Friday
July 31, 2015

Posts by Eric


Total # Posts: 700

biology
lymphocyte
July 9, 2015

nutrition
Which of the following is one of the ways that the endocrine system interacts with the digestive system? a) Eliminates wastes generated in the body b) Transports nutrient to cells c) Controls the passage of food in the blood stream d) Secretes hormones that regulate how much ...
July 9, 2015

nutrition
Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...
July 9, 2015

nutrition
I say it is D
July 8, 2015

nutrition
Which is the best way to balance your dietary choices? a) If you overeat at lunch, you should skip dinner. b) If you eat two slices of pizza at lunch, you should walk an extra mile after dinner. c) If your dinner has no vegetables, you should eat a cereal containing fiber at ...
July 8, 2015

nutrition
Which of the following is one of the ways that the endocrine system interacts with the digestive system? a) Eliminates wastes generated in the body b) Transports nutrient to cells c) Controls the passage of food in the blood stream d) Secretes hormones that regulate how much ...
July 8, 2015

Math
there is a swimming pool, 3 meters in width and 4 meters in length. the owner wants to built a uniform deck around the swimming pool which is 3 times of the area of the pool. what's the width of the deck?
June 16, 2015

Differentail Equations
I cant figure out how to do this type of problem! Consider the first order differential equation y′+(x/(x^2−4))y=(e^x)/(x−9) For each of the initial conditions below, determine the largest interval a<x<b on which the existence and uniqueness theorem for...
June 6, 2015

History
How did the success of the civil rights movement and abolishment of slavery open doors to the election of the first Black American President of the United States, Barack Obama? Can I have some examples?
June 3, 2015

Physics
A massive steel cable drags a 20kg block across a horizontal, frictionless surface. A 100N force applied to the cable causes the block to reach a speed of 4.2m/s in a distance of 2.1m . What is the mass of the cable?
May 30, 2015

english
Cuba is one of the few remaining communist countries in the world. Since the collapse of the Soviet Bloc in 1990, however, the country has promoted capitalism in the form of tourism in order to stimulate the economy.
April 28, 2015

math
a swimming pool has an area of 40 square metres and a perimeter of 26 metres what is the length and width of the swimming pool and is it possible for a pool to have the same area but a larger perimeter?
April 11, 2015

geometry
Given: AC perpendicular BD and AB congruent CB. Prove AD congruent CD. It is a kite figure. I need statements and reasons. Problem states Plan: prove triangle ABE congruent CBE. The use congruent corresponding parts AE and CE to show right triangle AED congruent CED. AD and CD...
April 10, 2015

geometry
if m<1 = 60 degrees, then m<3 + m<5 = what? | \2| 1 \| 3 ------- | ------ 6 |\ 4 |5\ | what is the transitive property of angle congruence?
April 6, 2015

geometry
use diagram given: m<XWY = 2x+5, m<YWZ = 5x-79, and m<XWZ = 122 degrees. m<YWZ= what? (x) (y) (w) (z) connect x to w, w to z, w to y Does WY bisect ,XWZ? Please show work. Th u
April 6, 2015

Physicsl
What is the magnitude of the electric field a distance 3.5mm from an electron?
April 5, 2015

Trigonometry
1. y = 2(sin(4x - pi/8)) + 1 2. y = 4(sin((2pi/3)x - 2)) - 1 3. y = 4(sin(2x + pi/3)
April 4, 2015

math
what is 4(y*y)? is it 4y*4y, or can u not distribute, and why?
April 1, 2015

Statistics
initial dose 291.8529. 25% mark in 5.1 hours
March 13, 2015

science
What molecule found in the cell membrane serves as a communication molecule as well as involved in active transport?
March 8, 2015

physics
the work done is by lifting it up so you can use mgh The tricky part here is that you need to consider where the center of gravity is and it would be the center of the log so the COG is lifted half of the total length of the log 100kg x 9.8 N/Kg x 1.65 meters
March 5, 2015

math
Isaiah and Andy had a total of 560 trading cards. After Isaiah gave1/9 of cards to Andy they had an equal # of trading cards. How many more cards did isiah have than Andy at the beginning?
February 22, 2015

math
Oh, thanks!
February 17, 2015

math
In terms of set notation.
February 17, 2015

math
I'm looking for the symbol ', and can you send me the link to it
February 17, 2015

math
Thanks, but there is no definition for the symbol '
February 17, 2015

math
I'm doing my math hw, what does the sign ' mean for sets? Thanks
February 17, 2015

Calculus Please Help
Can you please explain these two questions to me? Suppose the population size of a predator is given by P (x) = 0.006x2 + 0.005x, where x represents the population of its prey. If the population of the prey is 10,000 at the first of January and is reduced to 6,000 by May 1 of ...
December 5, 2014

Math
Nell made a pizza. she cut the pizza into fourths. then she cut each fourth. nell and her friens ate 6 of the smaller pieces of the pizza. What fraction of the pizza did Nell and her friends eat? What fraction of the pizza did Nell and friends Not eat?
December 4, 2014

physics
A roller coaster cart of mass m = 201 kg starts stationary at point A, where h1 = 27.7 m and a while later is at B, where h2 = 7.1 m. The acceleration of gravity is 9.8 m/s 2. What is the potential energy of the cart relative to the ground at A? Answer in units of J. (201*27.7...
November 16, 2014

IBMY History 7
What can we learn from the crusades?
November 11, 2014

East and Southeast Asian
D A C A B B B D A C C D A C
November 7, 2014

Math help!
Yes your answer is correct. 9^2 * 12^2 = 225. 225 squared is 15.
October 30, 2014

math
Katrina is studying the effect of foreign substances on bacteria populations. If she introduces a beneficial substance, such as food, the bacteria population grows. If she introduces a harmful substance, such as a poison, the bacteria population decreases. The function f(x) = ...
October 30, 2014

Math
I'm sorry but I do not follow. The question asks that (out of two dice) given the first dice is even - In which the first die will therefore be 2,4, or 6 - where 6 is the only option. And so what is the probability that the sum of the two dice will equal 12 given the first...
October 20, 2014

Math
If the first dice yields an even number, what is the probability that the sum of the two dices will be equal to 12? 1st Die P(even) = 3/6 = 0.50 P(6|even) = 1/3 = 0.333 2nd Die P(6) = 1/6 = .1667 So P(12) = 0.33*0.1667 ?
October 20, 2014

Computer programming
How to build a simple game in java that will allow a player to attempt to guess a randomly generated number between 0 and 10. The player can continue guessing the number until they get it right. The game should be able to do these things: 1. Game should remember each choice ...
October 6, 2014

Chem HELP!!
Which one of the following sets of quantum numbers can correctly represent a 3p orbital? a) (n = 3 l = 1, ml = 2) b)(n = 1, l = 3, ml = 3) c) (n = 3, l = 2, ml = 1) d) (n = 3, l = 1, ml = -1) e) (n = 3, l = 0, ml = 1)
October 5, 2014

Math
You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physic. You purify a sample of 2 grams.One of you colleges steals half of it, and 3 days later you find that 0.1 grams of the radioactive material is still ...
September 16, 2014

PHI 208 Week 3 Readings Quiz
Which one of these is not a principle that can be drawn from the Categorical Imperative? Act as if the maxim of your action were to become by your will a universal law. Act that you use humanity, whether in your own person or in the person of another, always at the same time ...
September 14, 2014

algebra 2
Let x = hourly wage 40x + 5(1.5x) = 475 40x + 7.5x = 475 47.5x = 475 x = $10/hour
August 24, 2014

Calculus
What is the derivative of 3sin(4x)? I have no idea where to begin!!!
August 24, 2014

algebra
(angle 1) + (angle 2) + (angle 3) = 180 Let's make an angle Q = (angle 1) + (angle 2). SO... Q + (angle 3) = 180 AND (angle 3) = Q - 45. SO... Q + (Q - 45) = 180 2Q = 225 Q = 112.5 Going back to the equation Q + (angle 3) = 180 or by rearranging it: (angle 3) = 180 - Q, if...
August 24, 2014

Algebra
thanks for the help!
August 22, 2014

Algebra
Given that xy = 3/2 and both x and y are nonnegative real numbers, find the minimum value of 10x + 3y/5
August 22, 2014

statistics
a rocket club makes its own rockets. The rockets go to a mean height of 1100 feet with a standard deviation of 60 feet. if the club fires 36 rockets, what is probability that the mean heights of the rockets will be greater than 1080p feet
July 13, 2014

Math - Algebra2
Also, you can tell that the first one is DIVERGENT because the numbers are diverging from one another! In other words, they are getting farther and farther apart The second one is CONVERGENT because all the numbers are converging to a certain number...in this case they are all...
May 16, 2014

Math - Algebra2
state whether the series is convergent or divergent 1) 3 + 12 + 48 + ... 2) 4 + 4/5 + 4/25 + ...
May 16, 2014

accounting II
i am completely stuck on this! 5. Manufacturing statements and cost behavior Tampa Foundry began operations during the current year, manufacturing various products for industrial use. One such product is light-gauge aluminum, which the company sells for $36 per roll. Cost ...
April 30, 2014

accounting II
oh, my apologies
April 28, 2014

accounting II
3. Definitions of manufacturing concepts Interstate Manufacturing produces brass fasteners and incurred the following costs for the year just ended: Materials and supplies used Brass $75,000 Repair parts 16,000 Machine lubricants 9,000 Wages and salaries Machine operators 128,...
April 28, 2014

accounting
i need help working through this! i am stuck. 3. Definitions of manufacturing concepts Interstate Manufacturing produces brass fasteners and incurred the following costs for the year just ended: Materials and supplies used Brass $75,000 Repair parts 16,000 Machine lubricants 9...
April 28, 2014

Chemistry
so then you would take 1.48 M times 42mL, then take that number and divide by .49 M, then convert to mL?
April 20, 2014

Chemistry
How many mL of 0.49 M HCl will neutralize 42 mL of 1.48 M NaOH?
April 20, 2014

Cultural Anthropology
how are traditional anthropological fieldwork techniques used in applied anthropology? How does applied anthropology benefit modern social problems? Thank you!
April 11, 2014

Cultural Anthropology
Contrast the four types of subsistence strategies, be sure to include differences in lifestyle, kinship, property, ownership, distribution of resources and division of labor. Thank you!
April 11, 2014

chemistry help~Please!!!
What are the Ka and/or Kb value for 1M ZnCl2 Show work please!!!
April 11, 2014

engineering
A certain amount of radioisotope (986.8 x 10-9 kg) is used to make the dial of a watch glow in the dark. If the half-life of this isotope is 3.69 x 103 years, how many kilograms of the radioisotope will disappear while the watch is in use for fifty years?
March 30, 2014

Calculus
When dy/dx=(x-6)^½ what does y equal?
March 29, 2014

physics
A plane is found by radar to be flying 5.9 km above the ground. The angle of elevation from the radar to the plane is 78.6°. Ten seconds later, the plane is directly over the station. Find the speed of the plane, assuming that it is flying level.
March 13, 2014

Single vs double replacement reactions
How would you compare a single replacement reaction to a double replacement reaction?in laymans terms?
February 26, 2014

Decomposition reaction
List the number of reactants and the number of products in a decomposition reaction; 2H2O(I)=2H2(g)+O2(g)
February 26, 2014

Synthesis reaction
What are the number of reactants and the number of compounds in; 2H2(g)+O2(g)=2H2O(I)
February 26, 2014

american government
can anyone help? I think it is c.
February 21, 2014

american government
I think it might be c, but it was a tax situation so I am not sure.
February 21, 2014

physics
I need to find the coefficient of the kinetic friction of the following: "a block weighing 300 newtons is moved at a constant speed over a horizontal surface be a force of 50 newtons applied parallel to the surface" would I do the following? k = coefficient of ...
February 18, 2014

Spanish
Is this correct? Complete the paragraph with the correct present-tense form of the most logical verb from the list below. Each verb will be used no more than once, and don’t forget the reflexive pronouns when appropriate. acostarse bañarse deletrear divertirse ...
February 10, 2014

physics
a 65kg person dives into the water from the 10m platform. she comes to a stop 2m below the surface of the water. what net force did the water exert on the swimmer? so for the net force i got -2548N i know: vf^2=vi^2 + 2ad vf^2 = 0 + 2(9.8)(10) vf^2 = 196 vf=14m/s therefore to ...
February 6, 2014

Spanish
Thank you SraJMcGin
January 29, 2014

Spanish
Are these correct? Answer the following questions using the present progressive. Be sure to answer with the same verb that is used in each question. 1. Creo que Xavier (1) _____ (2) __________ en la casa de sus padres mientras asiste a la Universidad. (vivir) Creo que Xavier (...
January 29, 2014

math
i was doing the mean theorem for this problem: (x+4)^2 (x-3) on [-4,3] i got to: 3x^2 + 10x-8=7 someone helped me out and told me the answer was (-5 +/- sqrt(70))/(3) but i don't know how to get to there, can someone please explain to me how to get to this point?
January 29, 2014

calculus
how did you get (-5 +/- sqrt(70))/3
January 28, 2014

calculus
i am on "rolles and the mean value theorem" and was just wondering, when i am doing rolles, do i really need to find the exact value of x where f'(c) = 0? for example: f(x) = (x+4)^2 (x-3) on [-4,3] i get to: 3x^2+10x-8=7 then i dont know if i then need to find ...
January 28, 2014

calculus
typo: 8 should = 8 i meant x should = 8
January 25, 2014

calculus
"superman is in level flight 6 miles above ground. his flight plan takes him directly over whs high school. how fast is he flying when the distance between him and the whs high school is exactly 10 miles and the rate is increasing 40mph?" i keep getting: r = 10 r'...
January 25, 2014

calculus
"superman is in level flight 6 miles above ground. his flight plan takes him directly over whs high school. how fast is he flying when the distance between him and the whs high school is exactly 10 miles and the rate is increasing 40mph?" i keep getting: r = 10 r'...
January 25, 2014

Spanish
Are these correct? Thank you for helping Finish the following sentences including at least one possessive adjective (mi[s], tu[s], su[s], nuestro[s] or nuestra[s]) in your answer. Ejemplo: La profesora que tiene mi amiga es antipática, pero "mis profesores son fant...
January 24, 2014

Spanish
Are these correct? I. Rewrite each sentence by replacing the direct object in quotation marks with a direct object pronoun [me, te, lo, la, nos, los, las]. Ejemplo: No conozco "al jefe del departamento." --> No lo conozco. 1. Esa compañía vende "...
January 23, 2014

Calculus
Water is leaking out of a pool at a rate of 4 cubic inches per second, what is the rate of change of the height of the water at the instant the volume equals 20ft cubic feet
January 22, 2014

calculus
what is the 2nd derivative of: 1-xy = x-y i get (-y-1)/(x-1) for the first the second i know is (-y-1)/(x-1)^2 but i keep getting (0)/(x-1)^2 please show me the steps i should be taking and if possible what i did wrong
January 20, 2014

calculus
a rectangle is 10 inches by 6 inches whose sides are changing. write a formula for both the perimeter and how fast each is changing in terms of L and W how do i do this, an explanation instead of an answer would be most appreciated, thanks in advance.
January 20, 2014

math
idk if this is supposed to be common sense but, i need help understanding why when i make this equation solve for (y) that there is a plus/minus answer. (yx)yx = 2x y = .5(sqrt(2x)/2) y = .5(-sqrt(2x)/2)
January 17, 2014

calculus
i need to use implicit differentiation to find the derivative: yx+y = 8 i keep getting y'=-1-y. i already know the derivative of this, by using explicit by simplification: y(x+1)=8 y=(8)/(x+1) y'= -(8)/(x+1)^2 how do i go about doing this the right way?
January 17, 2014

calculus
i need to find the derivative using chain rule: (x^2 + 2x - 6)^2 (1-x^3)^2 i got the answer from a site but the problem is i cannot get my work to match up with the answer, i dont know what im doing wrong. answer: 10x^9 + 36x^8 − 64x^7 − 182x^6 + 168x^5 + 80x^4 + ...
January 13, 2014

calculus
i need to find the derivative using chain rule and show steps: y= (x) / ((x^2)-1)^(-1/2) and is it possible to have free tutoring online like through a chatroom? i am in need of help
January 10, 2014

calculus
updating previous question so easier to understand im using chain rule to answer this question: f(x) = -5 sqrt(x^2 - 4x + 1) what is f'(x)? tried to use calculator to get the answer to base my answer off of but this is a nonreal number. does this mean i will have to use ...
January 8, 2014

calculus
im using chain rule to answer this question: -5 ((x^2) - 4x + 1)^(1)/(2) tried to use calc to get answer to base off of but this is a nonreal number. does this mean i will have to use imaginary numbers? please help
January 8, 2014

Calculus
Lim x to 3 (-x^2)/((x^2)- 6x + 9) substitution i get -9/0 factoring i get same answer would that mean the answer is infinity? if not how could i prove that it isn't infinity
December 12, 2013

Calc 2
Find the area enclosed by the equations x=16-y^2 and x=y^2-16
December 7, 2013

math
a brick is placed on a balance scale.it balances exactly with a 3/4 pound weight and 3/4 of a brick .what is the weight of the brick? show and explain work
November 11, 2013

accounting
A tabular analysis of the transactions made during August 2010 by Witten Company during its first month of operations is shown below. Each increase and decrease in stockholders' equity is explained. Assets = Liabilities + Stockholders' Equity Cash + Accounts Receivable...
November 9, 2013

Health (Ms. Sue)
what are 3 ways that violence affects the health of people
November 1, 2013

Math
Marlon has 4 cards, lisa has 4 cards and sam has 3 cards. Can you write a multiplication sentence to find how many card they have in all? Explain
October 16, 2013

geometry
ABE and ECD are right triangles. BD is the base straight line and AC is the hypotenuse line intersecting at E.
October 13, 2013

geometry
AC and BD are straight lines, EB=16, DE=24, BC=10. What is the length of AD
October 13, 2013

physics
A hot air balloon is ascending straight up at a constant speed of 6.50 m/s. When the balloon is 13.0 m above the ground, a gun fires a pellet straight up from ground level with an initial speed of 34.0 m/s. Along the paths of the balloon and the pellet, there are two places ...
September 10, 2013

math
you need to prepare 5ml NaCl solution . you already have a stock solution of 10% NaCl that you are asked to use . how many ul NaCl solution would you need to make 5ml of a 2% NaCl solution?
September 2, 2013

physics
(a) How much waste heat is produced by an electrical power station that uses 1.05 multiplied by 1014 J of heat input with an efficiency of 40.0%? (b) What is the ratio of waste heat to work output? (c) How much work is done?
July 24, 2013

physics
The engine of a large ship does 2.05 multiplied by 108 J of work with an efficiency of 4.00%. (a) How much waste heat (J) is produced? (b) How many barrels of fuel are consumed, if each barrel produces 6.00 multiplied by 109 J of heat when burned?
July 24, 2013

physics
A certain heat engine does 8.0 kJ of work and dissipates 8.00 kJ of waste heat in a cyclical process. (a) What was the heat input to this engine? (b) What was its efficiency?
July 24, 2013

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