Wednesday
August 20, 2014

Posts by Daniel


Total # Posts: 813

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

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

calculus
I am trying to find equation of the tangent line to the curve 2/(1-3x) at x=0 using the definition. I applied it into the formula lim h->0 [f(a+h) - f(a)]/h which gave me [2/(1-3x+h) - 2/(1-3x)]/h I took the conjugate and came with [4/(1-3x+h)^2 - 4/(1-3x)^2] / h(2/(1-3x+h...
October 1, 2011

calculus
Thanks a lot!
October 1, 2011

calculus
sqrt(x^2 - 9) / x I need to solve this using the definition of a derivative [f(a+h) - f(a)]/h I can't seem to get it :\
October 1, 2011

math
use your calculator.show 14. broken keyr is 1. show 2 ways
September 21, 2011

physics
If a 2000 pound train tilts of a 20 foot cliff at a 135 angle how long will it take to reach the ground?
September 21, 2011

Math
calculate lim┬(√(x^2+y^2)→∞)⁡〖(sin⁡(x^2 y^2))/(2x^2+3y^2 )〗
September 19, 2011

physics
Good study tips for physics? I am having trouble understanding the theory and how to apply it into the equations. People have told me I should not just punch in numbers, but I do not know what to do besides that; I treat it like math.
September 18, 2011

calculus
Why is it that when Lim x -> 0^- the |x| = -x?
September 18, 2011

Math
(actually sorry, it's 17+44, I made a mistake. That is equal to 61)
September 13, 2011

Math
Easy. Ok "Half the boys said....yes" which means half said no. 17 said no so that means 17 out of 34 boys know to swim. Now for the girls, we know there are 34 boys so that leaves 66 girls total. 66 multiplied by 2/3 is 44. (44 girls said yes.) 44+34= 78. Therefore ...
September 13, 2011

Math grade 9ish
Evan is 1.8 metres tall. He walks between two lampposts that are 5 metres apart and notices his shadow from one of the lampposts just touches the base of the other. He also notices that the ratio of his height to the height of the lamppost is 2 to 5. How far is he from each ...
September 13, 2011

ENG125
Well, poetry can have different topics. Most people think poems HAVE to rhyme. Sometimes, they don't. Here is an example of a rhyming poem:Roses are red,Violets are blue,I know how to rhyme,And so do.
September 1, 2011

health care management
Networks and alliances are marriages of money and convenience. Systems are marriages of commitment and values. Develop arguments and counterargements for each statement.
August 27, 2011

Finance
Supposed you owned a portfolio consisting of $25,000 of US government bonds with a maturity of 30 years. Would your portfolio be riskless?
August 21, 2011

Alegbra
2. The Sugar Sweet Company is going to transport its sugar to market. It will cost $4200 to rent trucks, and it will cost an additional $150 for each ton of sugar transported. Let C represent the total cost (in dollars), and Let S represent the amount of sugar (in tons) ...
August 18, 2011

shortest route
from immediate predec duration a 2 b 5 c a 3 d b 6 e a,b 4.00
August 4, 2011

Biology
The article is presented by HomeworkEasy experts out of five years of stead fast dedication to help students with their biology assignments, homework and projects. Origins of biology as a field are expounded and the academic possibilities are briefed. The spicy narration oh ...
July 11, 2011

Math
How many positive 3-digit integers contain only odd digits?
July 10, 2011

physics
given that the radius of the earth is 6.37×10^3km and the period of revolution of the moon round the earth is 27.3 days, calculate the average distance from the earth to the moon.
July 5, 2011

pre algebra
thank you
July 5, 2011

pre algebra
23/50 of 50 2/3 show steps please
July 5, 2011

chemistry
How would I calculate the molarity of the resulting solution if 25.0mL of 1.50 M HCL solution is diluted to 500 mL. I know you have to change the milliliters to liters by dividing by 1000 and I know that M= Moles of Solute/Liters of Solute but after that I'm lost. Please ...
July 1, 2011

Math
How many liters of water should be added to 20 liters of 40% solution of acid to obtain 30% solution?
June 27, 2011

Finance
The essentiality of finance in the practical world and its applicable evolution is discussed in detail. Accompanying fields such as accounting, economics, audit etc; are discussed in brief. The article throws light on the allied practices of financial management and possible ...
June 24, 2011

english
1.Type the appositive(s) in each sentence. You do not need to include the commas. Sam, our cat, is too lazy to catch mice. 2. Type the appositive(s) in each sentence. You do not need to include the commas. Our cat Sam is too lazy to catch mice 3. Type the appositive(s) in each...
June 22, 2011

english
Locate the adverb phrase and the adjective, verb, verb phrase, or other adverb modified. We stopped near a mountain stream.
June 22, 2011

math
Two circles with radii 3cm and r cm touch each other externally. If their common tangent is 8cm long,what is the value of r?
June 15, 2011

Chemistry
the equation of the line for a graph of voltage versus log[Cu2+] was y= - 0.0179x - 0.0015. The voltage of a solution with an unknown [Cu2+] was measured against the same reference cell, under the same conditions; the voltage was found to be 0.012 V. Determine the [ Cu2+] of ...
June 14, 2011

Marketing
How do we incorporate social and cultural forces in marketing systems?
June 10, 2011

english
Identify the complete adjective clause and the word it modifies. Many Californians who own homes live on hillsides.
June 9, 2011

english
Identify the complete adjective clause and the word it modifies. This course deals with facts that everyone should know.
June 9, 2011

english
Identify the complete adjective clause and the omitted introductory word. Is he the man you saw at the coffee shop?
June 9, 2011

english
Identify the complete adjective clause and the omitted introductory word. The car I drive has 50,000 miles on the odometer.
June 9, 2011

English
Identify the complete adjective clause and the word it modifies. I elected to take astronomy, which is not a required course.
June 9, 2011

Physic
what is the focal length of a plane mirrior which is 4m tall?
June 9, 2011

Social Studies
What is agricultural transition?
June 5, 2011

runways
IF THE LENGTH OF THE RUNWAY IS 6 INCHES, WHAT IS THE PERIMETER?
June 3, 2011

math
if m+2/5=1/2If , then which of the following is true? 2m + 4 = 5 m + 2 = 2 2m + 2 = 5 m + 4 = 6
May 31, 2011

English
As the headboy of your school write a speech on the send forth party of the principal of your school.
May 23, 2011

Trig
cos4x*cos3x + sin4x*sin3x
May 22, 2011

math
solve 3x - 5 + x = 31.
May 20, 2011

math
Emily and Miranda are standing outside. Emily is 5 feet tall and casts a shadow of 28 inches. Miranda's shadow is 29.4 inches long. Approximately how tall is Miranda?
May 19, 2011

math
A tree casts a shadow of 28 feet. At the same time, a biologist who is 7 feet tall casts a shadow of 2 feet. How tall is the tree?
May 19, 2011

math
A double recipe of cookies calls for 5 cups of flour. Which of the following proportions could be used to find the amount of flour for a triple recipe? 5/2= f/3 2/5=f/3 2/3 = f/5 3/2=5/f
May 19, 2011

math
Which of the following is the equation of a direct variation that has a constant of variation equal to -? y = x - -y = x y = -2x y = -x
May 19, 2011

math
Which of the following sets of ordered pairs is not a direct variation? (0, 0); (-2, 4); (3, -6) (1, 1); (-2, -2); (3, 3) (10, 2); (15, 3); (20, 4) (0, 0); (1,
May 19, 2011

physics
If the initial velocity of the car in the previous problem (the car accelerates at 5.00 km/hr/s for 3.50 sec) is 22.6 km/hr, what is the final velocity of the car?
May 18, 2011

Physics
A car experiences an average acceleration of 5.00 km/hr/s for 3.50 sec. What is the change in velocity of the car?
May 18, 2011

Physics
An ostrich runs north in a straight line for 21 meters. She then turns around and runs 25 meters back toward her nest (south) on the same path. What is her displacement?
May 18, 2011

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