Friday

January 20, 2017
Total # Posts: 1,075

**math**

Ross ran a mile in 6.28 minutes to win a race.Don finished second with a time of 6.55 minutes.How much faster was Ross than Don?

*March 19, 2012*

**physics**

A convex mirror in an amusement park has a radius of curvature of 3.00m. A man stands in front of the mirror so that his image is half as tall as his actual height. At what distance must the man focus his eyes in order to see his image? I calculated the focal length using f...

*March 17, 2012*

**physics**

The drawing shows a copper wire (negligible resistance) bentinto a circular shape with a radius of 0.48 m. The radial sectionBC is fixed in place, while the copper bar ACsweeps around at an angular speed of 16 rad/s. The bar makeselectrical contact with the wire at all times. ...

*March 12, 2012*

**calculus**

I'm confused as to how you got d =2 and x=sqrt(3)

*March 4, 2012*

**calculus**

A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and figured out I need to ...

*March 4, 2012*

**chemistry**

A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^-5

*March 4, 2012*

**calculus**

Alright thanks

*March 3, 2012*

**calculus**

Implicit Differentiation question x^y = y^x I was wondering if I was right in the steps I was taking first was to take the Ln or both sides making it y Ln(x) = x Ln(y) then just taking the derivatives of both sides using product rule twice y/x + y'Ln(x) = xy'/y + ln(y...

*March 3, 2012*

**physics**

What is the kinectic energy of a body of mass 2000kg moving with a velocity of 10m/s

*February 29, 2012*

**physics**

A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right corner is zero. Find ...

*February 22, 2012*

**math**

how can you use subtraction to complete a addition pattern.

*February 19, 2012*

**physics**

remove the brackets to see the diagram sorry

*February 19, 2012*

**physics**

Five styrofoam balls are suspended from insulating threads.Several experiments are performed on the balls and the followingobservations are made: I. Ball A attracts B and repels C II. Ball D attracts B and has no effect on E III. A negatively charged rod attracts both A and E ...

*February 19, 2012*

**physics (Right Hand Rule Question)**

A proton traveling due east in a region that contains only a magnetic field experiences a vertically upward force away from the surface of the earth. What is the direction of the magnetic field? a)North b)East c)South d)West e)Down I know I need to use the right hand rule to ...

*February 17, 2012*

**physics**

Thanks for the help, but I don't quite understand why you chose to multiply everything together.

*February 16, 2012*

**physics**

A proton moves in a constant electric field from point A to point B. The magnitude of the electric field is 6.4 × 10^4 N/C; and it is directed as shown in the drawing, the direction opposite to the motion of the proton. If the distance from point A to point B is 0.50 m, ...

*February 16, 2012*

**Finance**

What is the economic value today of each of the following payment streams if money can earn 7.5%?(Note that the two streams have the same total nominal value.) a. $1000, $3000, and $2000 due in one, three, and five months, respectively. b. Two $3000 payments due two and four ...

*February 14, 2012*

**literature**

Dez sweaty Testicles

*February 14, 2012*

**College Algebra**

Find the value of the missing variable P=4s ; s=32

*February 9, 2012*

**Chemistry**

When 0.100 mol of CaCO3 (s) and 0.100 mol of CaO (s) are placed in an evacuated container with a volume of 10.0-L and heated to 385 K, PCO2 = 0.220 atm after equilibrium is established: CaCO3(s) ⇌ CaO (s) + CO 2 (g) An additional 0.300 atm of CO2 (g) is pumped in. What ...

*February 9, 2012*

**Chemistry**

As an environmental chemist, you want to find the Kc for the following reaction: 2 NO2 (g) ⇌ N2 (g) + O2 (g) Kc = ? Use the following data to find the unknown Kc : ½ N2(g) + ½ O2(g) ⇌ NO (g) Kc = 4.8 x 10-10 2 NO2(g) ⇌ 2 NO (g) + O2 (g) Kc = 1.1...

*February 9, 2012*

**arithmetic**

The sum of the first 10th term of an a.p is 255,the sum of the first 20 term is 1010.find the next 2020 term of the progression

*January 31, 2012*

**Physics**

A cheetah running at 30 m/s is pursuing a zebra going in a straight line at 14 m/s. If the zebra has a 35 m head start, how much time does it take for the zebra to catch up? (Please show all work. I know the answer, but I need the step by step instruction to understand.)

*January 30, 2012*

**calculus**

Consider the function f(x) = piecewise [(x^3)(cos(1/x)) , x=/=0], [0, x=0]. Use the definition of the derivative at a point to determine if f is differentiable at x=0 I am not sure how to start this question. Am I supposed to plug in x = 0?

*January 29, 2012*

**physics**

A student tries to produce notes of higher frequency by blowing a trumpet harder Discuss whether he will succeed?

*January 29, 2012*

**math**

700.00

*January 25, 2012*

**Physics**

workings

*January 23, 2012*

**math**

explain the difference between the expressions x-3 and 3-x

*January 20, 2012*

**Help!!!**

the angle of elevation from the top of an office building in makati to the sm appliance center is 68 degree , while the angle of depression from the top of the office building to the bottom is 63 degree the office building is 290 feet from the sm appliance center. find the ...

*January 19, 2012*

**geometry**

given: 12x over 8+17=117 prove: x=150

*January 18, 2012*

**geometry**

given: 4x+8 over 2 equals 9 prove: x= 5 over 2

*January 18, 2012*

**Math**

What is the constant of variation? An x-y table shows the following coordinate pairs: four comma fifteen, five comma twelve, and six comma ten. Answer 1 3 thirty sixty I have been stuck on it all day. I am in urgent need of help

*January 11, 2012*

**Math**

every time Mr Frank buys 4 pots of flowers for the float, the flower shop will give him 1 pot free.After 4 weeks, he had 50 pots of flowers.How many pots did he get free?

*January 11, 2012*

**MIPS Assembly programming**

Hi there, I need to implement in assembly mips an iterative binary search method. Here's my code: # this program implements binary search # the equivalent pseudo code is the following: # first = 0 # last = size -1 # while (last - first > 1) { # mid = (last-first)/2 + ...

*January 7, 2012*

**Physics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 ...

*January 5, 2012*

**Pysics**

Realizing that she often doesn't have her students' full attention during class, a professor devises an elaborate device on which to stand while she lectures. The pulley is placed so that the string makes a 45.0-degree angle with the beam. The beam is uniform, 5.00 ...

*January 5, 2012*

**algebra 2**

x intercepts of f(x)15x^2-12x-48

*January 4, 2012*

**world geography**

Two U.S. West Coast ports are world ports that connect the United States and Asian markets. They're Los Angeles/Long Beach and

*December 26, 2011*

**world geography**

i need the answers to Geography Essentials, Europe, And Russia And Its Neighbors and East Asia And Southeast Asia and South Asia, Northern Africa, And Southwestern Asia Sub-saharan Africa, Australia,oceania, And Antartica Latin America And North America i studied and i didn&#...

*December 26, 2011*

**ALGEBRA**

Find three ordered pairs that satisfy the equation. y=5x+8

*December 18, 2011*

**ALGEBRA**

Suppose the modified quota is 5.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e...

*December 18, 2011*

**calculus**

Oh also if you can, how do you find d2y/d2x for parametrics?

*December 16, 2011*

**calculus**

Find an equation of the tangent(s) to the curve at a given point. Then graph the curve and the tangent(s). x = 6sin(t), y = t^2 + t; (0,0) How do I do this without the value of t? I don't see a way to eliminate the parameter.

*December 16, 2011*

**calculus**

Thank you!

*December 15, 2011*

**calculus**

I don't quite understand Cartesian equations. I am told to Eliminate the parameter to find a cartesian equation of the curve. X= 3 - 4t, y= 2 - 3t there is no inequality I don't understand what I am trying to find.

*December 15, 2011*

**math**

a boy spends 16.5 hrs studying. he spends 0.6 hrs studying English. what percent of his time is spent on English

*December 11, 2011*

**ALGEBRA**

You are playing Texas Hold’em against one other opponent. Your two down cards are 6 of (diamonds) & 7 of (diamonds). The first three cards to come up are 3 of (diamonds), 4♣ 9♠. The next card to come up is 10 of (diamonds). You and your opponent have both ...

*December 6, 2011*

**Biology**

4)You count your cells and have 8x10ᶺ5 viable cells/ml you want to see (dilute the cells) to end up with 2x10ᶺ5 viable cells/ml. What volume of cells will you put into 20 ml?

*December 6, 2011*

**chemistry**

4)You count your cells and have 8x10ᶺ5 viable cells/ml you want to see (dilute the cells) to end up with 2x10ᶺ5 viable cells/ml. What volume of cells will you put into 20 ml?

*December 6, 2011*

**Chemistry**

3)How many grams of sodium chloride do you need to weigh out to prepare 1.4L of 0.9% NaCL solution?

*December 6, 2011*

**Chemistry**

2)How to prepare 5.6 liter of 50 mM NaCL solution (mol wt 58.44) using 10% NaCL stock solution?

*December 6, 2011*

**Chemistry**

1) Calculate the amount of sodium chloride, NaCL (mol wt 58.44) and potassium chloride; KCL (Mol wt 74.56) needed to prepare 500 ml of 1.25 NaCL/10 mM kcl solution dilutions in water.

*December 6, 2011*

**calculus**

Anti Derivative of F''(x) = 4 + 6x + 24x^2, f(0) = 3, f(1)=10 Not sure how to find the value of the constant for F'(x).

*December 6, 2011*

**ALGEBRA**

Andy draws the question card, “How many 7s do you see?” He answers, “one,” because he cannot see the 7 on his own head; he sees only the 7 on Belle's head. Next Belle draws the question card, “ Of the four even numbers, how many different even ...

*November 30, 2011*

**ALGEBRA**

Andy draws the question card, “How many 7s do you see?” He answers, “one,” because he cannot see the 7 on his own head; he sees only the 7 on Belle's head. Next Belle draws the question card, “ Of the four even numbers, how many different even ...

*November 30, 2011*

**ALGEBRA**

A newspaper article discussing whether Social Security could be cut offered the information shown in the figure. Use the information in these graphs to answer the question. How many workers pay into Social Security for each person getting benefits in 2000? persons

*November 28, 2011*

**ALGEBRA**

A newspaper article discussing whether Social Security could be cut offered the information shown in the figure. Use the information in these graphs to answer the question. What is the difference between the amount of money collected from Social Security taxes and the amount ...

*November 28, 2011*

**E-COMMERCE**

Please give me a hint on how to solve the scenario

*November 28, 2011*

**E-COMMERCE**

Imagine that you own a small, local clothing store along the Jersey Shore boardwalk and decide that you want to engage in e-Commerce. Write a 4-5 page paper on the following: 1. Imagine that someone has offered you $1,000 to buy your domain name shortly after your started your...

*November 28, 2011*

**ALGEBRA**

A single card is drawn from a standard deck of cards. Find the following probabilities. A face card is a jack, queen, or king.

*November 27, 2011*

**ALGEBRA**

What are the odds in favor of drawing a card lower than a 5 from an ordinary deck of cards?

*November 27, 2011*

**ALGEBRA**

Dice is a popular game in gambling casinos. Two dice are tossed, and various amounts are paid according to the outcome. In a certain game, if a four or eleven occurs on the first roll, the player wins. What is the probability of winning on the first roll?

*November 27, 2011*

**ALGEBRA**

What is the probability of obtaining exactly five heads in six flips of a coin, given that at least one is a head?

*November 27, 2011*

**ALGEBRA**

Find the probability whose odds against are given in the problem. Odds against are 1 to 3.

*November 27, 2011*

**ALGEBRA**

What is the probability of obtaining a sum of at least 4 when rolling a pair of dice?

*November 27, 2011*

**ALGEBRA**

Dice is a popular game in gambling casinos. Two dice are tossed, and various amounts are paid according to the outcome. In a certain game, if a four or eleven occurs on the first roll, the player wins. What is the probability of winning on the first roll?

*November 27, 2011*

**ALGEBRA**

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $500 balance, 20% rate, $400 payment, adjusted ...

*November 27, 2011*

**ALGEBRA**

Determine the comparable interest rate for a $50,000 loan when the quoted information is 12.2% + 0.5 pt + $300. (Round your answer to two decimal places.)

*November 27, 2011*

**ALGEBRA**

Round this answer to the nearest tenth please. 0.1903

*November 27, 2011*

**ALGEBRA**

Evaluate the following expression. _(6)P_2 =

*November 27, 2011*

**ALGEBRA**

Evaluate the expression. \( _4^9 \) \( _3^4 \) \( _1^3 \)

*November 27, 2011*

**ALGEBRA**

If $450 is invested in an account that earns annual interest of 3.5%, compounded semiannually, what will the account balance be after 15 years? (Round your answer to the nearest cent.)

*November 26, 2011*

**ALGEBRA**

Find the amount of interest and the monthly payment for the loan. Purchase a living room set for $3,800 at 12% add-on interest for 2 years. (Round your monthly payment to the nearest cent.)

*November 26, 2011*

**algebra**

Find the ending balance in an account that opens with $6,000, earns 4.5% interest compounded quarterly, and is held for 10 years. (Round your answer to the nearest cent.)

*November 26, 2011*

**math**

Convert the following credit card rate to the APR. Oregon, 1 3/4% per month

*November 26, 2011*

**math**

Calculate the monthly finance charge for the following credit card transaction. Assume that it takes 10 days for a payment to be received and recorded and that the month is 30 days long. (Round your answer to the nearest cent.) $500 balance, 20% rate, $400 payment, adjusted ...

*November 26, 2011*

**math**

In a recent survey of 100 women, the following information was gathered. 33 use shampoo A. 37 use shampoo B. 49 use shampoo C. 12 use shampoos A and B. 5 use shampoos A and C. 9 use shampoos B and C. 2 use all three. Use the figure to answer the question in the problem.

*November 26, 2011*

**calculus**

Sketch the curve y = x^3 - 12x^2 + 36x I already did the question properly it is concave down at (0,4) and concave up at (4,infinity) I found the abs max to be (2,32) and abs min to be (6,0) What I wanted to know is when labeling the graph should I label the max/min as abs/...

*November 21, 2011*

**calculus**

The top and bottom margins of a paster are each 6 cm and the side margins are each 4cm. If the area of printed material on the poster is fixed at 384cm^2, find the dimensinos of the poster with the smallest area. I would like to know if my work is correct. x = width of print y...

*November 20, 2011*

**calculus**

Wouldn't the equation for the perimeter be 2x + 4r + πr = 30? Since there are two lengths?

*November 20, 2011*

**calculus**

A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 30ft, find the dimensions of the window so that the greatest possible amount of light is admitted. I keep screwing up in creating my equation. p = perimeter of window l...

*November 20, 2011*

**Physics**

A 1230 kg car drives along a city street at 31.0 miles per hour, and a baseball has a mass of 0.142 kg. What speed must the baseball have if its momentum is to be equal in magnitude to that of the car? Give your result in miles per hour.

*November 19, 2011*

**Physics**

A honeybee with a mass of 0.175 g lands on one end of a popsicle stick. After sitting at rest for a moment, the bee runs toward the other end with a velocity 1.41 cm/s relative to the still water. What is the speed of the 5.20-g stick relative to the water? (Assume the bee'...

*November 19, 2011*

**Physics**

A young hockey player stands at rest on the ice holding a 1.3-kg helmet. The player tosses the helmet with a speed of 4.6 m/s in a direction 13° above the horizontal, and recoils with a speed of 0.27 m/s. Find the mass of the hockey player.

*November 19, 2011*

**Physics**

A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.

*November 19, 2011*

**Physics**

A 821-kg car stopped at an intersection is rear-ended by a 1810-kg truck moving with a speed of 11.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.

*November 19, 2011*

**Comprehension**

The sweater-------- looks best on you is the red one. Which pronoun do I use

*November 9, 2011*

**Algebra**

Luisa mows lawns during the summer. She charges $15 if she cuts the grass but charges $5 more if she also trims the grass. Last week she trimmed 5 more yards than she cut. If she made $415 last week, how many yards did she trim?

*November 9, 2011*

**calculus**

For what x-values does y=e^-x have the same slop as x+4y = 1 I am not sure what steps I am supposed to take to tackle this problem.

*November 1, 2011*

**algebra**

Dont Know they make high school harder than it should

*November 1, 2011*

**Logic**

The second paragraph.

*October 30, 2011*

**Algebra**

Find the numbers that each letter stands for. EFGHx4=HGFE E= F= G= H=

*October 30, 2011*

**calculus**

If y = f(x) = x^(p/q) then y^p = x^p show through implicit differentiation that d/dx[x^(p/q)] = (p/q)x^[p/q] Not sure how to tackle this problem.

*October 24, 2011*

**Physics**

A block of mass 2.00kg starts at rest at the top of a ramp that is inclined delta= 40.0 degrees with the horizontal. The block slides down the ramp a distance of 3.60 meters where it contacts a relaxed spring with K=300N/m. If the coefficient of kinetic friction between the ...

*October 19, 2011*

**Math**

red flag 25

*October 18, 2011*

**PHYSICS**

A car traveling at a constant velocity of 30.0 m/sec passes an intersection at time t=0. 45 seconds later a second car passes the same intersection and its traveling in the same direction at a constant velocity of 55 m/sec. when does the second car overtake the first car? how ...

*October 16, 2011*

**statistics**

Starting with a population that is normally distributed with a mean of 100 and a standard deviation of 12, answer the following questions (if possible). a. What is the probability of randomly drawing a single score between 100 and 106, p(100 < X < 106)? b. What is the ...

*October 15, 2011*

**physics**

a projectile is fired from the top of a building with an initial velocity straight upward at 40m/sec. the top of the building is 50 meters above the ground? a) the maximun height of the projectile above the building b) the time for the projectile to reach the top c) the ...

*October 15, 2011*

**calculus**

Find an equation of the tangent line to the curve at y = cosx - sinx (pi, -1) I found y'= -sinx - cosx and used the equation of the tangent y = mx +b I input the values and get -1 - [(-sinx - cosx) * pi] = b the answer says it is y = x - 1 - pi I have no idea how the ...

*October 14, 2011*

**Physics**

A Federation starship (2500000 kg) uses its tractor beam to pull a shuttlecraft (10000) aboard from a distance of 7 km away. The tractor beam exerts a constant force of 25000 N on the shuttlecraft. Both spacecraft are initially at rest. How far does the starship move (in m) as...

*October 11, 2011*