Monday
February 20, 2017

Posts by SaRa

Total # Posts: 4,433

biology
A bacterium has a genome size of 6.0 X 106 base pairs. There is one Origin of Replication (ORI) and each DNA polymerase catalyzes the addition of 1,000 nucleotides/second. How much time is needed to replicate the entire genome?
February 20, 2017

Molarity question!! please help urgently!
Suppose you wanted to produce an aqueous solution of pH = 8.70 by dissolving one of the following salts in water: NH4Cl, KHSO4, KNO2, NaNO3. Use salt KNO2. But at what molarity? Please help!! Thank you!
February 17, 2017

Equilibrium concentrations, please help!!!
Lead metal is added to 0.150 M Cr3+(aq). Pb(s)+2Cr3+(aq)?Pb2+(aq)+2Cr2+(aq). KC=3.2×10?10 What is [Pb2+] when equilibrium is established in the reaction? What is [Cr2+] when equilibrium is established in the reaction? What is [Cr3+] when equilibrium is established in the...
February 17, 2017

science, chemistry
Lead metal is added to 0.150 M Cr3+(aq). Pb(s)+2Cr3+(aq)?Pb2+(aq)+2Cr2+(aq). KC=3.2×10?10 What is [Pb2+] when equilibrium is established in the reaction? What is [Cr2+] when equilibrium is established in the reaction? What is [Cr3+] when equilibrium is established in the...
February 17, 2017

Math
The total cost of producting x radio sets per day is (1/4x^2 + 35x + 25) dollars. The price per set at which they may be sold is ( 50 -1/2x) dollars. What should be the daily output be to obtain the maximum profit? Help!!!
February 9, 2017

Algerbra
Thank you!
February 8, 2017

Algerbra
Please help! Find the vertex of f(x)=x^2+2x-3 Find the vertex of f(x)=x^2-3x+1
February 8, 2017

English
Thanks Mr.Bob
February 8, 2017

English
Which option best describes a main idea of "Kuba Khan" Society tends to fear creative people Creative people are welcome in society Society tends to love creative people< Hail is a problem in many societies
February 8, 2017

Sara
I'm reading different... maybe it's C
February 8, 2017

English (sorry)
I think it's B.
February 8, 2017

Math
Determine a,b and c so that curve y= ax^3 + bx^2 + cx will have a slope of 4 at its point of inflection (-1,-5) Help please!
February 8, 2017

Math
Determine a,b and c so that curve y= ax^3 + bx^2 + cx will have a slope of 4 at its point of inflection (-1,-5) Help please!
February 8, 2017

Math
Determine a,b and c so that curve y= ax^3 + bx^2 + cx will have a slope of 4 at its point of inflection (-1,-5) Help please!
February 8, 2017

Math
Fine the max or min points and the points of inflection for the function y=3x^4 - 10x^3 - 12x^2 + 12x - 7 Can someone help me!!!
February 7, 2017

Math
Find the critical points, and the points of inflection y= (x+1)^2/x Help me please!!!
February 6, 2017

Algebra
what are the coordinates of the vertex of f(x)=-x^2+6x-9 (0,-9) (3,-9) (3,0) (6,0) How do I figure this out?
February 6, 2017

ELA
A just took the quiz it is 1. A 2. C 3. B 4. D 5. C I hope this helps!
January 31, 2017

Math (Elementary Linear Algebra)
Find the general flow pattern of the network. 20<---A |\B__>x(4) |/ 80<---C I believe the system of equations for A,B,&C is-A: x(1)+x(3)=20 B: x(2)=x(3)+x(4) C: 0=x(1)+x(2) Assuming flows are all nonnegative, what is the largest possible value for x(3). Sorry, this ...
January 31, 2017

Math
I set up the equation like you said 11+.21m =20+.10m -.10m. -.10m 11+ .11m =20 -11. -11 .11m/.11=. 9/.11 This doesn't seem correct
January 18, 2017

Math
Verizon has two different cell phone plans. The cost, Y, of plan A is $11 a month Plus $.21 per minute. The cost, Y, of Plan B is $20 a month plus $.10 per minute. After how much time to the nearest minute will the cost of plan a B equal to the cost of Plan B? Can you help me ...
January 18, 2017

PE
Which is correct?
January 18, 2017

PE
I took the test and Dairy is correct, if you look at my plate it says the same :)
January 18, 2017

math
For what values of r does the function y = erx satisfy the differential equation y'' ? 6y' + 3y = 0?
January 12, 2017

Math discussion
yea thanks Katie you are really a big help! i just did my discussion and pass it! Katie you are the best. Again thank so much!
January 5, 2017

Percentage
A flat-screen TV costs $1,400. The TV is on sale for 35% off. What's the discount price?
January 4, 2017

Presentation
Why is coffee bean good
December 25, 2016

math
thank you for your help
December 21, 2016

math
Justin has an I-tunes gift card worth $125. after he downloads his first app, the cards value is $118.01. after he downloads his second app, the cards value is $111.02. after he downloads his third app, the i-tunes gift card is worth $104.03. Justin wants to download as many ...
December 21, 2016

elementary school
what do I do when there is an equation like 15/4 divided by 9/1 how do I do that since 9 cant go into 15 evenly
December 21, 2016

math
THERE ARE ESTIMATES OF THE MARGIN OF ERROR FOR CONFIDENCE LEVELS OTHER THAN 95%. FOR A 90% CONFIDENCE LEVEL AND A SAMPLE SIZE N, THE MARGIN OF ERROR IS APPROXIMATELY 82/N%.SUPPOSE WE WISH TO HAVE A MARGIN OF ERROR OF 1% WITH A 90% CONFIDENCE LEVEL. APPROXIMATELY HOW MANY ...
December 19, 2016

MATH
What percentage of adult males in America are under 5 feet 7 inches tall?
December 19, 2016

Health
From beans! They are a pure protein. So C would be your correct answer.
December 14, 2016

math
Drawing 5 cards out of 13 cards numbered 1 to 13 without replacement, what is the probability of having a sum greater than 40 ?
December 11, 2016

Physics
consider the circuit in the figure. find the current in the 13 ohm resistor. Answer in units of A
December 7, 2016

english
Can someone help me write a 8 line poem about Romeo and Juliet
December 6, 2016

math
Compare -8 ? 10. Use <, >, or =.
December 5, 2016

Stats
A dean wishes to estimate the average cost of the freshman year at a particular college correct to within $500, with a probability of 0.95. If a random sample of freshmen is to be selected and each asked to keep financial data, how many must be included in the sample? Assume ...
December 5, 2016

Math
Jessica has been given a list of 4 bands and asked to place a vote. Her vote must have the names of her favorite and second favorite bands from the list. How many different votes are possible?
December 4, 2016

Math
Two parallel lines are cut by a transversal Suppose m?438° Find m?6 and m?7 * m?6 and m?7 are corresponding angles *
December 4, 2016

History
What did the Edict of Nantes do for their culture?
December 4, 2016

History
Thank you :)
December 4, 2016

History
What did the Edict of Nantes do for the Economy?
December 4, 2016

Maths
A number consists of two digits.THe digit in tens place is twice that in units place.if 18 is subtracted from the number. The digits are reversed.find the number.
December 4, 2016

Maths
divide 1000 among a,b,c in such a way that a gets 120 more than b and b gets rs 110 more than c .hw much each get
December 4, 2016

Maths
50 divided into two parts such that if 6 is subtracted from one part , 12 is added to the second part we get same number .
December 2, 2016

math
The radioactive decay of a substance is expressed by A=A^0 e^ -kt, where the initial amount A^0, decays to an amount A after t years. The positive constant k differs for each substance. Strontium 90 decays such that k=.028. Find out how much of 1,000 mg of strontium 90 remains...
December 1, 2016

chemistry
why is the spectrum of hydrogen composed of discrete lines?
November 29, 2016

Math
The figure below shows two triangles. Which statement about the triangles is true? i.imgsafe(.)org/c60dcd0488(.)jpg The triangles can be proven congruent by: 1. Angle angle side <<< 2. Angle side angle 3. Side angle side 4. The triangles cannot be proven congruent
November 28, 2016

Algebra
Chandra has 2 liters of a 14% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of a 34% solution?
November 28, 2016

algebra
Shari drove for 90 miles in the city. When she got on the highway, she increased her speed by 20 mph and drove for 130 miles. If Shari drove a total of 4 hours, how fast did she drive in the city?
November 27, 2016

algebra
Bob needs to wash the windows on his house. He has a 25-foot ladder and places the base of the ladder 10 feet from the wall on the house. How far up the wall will the ladder reach?
November 27, 2016

math
Solve the quadratic equation, 2 x2 - 5 x+3
November 27, 2016

Math (please check my answer!!)
What other information is needed to prove that the two triangles congruent by SAS? Picture description: there are two triangles showing line LT = line MQ and L=M A. <T = <Q B. <G = <N C. Line GT = line NQ << D. Line LG = line MN
November 22, 2016

Biology (please help!!)
Explain the process that takes place in the stroma including and reactants going in nd the products produced from these processes in a. bright sunlight and in b. darkness. c. what happens over an extended period of darkness of many days? What I need to know is part C.. I have ...
November 21, 2016

math
Can you please help with finding rate of change in graphing? One question has times: 0 15 23 30 35 distance:30 70 0 45 60 Can you help me get started, I don't know what to do? Also, in another question for the slope I have to find which line has greatest absolute value ? ...
November 20, 2016

Government
What is the role of joint chiefs of staff? A.To serve as objective military advisors B.To manage the executive office of the president << C.To lead the department of Defense << D.To lead the state Department I'm not sure if it's B or C, I do lean more ...
November 18, 2016

math
Estimating the product of a decimal and a whole number what is 8.02 x 70
November 17, 2016

math
What is the estimated answer of 0.97x312
November 17, 2016

Physics
Suppose your car was mired deeply in the mud and you wanted to use the method illustrated in the figure to pull it out. (a) What force in newtons would you have to exert perpendicular to the center of a rope to produce a force of 10,000 N on the car if the angle is 1.80°? ...
November 7, 2016

MATH
If y varies inversely with x and y = 8 when x = 5, then what is y when x = 2? 4 6 10 20
November 5, 2016

Math
A store buys shirts for $12 each and marks up the price by 25%. What is the price for a shirt at this store?
November 1, 2016

Math
V varies inversely with T and V = 12 when T = 6. Which equation shows this relationship? V = 2T V = 72T--- My Answer v=2/T V=72/T
October 27, 2016

Algebra
f(x) varies inversely with x and f(x) = –10 when x = 20. What is the inverse variation equation?
October 27, 2016

math
12.75 x 8.25
October 24, 2016

Math
Which equation(s) represents a proportional relationship? A) y = 5 + x B) y = 4x C) y = 7x² D) y = 2 - x
October 21, 2016

Math
What integer represent a debt of 12$
October 20, 2016

MATH
Suppose an object moves along the x-axis so that its position at time $t$ is $x=-t+\frac{t^3}{6}$. (a) Find the velocity, $v(t)=x(t)$, of the object. (b) What is $v(0)$? What does this say about the direction of motion of the object at time $t=0$? (c) When is the object at the...
October 20, 2016

math
The formula of a trapezoid is A=1/2h(b1+b2) Express b1 in terms of A,h,and b2 I did A=1/2hb1+1/2hb2 A=hb1/2 +hb2/2 A-hb2(2/h)=hb1/2(2/h) A-b2=b1 I am not sure if this is correct? I was confused on how to do this. Any help or explanation is greatly appreciated. Thank you.
October 4, 2016

History
I was wondering how I use citation for a website?
October 4, 2016

English
1. Choose the answer that best matches the word in italics. Samantha tried to look IMPASSIVE when they announced her essay as a finalist in the competition.  (1 point) surprised unemotional*** unsure vibrant 2.   Choose the answer that best matches the word...
September 29, 2016

science
its A
September 29, 2016

Physics
Pls send the answers
September 29, 2016

Civics
I need an example of two Statute laws. I know what it means but I don't know any laws.
September 28, 2016

polynomials
Thank you for explaining my mistake.
September 25, 2016

polynomials
I have to simplify (-x^5y^4)^4(3x^2y)^2(1/3xy) I did (x^20y^16)(9x^4y^2)(1/3xy) (9x^24y^18)(1/3xy) 3x^25y^19 Is this correct? Thank you for your help!
September 25, 2016

algebra
5/x-3/4x=23/x+6 first I made it 20/4x-3/4x=23/x+6 Then I am stuck how to solve the rest of the equation Can you please help. Thank you
September 21, 2016

Math
Carly and Kyle decided to count the number of red, blue, and yellow cars that they saw. They counted twice as many red cars as blue cars. The number of yellow cars they counted was one third of the number of red cars if they counted a tote of 33 cars. How many of each car did ...
September 19, 2016

Social studies
1. Clock maker gun maker and wheat maker 2. B 3. B and c
September 14, 2016

Math
2√2 (3√8 - √6) For my answer I got 24 - 2√12, would this be correct? I'm not sure if I simplified incorrectly.
September 13, 2016

Chemistry
I actually found the answer. The answer is 83 grams. You must convert the values accordingly. oz to grams, Fahrenheit to Celsius. You calculate the heat lost by the drink first. This is the setup: =(368.544g)(4.18J/gC)(-17.7778C) the change in temp is found by first converting...
September 13, 2016

Chemistry
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 13.0 oz drink from 71 ∘F to 39 ∘F, if the heat capacity of the drink is 4.18 J/g∘C? (Assume that the heat transfer is 100 % efficient.)
September 13, 2016

Physics
Ho can I calculate the volume of a CD that is 0.75 mm thick has outer diameter of 128 mm and inner diameter of 15 mm.
September 4, 2016

College Algebra
At a basketball game a vendor sold a combined total of 196 sodas and hotdogs. The number of sodas was 48 more than the number of hotdogs sold
September 1, 2016

chemistry
A solution is made by mixing 25 mL of .35 M LiOH with 15.5 mL of .2225 M NH3. Kb=1.8x10^-5 for NH3 Calculate the pH for the solution.
August 25, 2016

American government
ey it was CDDC
August 23, 2016

perfect number
I need please!!!!
August 16, 2016

perfect number
Yes i need soon for my activity
August 16, 2016

perfect number
I need two perfect numbers. For my activity,I should submit it tomorrow please help me. I need now. Please
August 16, 2016

Maths
An industrial fertilizer costing $370 per tonne to produce is sold retail 61 cents per kilogram.If there is a wastage of 2.5%,find the profit as a percentage of the cost?
June 29, 2016

Abnormal Psychology
GAD
June 27, 2016

Math
Sara was mixing punch for a party from a recipe that calls for 3 parts ginger ale mixed with 2 parts pineapple juice. She graphed the people served compared to the total mixture. Use the point shown on her graph to compute the ginger ale need to serve 20 people.
June 24, 2016

math
if you make guesses for four multiple-choice test questions (each with five possible answers), what is the probability of getting at least one correct?
June 23, 2016

Chemistry
Prepare M/20 oxalic acid solution.Using this solution, find molarity, strength, and percentage purity of the sodium hydroxide solution.
June 13, 2016

English
Option 3 is the Best Answer according to me. Trust me, I am a School Topper in Emirates English Speaking School, Dubai, UAE. Even though others are grammatical enough, most teachers have Option 3 in mind.
June 13, 2016

english
thank you!
May 29, 2016

english
What parts of grammar are the words? Yesterday is history. Tomorrow is a mystery. Today is a gift, which is why we call it the present. Yesterday? Tomorrow? gift? call? it? present? My brother was discharged and will follow up next week. My? will follow up?
May 29, 2016

English
I agree on that one. C.
May 28, 2016

Math
Thanks!!! <3
May 22, 2016

Math
Form the perfect square trinomial in the process of completing the square. What is the value of c? x^2 + 3x + c = 7/4 + c c =
May 22, 2016

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