would its speed be before striking the ground ignore the air resistance
*August 22, 2013*

**physics**

A 1310-kg car is being driven up a 9.12 ° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of 541 N. A force F is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act ...
*July 8, 2013*

**chem word problem **

.A gas at 72 °C occupies 10 L. What is the temperature in Kelvin when it expands to a volume of 22 L? Round to the nearest whole number and don't forget the units. is it charles or boyles law? my answer cam out to be 6.7k but i know its wrong
*May 23, 2013*

**Geometry**

the vertices of a parallelogram are a(3,-1),b(4, 3),c(7, 5), and d(6, 1). at what point do the diagonals intersect?
*May 9, 2013*

**Math**

help
*May 6, 2013*

**math**

Jenny borrowed $500 for five years at 4 percent interest, compounded annually. What is the total amount she will have paid when she pays off the loan?
*April 16, 2013*

**Physics**

An electric space heater draws 15.5 A from a 120 V source. It is operated, on the average, for 4.0 h each day. (b) How much energy in kWh does in consume in 30 days? (c) At 11 per kWh, how much does it cost to operate the heater for 30 days?
*April 15, 2013*

**Physics**

A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half its original value. (a) What is the potential difference across the lamp? (b) How much resistance was added to the circuit? (c) How much power is now ...
*April 14, 2013*

**Physics**

A circuit contains six 270 lamps and a 18.0 heater connected in parallel. The voltage across the circuit is 120 V. (a) What is the current in the circuit when four lamps are turned on? (b) What is the current in the circuit when all lamps are on? (c) What is the current in the...
*April 14, 2013*

**Physics**

A transistor radio operates by means of a 9.0 V battery that supplies it with a 40 mA current. (a) If the cost of the battery is $0.50 and it lasts for 300 h, what is the cost per kWh to operate the radio in this manner? (b) The same radio, by means of a converter, is plugged ...
*April 14, 2013*

**Math-Help**

Where did you get 1263 from>?
*April 1, 2013*

**physics**

The curved artery can be approximated as a semicircular arch whose diameter is 4.9 cm. If blood flows through the aortic arch at a speed of 0.35 m/s, what is the magnitude (in m/s2) of the blood's centripetal acceleration?
*March 27, 2013*

**physics**

Two charges, qA and qB, are separated by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions. (a) What new force will exist if qA is doubled? (b) What new force will exist if qA and qB are cut in half? (c) What new ...
*March 20, 2013*

**physics**

A strong lightning bolt transfers about 26 C to Earth. How many electrons are transferred?
*March 20, 2013*