Monday
March 27, 2017

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Posts by Alex

Total # Posts: 3,679

math
List the real zeros and multiplicity of f(x)=-5(x^2+25)(x-3)^3
March 26, 2017

math
Is the function a polynomial function? Why or why not? If it is a polynomial function identify and label the leading term and constant term. Here are the functions f(x)=(2-x^4)/13 f(x)=x^3+9x-(1/x) it would be great if you could do everything step by step and showing your work.
March 26, 2017

chemistry
I need help. please show step by step? How many milliliters of 1.0 M NaOH would be required to completely neutralize 40.0 mL of 0.60 M HCl?
March 20, 2017

chemistry
so here are the answers for a) NaOH + HCl ? NaCl + H2O (15.3 mL) x (0.7034 M NaOH) x (1 mol HCl / 1 mol NaOH) / (0.831 M HCl) = 12.95 mL HCl b) CaCO3 + 2 HCl ? CaCl2 + CO2 + H2O (30.0 mL HCl total) - (12.95 mL HCl for NaOH) = 17.05 mL HCl for the CaCO3 how would I solve the ...
March 20, 2017

chemistry
A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. After the reaction occurred, it took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) How much HCl (in mL) of was neutralized by NaOH? b) How much HCl (in mL) was ...
March 20, 2017

Chemistry
Thank you guys sooooooo much! You are really helpful!
March 20, 2017

Chemistry
Thanks, and for the #1 how do we get the [oh-] of Naoh to add to the total?
March 20, 2017

Chemistry
When they multiplied concentration of NaOH with the total volume wouldn't that give you moles? That part is confusing to me, I'm unsure what to do next.
March 20, 2017

Chemistry
Please help! I'm trying to find the solubility of Ca(OH)2 in .001305 mol/L aqueous NaOH? Saturated solution of Ca(OH)2 in 0.01305 mol/L NaOH. [HCl] = 0.1213 M Volume of HCl = 9.81 mL Volume of Ca(OH)2/NaOH aliquot = 25ml Find: 1. the TOTAL [OH-] in the saturated solution ...
March 20, 2017

Pre-Algebra
The wind blew away 12 of your muffins. That was 3/7 of all of them. How many are left?
March 15, 2017

computer programming
Create the logic for a program that accepts input values for the projected cost of a vacation and the number of months until vacation. Both values must be greater than zero. Pass both values to a method named displaySavingsAmt(cost, months) that displays the amount you must ...
March 13, 2017

history
is it A or D
March 6, 2017

history
What was the overall goal of the Berlin Blockade? To Make the Allies embrace Communism To make the Allies leave Berlin, so that the USSR could control it all. To show the strength of the USSR To punish East-Berliners for living on the other side of the Berlin Wall
March 6, 2017

chemistry
help please write the phases for the following equation Sr(NO3)2+2KIO3+H2O-----> Sr(IO3)2*H2O+2KNO3 and also write the net ionic equation
March 6, 2017

math
15.34
March 5, 2017

geography
What is the difference in Longitude between town A and town B whose local time are 8:00Am and 3:00Pm respectively?
March 5, 2017

physics
Objects deep beneath the surface of the ocean are subjected to extremely high pressures. Some bacteria in these environments have adapted to pressures as much as a thousand times atmospheric pressure. How might such bacteria be affected if they were rapidly moved to the ...
March 4, 2017

Health
Thank you
March 2, 2017

Health
1- what effect does a baby have on a teenage couple? A- brings the couple closer together B-school and education is unefected C-Mother drops out of school(my answer) D-physical maturity gets stronger
March 2, 2017

Math
Two integers differ by four, with the property that the sum of their reciprocals is the same as 14 times the product of their reciprocals. What are the two integers?
March 1, 2017

Health
Thank you anyway
March 1, 2017

Health
1-HIV positive people receive treatments to keep. A-their viral load as high as possible B-their viral load as low as possible(my answer) C- their viral load as equal to their t-cell count D-their t-cell count as low as possible
March 1, 2017

college chemistry
Calculate how much carbon you use in a year, by considering how much driving you do a year. If I use 500 gal per year, what is my answer? balanced combustion equation which shows how the main component in gasoline reacts in your car and produces carbon dioxide: 2C8H18(l) + ...
February 20, 2017

COLLEGE CHEMISTRY
write the net ionic equation (including phases) that corresponds to zn(no3)2 + Na2CO3--->ZnCO3+2NaNO3.
February 17, 2017

college chemisrt
write the net ionic equation (including phases) that corresponds to zn(no3)2 + Na2CO3--->ZnCO3+2NaNO3
February 17, 2017

Political Science
President Clinton was not convicted by the Senate for perjury (i.e., lying under oath). The Senate found his actions did not constitute a high crime and misdemeanor. If a federal judge acted similarly (i.e., lied on the stand in regard to an extramarital affair), would the ...
February 16, 2017

Political Science
Should the same impeachment process and standards be used for judges, justices, and presidents? Are the same process and standards used?
February 16, 2017

chemistry
How many grams of O2(g) are needed to completely burn 17.3 g of C3H8(g)?
February 14, 2017

chemistry
Complete combustion of 4.20 g of a hydrocarbon produced 13.4 g of CO2 and 4.81 g of H2O. What is the empirical formula for the hydrocarbon?
February 13, 2017

Pre-aljebra
a rectangular dog pen is to be constructed so that one side is against an existing stone wall and the other three sides are to be fenced. of 500 feet of fence is to be used, determine the dimensions and area of the pen with maximum area. I have no idea how to solve this problem.
February 12, 2017

biology
If allele frequencies change, natural selection must be acting in some way. True or False?
February 3, 2017

biology
A devastating tsunami wipes out most of the population of a frog species that lives on just one tropical island. What is the most likely outcome of this event? A) frequency-dependent selection B)inbreeding depression C)rapid adaptive evolution D)purging of all deleterious ...
February 3, 2017

Math
A section of stained glass is made by placing a circle at the top of a triangle with a base of 10 centimeters and a height of 8 centimeters. The diameter of the circle is equal to the height of the triangle. What is the area of the section of stained glass? Show your work. Use...
February 1, 2017

8th grade math
thanks 100%
January 26, 2017

Science
Relate to some objects your nose is in motion when you run. Relate to others it is not motion. Give one example of each
January 23, 2017

Linear Algebra
Hi, well I have the next question: How can I show that the sum of two eigen values is not another eigen value? I know that I can give an example, but is ther another way to solve?, please help...
January 20, 2017

Accounts
I have prepared Income Statement, Statement of Stockholders Equity and Balance Sheet of company and need to know if it is correct or not. imgur. com/HHPU5GO imgur. com/f2VQfNu imgur. com/QqBAarR
January 20, 2017

physics
Place a coin on top of a sheet of paper on a desk or table. Pull the paper horizontally with a quick snap. What concept of physics does this illustrate?
January 17, 2017

Math
A marketing expert determines that sales of television sets an be increased by 3 sets per week for each $20 decrease in price. Weekly sales average 18 sets at $440 each. What price should be given in order to receive $10,800 in revenue?
January 15, 2017

Science
Classify the chemical equation as a combination/synthesis , single replacement, or combustion NaCl(aq) + AgNO3(aq) à AgCl(s) + NaNO3(aq)
January 11, 2017

Geology and soils
An oven tin containing a sample of moist soil was weighed and had a mass of 37.82 g; the empty tin had a mass of 16.15 g. After drying, the tin and soil were weighed again and had a mass of 34.68 g. Assuming GS = 2.70, determine the void ratio of the soil if the air-void ...
January 10, 2017

Physics
84grams
January 8, 2017

History
1.Why did the Portuguese think that they could find an easier way to reach Asia? * a.They had alliances with European nations to send out expeditions. b.They had a large country and a long tradition of Asian exploration. c.They had a large fleet and had defeated Spain in ...
January 4, 2017

History
I Got the others right but i need help with these.----> 1.Why did the Portuguese think that they could find an easier way to reach Asia? * a.They had alliances with European nations to send out expeditions. b.They had a large country and a long tradition of Asian ...
January 4, 2017

help
What brought traders to canada?
January 3, 2017

Maths
Show that: (3x-1)(x+5)(4x-3) = 12x^3 + 47x^2 - 62x +15 for all values of x. (3x-1)(x+5)(4x-3) = (?????)(4x-3) Expand into 6 terms: ???????? Simplify: ???????? Thank you.
January 3, 2017

Math
A pendulum of Length L cm has time period T seconds. T is directly proportional to the square root of L. The length of the pendulum is increased by 40%. What is the percentage increase in the time period? ???????? Multiplier for increasing L = 1.4 Multiplier for increasing T...
January 3, 2017

American government
Aluminium sulphate when dissolved in water forms aluminium hydroxide and sulphuric acid.Since, aluminium hydroxide is insoluble in water, a clear solution is not obtained. Al2(SO4)3 + 6H2O ?2Al(OH)3 + 3H2SO4Aluminium Aluminiumsulphate Hydroxide
January 1, 2017

Math
write the percent as a decimal and a fraction 365% Too confusing
December 29, 2016

Math
In a candy bar, 108 calories are from sugar. There are 240 calories in the candy bar. What percent of the calories are from sugar? I think the answer is 60.
December 29, 2016

Chemistry
What mass of zinc metal would be needed to produce 0.5 litre of hydrogen gas from dilute HCl
December 27, 2016

QUADRILATERAL MATHS
never mind i got it- it's just like matching
December 22, 2016

QUADRILATERAL MATHS
I am not sure how you got 40+4 and 30+35 btw thx for your help
December 22, 2016

QUADRILATERAL MATHS
Equation of the perpendicular bisector of line segment AB: y=5x/3 - 4 Coordinates of point D = (66/7, 82/7) Gradient of BC = 5/3 Coordinates of point C = (8,15) These are the right answers but how to find the area of quadrilateral? Apparently the answer is 629/14 square units
December 22, 2016

QUADRILATERAL MATHS
ABCD is a quadrilateral with angle ABC a right angle. The point D lies on the perpendicular bisector of AB. The coordinates of A and B are (7, 2) and (2, 5) respectively. The equation of line AD is y = 4x ? 26. find the area of quadrilateral ABCD
December 22, 2016

Physics
It seems 38J is incorrect too. Thanks though :)
December 18, 2016

Physics
A 5.0 kg block with a speed of 2.9 m/s collides with a 10 kg block that has a speed of 2.1 m/s in the same direction. After the collision, the 10 kg block is observed to be traveling in the original direction with a speed of 2.6 m/s. Suppose, instead, that the 10 kg block ends...
December 18, 2016

Physics
19.446
December 17, 2016

Sociology
Compare and contrast the similarities and differences of heterogeneity and diversity. Define each term and apply examples.
December 16, 2016

political science
1) Scenario: The President appoints Dan Evans to Senator Adams' seat when Adams resigns due to a personal scandal. This scenario is: a) Constitutional, because it is within the President’s powers to appoint Senators when one dies or resigns in the middle of his/her ...
December 13, 2016

calculus
Take the integral. The initial cost / fixed value (the omni-present +C) is 175. This equation is C(x). You want to know the cost of producing 8 units, so then calculate C(8).
December 10, 2016

chemistry
Industrial waste contains Zn(II) and cyanide. The waste is toxic to aquatic species like fish. 1- If the waste consists of water, Zn(II) and cyanide, what ligands might complex with Zn(II)? 2- Write chemical equilibria reactions the must be considered to determine toxicity of ...
December 10, 2016

Art History, college
Is there a difference between the Flamboyant style and the Late Gothic style of architecture?
December 8, 2016

Art History, college
Q:Describe, with specific examples, what kind of art the Hiberno-Saxons are best known for. Include a basic progression of this art-type’s development ? A: The kind of art that the Hiberno-Saxons are best known for is their illuminated manuscripts as many of the earliest ...
December 7, 2016

Trigonometry
Okay. Love the no help, now he thinks I'm stupid. My friend Nick is quizzing my on stuff I don't know. like this Given: A= 10km S30degreesW and B= 15km S40degreesW Find the resulting vector (magnitude and direction) of the combined vectors Please just help. He's 19...
December 7, 2016

Trignometry
Please Help!!! Given: A= 10km S30degreesW and B= 15km S40degreesW Find the resulting vector (magnitude and direction) of the combined vectors
December 7, 2016

Social Studies Lesson 1 Unit 7
thx xerano
December 7, 2016

Social Studies Pretest Lesson 1 Unit 7
Those answers are wrong. I got a 33 on my test.
December 7, 2016

Art History, college
Q:In which era did icons develop importance? A: I believe icons developed importance in the early 3rd century due to icons being associated with the early Byzantine and Eastern Orthodox Churches.
December 6, 2016

Math
The volume of a sphere is given by the formula: V = (4/3)(pi)R^3 Since we know V = 15000, this equation becomes 15000 = (4/3)(pi)R^3 Solve for R.
December 4, 2016

math
you are dealt 13-card bridge hand from a 52-card bridge deck. what is the probability that you will be dealt exactly 5 hearts? what is the probability that you will dealt at list 2 hearts? what is the probability that you will receive 5 hearts, 4 clubs, 2 diamonds, and 1 spade?
December 4, 2016

math
what divided by 7 equals 15
November 23, 2016

Algebra
A ball is thrown vertically upward from the ground with an initial velocity of 103 ft per sec. Determine what the maximum height will be
November 22, 2016

Physics
Thank you for your help!
November 19, 2016

Physics
Ah, you subtract .23 from .747. Thanks! But what about part b? Do you find when net work = 0?
November 19, 2016

Physics
A 3.20 kg block starts at rest and slides a distance d down a frictionless 30.0° incline, where it runs into a spring (Fig. 8-6). The block slides an additional 23.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant k is 443 N/m. ...
November 19, 2016

Math
In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule: The top 10% receive A's. The next 20% receive B's. The middle ...
November 18, 2016

Math
In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule: The top 10% receive A's. The next 20% receive B's. The middle ...
November 18, 2016

Statistics
Note: For part c, the probability statement should read P(xbar < 3500). The bar denotes sampling means.
November 17, 2016

Statistics
(A) From the problem statement, N(7400, 2900). P(X < 3500) = .0893 (B) ... .0893? (C) This is a test of means. For this we make a new distribution, N(xbar, s), where xbar = mu, s = sigma / sqrt(n). N(7400, 1674.32) P(X < 3500) = .0099
November 17, 2016

Difficult Math
Uh... I'm guessing that .2 means 20%? Because you can't have .2 of a card? But then the total cards you have sums to over 100% and welp.
November 17, 2016

Science
Not enough information. Work is defined as (the sum of) Force(s) dot displacement. So we'd need the direction of the displacement vector. I guess you could argue that "carry" implies perfectly horizontal displacement. In which case, W = 0J. In that case, the ...
November 17, 2016

Algebra
From the problem statement we derive a system of equations. 4a + 3b = 64 a + b = 19 There are a variety of ways to solve this, but I'll use substitution. Isolate a variable. a = 19 - b ... And substitute that into the other equation. 4(19 - b) + 3b = 64 76 - 4b + 3b = 64 -...
November 17, 2016

Statistics
From the problem statement, N(32, 7). (A) 2 years is equivalent to 24 months. We want to know how many watches will break on average. P(X < 24) = .1265 = 12.65% (ouch) (B) This statement asks that we modify the warranty so that less than 16% of watches are refunded. We use ...
November 16, 2016

Physics
Yeah. Set up your static equilibrium equations relative to another pivot. I would recommend doing it at the 100 cm mark, where F is, but it doesn't really matter so long as it's not at the 0 cm mark.
November 16, 2016

Physics
What's N supposed to be? The knife? If so, you would have to pick a different pivot and repeat the process for it.
November 16, 2016

Physics
Start by drawing a picture. You have a meter stick of supposedly uniform mass, so the force due to gravity should be in the geometric center, pointing down. We know on the left end we have an upwards force due to the knife, and at the 40 cm mark a weight. Let's pick the ...
November 16, 2016

English
Inscribed on. Gotta love those English idioms.
November 16, 2016

Physics
As the problem states, this is a conservation of energy problem, so E(initial) = E(final) Let's pick our coordinate system to be point at which the ball initially rests. This makes the initial potential energy 0. When the ball is at its highest point, the velocity is ...
November 16, 2016

6 grade math
So we know that the result of doubling a number and subtracting 27 gives 407. Since your teacher wants a guess and check table, let's just start guessing numbers around the 200 mark, since we know double the number at some point.
November 16, 2016

Statistics
The standard normal curve is N(0, 1). That 6.6& of the curve lies right to the desired z means that .944 of it lies to the left. Use the inverse norm function with the above data in a calculator or look it up in a table. z = +1.589.
November 16, 2016

Algebra
Two fair eight-sided rolled. If a two is showing on one of the die, what is the probability that the sum is six or less?
November 16, 2016

Geometry
You're doing it right. Exact answer just means to keep your answer in symbolic form-- keep your constants. pi * 4^2 * 9 = 144pi (exact) If we wanted the approximate answer, we could substitute pi = 3.14, and then you get 452.
November 13, 2016

Graphing Linear Equations and Inequalities
Pretend that the inequality is an equals sign, so y = 2x. This is a line with slope of +2, and it's x and y intercepts at the origin. Now we want y to be less than 2x. This is represented as the area above / right of the line. To prove this to yourself, you could always ...
November 13, 2016

statistic
I suppose it would depend on how you're defining "overpaying." Certainly, we can assume that the distribution of houses is N(650, 90), and from that, we can conclude that Sam paid an amount one standard deviation above the mean. Whether that is overpaying or not ...
November 13, 2016

physics
Yeah, you have the right process. After you calculate the net force in x and y directions, construct a right triangle by drawing your vectors head-to-tail. |------ | / | / | / | / theta The hypotenuse has a length of ~3188 by Pythagorean theorem. To calculate the angle, we use...
November 13, 2016

Data
We calculate the number of ways each nationality can order their members. This is simple permutations. Canadians: 3! = 6 Americans: 4! = 12 Mexicans: 2! = 2 However, we can also manipulate the order of our diplomats (i.e. Canada, America, Mexico v. Canada, Mexico, America). ...
November 13, 2016

math
By how much does 17 exceed the difference of 5 and -5?
November 12, 2016

Science
In a tennis match the player hits the ball to serve the ball travels 24m from the servers raquet to the opponents Raquet at an average speed of 40 meters per second.calculate the time taken
November 10, 2016

Math
Suppose a tunnel is 44 feet wide and 22 feet high is in the shape of a parabola. A) Determinate an equation, f(x), of a parabola to represent this situation and B) provide a graph to support your work. Suppose lanes pass trought the tunnel that are each 12 feet wide. C) ...
November 9, 2016

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