Wednesday
September 3, 2014

Posts by SARA


Total # Posts: 3,619

calculus
calculate y = log_10(x) where x = 0.3
January 23, 2012

chemistry
Thanks, That's it!
January 23, 2012

chemistry
that is very true. What I was asking involves something like this as an example: 30mg/kg*1000g / 1kg* 1g /1000mg 30-/kg* 1000-/1-* 1g/1000- 30 * 1000/1000 * 1g = 30g
January 23, 2012

chemistry
Tell me what you think: I wrote #kg = 297mg / 3.5 mg/kg the mg's would eliminate each other and you are left with 297 / 3.5 kg = 85 kg.
January 23, 2012

chemistry
The physician has prescribed a medication of 3.5 mg/kg of body weight. If you give 297 mg of medication what is body weight of patient in kg? Is there a converstion formula?
January 23, 2012

Chemistry
I'm sorry, let me re ask this question and tell you what I've come up with ( I work 11pm-7am and do not sleep in daylight hours) Given 30mg/kg and need grams per dose with dosage every twelve hours. Here's what I've attempted: need to change mg/kg to grams --&...
January 20, 2012

Chemistry
The question just gives me the dosage of 30 m/kg for every twelve hours and asks what the dosage would be in grams.
January 20, 2012

Chemistry
I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?
January 20, 2012

algebra
amanda weighs 3/4 as much as er ister. if amanda weighs 129 how musch does her sister weigh? how do you write the equation with x being the sisters weight.
January 19, 2012

Math
The vertices of an isosceles triangle are A(3, 6), B(7, 2), and C(4, 3). What is the equation of the triangle's line of symmetry? y= x+1 y= x-1 y= x y = -x+1
January 18, 2012

math
a rectangular swimming pool is 15 yds x 25 yds. the bottom of the pool needs to be repainted. if it costs $4.25 per square foot to paint the pool, give the cost to repaint the bottom of the pool.
January 17, 2012

Statistics-Confidence Interval
Can someone please help me on how to work this out?? I'm so super confused. Thanks! A professor at Kaplan University claims that the average age of all Kaplan students is 36 years old. Use a 95% confidence interval to test the professor's claim. Is the professor's ...
January 16, 2012

Chemistry
What is the net ionic equation for this reaction? 2MnO4 (aq) + 5H2C2O4 (aq) + 6H(aq)----->10CO2 (g) + 2Mn(aq) + 8H2O(l)
January 16, 2012

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
January 15, 2012

precalculus
thank you my precalculus is now done - chemistry is next- can't wait!!
January 15, 2012

precalculus
given functions f,g, and h find f o g o h state exact domain. show work f(x)=1/x g(x)=lnx h(x)=2x+15
January 15, 2012

precalculus
these are hard to do - thank you
January 15, 2012

precalculus
verify the functions are inverses of each other by showing that f(g(x)) =x show work. f(x)=6/1-x g(x)= 1- 6/x
January 15, 2012

precalculus
I'm going to do this on my own, but I would like to check mine against yours - give me today to work on it and I will be able to compare. List all possible rational zeros for the polynomial find all real zeros and factor completely. show work f(x)=3x^4-29x^3+89x^2-75x-36 ...
January 15, 2012

precalculus
x/4x+1 < 5x/6 solve the inequality answer in interval notation and show work - thanks
January 15, 2012

precalculus
Thanks Reiny - you have rescued me again
January 15, 2012

precalculus
solve logarithmic equation in exact form only. show work. log_5(x-3)+ log_5(x-6)-log_5(x+1)=2
January 15, 2012

precalculus
thanks again
January 15, 2012

precalculus
solve exponential equation. express in exact form. e^x-42e^-x= -19
January 15, 2012

precalculus
solve the inequality please x^4-6561>0 So far I have come up with x^4>9^4. I guess what's throwing me is the answer has to be in interval notation and for the life of me, I can't remember what that is! (for me, it used to be a blond moment - now I'm gray with...
January 14, 2012

precalculus
find the inverse of function f(x)=4-2ln(x+1). state domain, range and any asymptotes of both
January 14, 2012

precalculus
Reiny: Thanks for the websites - they have helped immensely.
January 14, 2012

precalculus
given the following rational function f(x)= x^2+5x-7 / x-4 state domain, find vertical, horizontal and oblique asymptotes if any. I found the domain to be (-inf.,4)U(4, inf.) and vertical asymptote at x=4 am I right? can someone help me with the rest?
January 14, 2012

precalculus
Thanks, Steve - I cn never get my graphs right - I get all the work, but to draw?! forget it.
January 13, 2012

precalculus
sorry-operating on no sleep for at least 24 hours! f(x)=(x+3)(x-1)^2 analyze x and y intercepts; end behavior and maximum number of turning points.
January 13, 2012

precalculus
analyze the graph of f(x)=(x+3)x-1)^2 x and y itercepts; end behavior; and maximum number of turning points
January 13, 2012

precalculus
have to graph the following piecewise function stating values for f(0) and f(-2) {-x-2 if x<=-1 f(x)={3 if -1<x<=1 {2x+5 if x>=2
January 13, 2012

precalculus
drwls, I should have told you that I do the work myself and with your answers, I confirm what I've done or prove I know nothing--Thanks for your time.
January 13, 2012

precalculus
another one where I need points to graph please. f(x)=(7/5)^(3-x).
January 13, 2012

precalculus
I have the problem 2e^x = squareroot(10e^x) +3. the solution must be in exact form only.
January 13, 2012

precalculus
I'm sorry, started a new job and have put in a lot of hours for training - must have forgotten that you replied.
January 13, 2012

precalculus
how would I find points to plot a graph for the function f(x)=ln(4-x)?
January 13, 2012

precalculus
sorry about that squre root (10e^x) +3
January 11, 2012

precalculus
solve the exponential equation express in exact form only show all work. 2e^x= squareroot 10e^x +3
January 11, 2012

precalculus
solve the logarithm equation show work. log_7(x-8)- log_7(x-2)=1
January 11, 2012

precalculus
write the expression below as a single logarithm show work. ln(x-7/x^2+12x+36)-ln(x^2-49/x+6)
January 11, 2012

precalculus
use properties of logarithm to find the exact value of the expression. squareroot log_2/9(2/9)
January 11, 2012

pre-calculus
solve equation show work. log_2(x^2+47)=7
January 11, 2012

calculus
graph this function and determine the domain,range and vertical asymptote. f(x)=In(4-x) no need to graph just assist with points
January 11, 2012

math
graph the function below. Determine the domain, range, and horizontal asymptote. show work f(x)=(7/5)^(x-3)
January 11, 2012

math
verify that the function f and g are inverse of each other by showing f(g(x)) and g(f(x)) =x f(x)= 6-2/5x g(x)=15-5/2x
January 11, 2012

math
find the components f and g so that f og=H H(x) = (1/x+1)^15
January 11, 2012

math
Reiny, that is correct, but I cannot type the squareroot sign with my computer - how do I find the domain, of this function?
January 11, 2012

math
for the given functions f and g find f o g and state the domain show all work f(x)=sqrt x-3 g(x)=x^2-7x+9
January 11, 2012

Math
Suppose you have 100ft of fence to make a play area for your dog. Does a square or circle provide more area? What other factors might you take into consideration in designing your play area?
January 10, 2012

Math
A rectangular room measures 15ft by 21ft. How much will it cost to carpet this room if carpeting costs $17.95 per square yard?
January 10, 2012

precalculus
solve the following exponential equation. show all work. 4^(4x+2)= 1/64
January 9, 2012

precalculus
write the expression as a sum or difference of logarithms. express powers as factors show all work log4 sqrt pq/7
January 9, 2012

precalculus
solve the following equation show all work log4(x-4)= -1.
January 9, 2012

precalculus
given the function y=2-log(x) find domain, determine vertical asymptote and show work.
January 9, 2012

precalculus
the following function is one-to-one find its inverse. find domain and range of f and f^-1 show work f(x)=^3sqrt(x-3)
January 9, 2012

precalculus
use transformation to graph the following function - state domain, range and horizontal asymptote f(x)= e^5x.
January 9, 2012

precalculus
find the exact value of the following logarithm. Use the properties of logarithms show all work. log2 34-log2 17 (Those are little two's)
January 9, 2012

precalculus
log5 (x+3)= 1- log5 (X-1) where do I start?
January 9, 2012

algebra
your problem with the oil slick is very helpful but all I need is A of the oil slick as a function of the time t. the radius in feet of the spread after t hours is r(t)= 200sqrt t.
January 9, 2012

History
The Federal government has a lot of programs in place to hire the Natives and this is often run by the Bureau, however, if this is in place, why aren't these Indians getting the benefits. Who is swindling the money?
January 2, 2012

Cultural diversity
Sorry I have auto correct on my phone and I thought I changed it back but it was supposed to say.. swindling not swinging. Here is what is was supposed to say- The Federal government has a lot of programs in place to hire the Natives and this is often run by the Bureau, ...
January 2, 2012

Cultural diversity
The federal government has a lot of programs in place to hire the Natives and this is often run by the Bureau,however, if this is in place, why army the Indians getting the benefits? Who is swinging the money?
January 2, 2012

statistics
marbles come in 10 different varieties and there are 15 marbles in a pack.how many packs must a person buy in order to be sure of having at least 10 of one kind?
January 1, 2012

Biology - Evolution
Ms. Sue, i already searched on wikipedia but i couldn't able to find any information.
December 28, 2011

Biology - Evolution
In one sentence each, describe a) one positive effect of direct artificial selection b) one negative effect of direct artificial selection c) one negative effect of indirect artificial selection
December 28, 2011

Calculus
Calculate the height of a cylinder of maximum volume that can be cut from a cone of height 20 cm and base radius 80 cm , please help me
December 25, 2011

College Algebra
what is the domain of each of the following functions,their intercepts and thier range? f(x)=x+3 and f(x)=-2x-3 if x<-2 and x>=-2
December 20, 2011

math
Thank you : )
December 18, 2011

math
Michel wants to buy his mother handmade chocolates for Mothers Day. He has $15.oo to spend. The price of each chocolate is given below. Fudge $0.60 NutClusters $0.75 Truffles $0.80 a)create and solve an equation for each type of chocolate to determine how many Michel can buy ...
December 18, 2011

Math-Data Mangment
6(n+1P2)=3nP2
December 11, 2011

math/ algebra
how can i find the numbers Quadratic equation the sum of 2 whole numbers is 23. their product is 120. find the numbers
December 7, 2011

Career planning
When considering a post-secondary option, you should consult which of the following sources?
December 6, 2011

statistics
A life insurance salesman sells on the average 3 life insurance policies per week. What type of this distribution is? (2 marks) Let in a given week, calculate probability of the salesman will sell, i. at least one policy. (2 marks) ii. from two to four policies. (3 marks) iii...
December 6, 2011

biology
its B
December 5, 2011

chemistry
How many moles of NH3 are produced from 48.5 g of H2?
December 5, 2011

chemistry
How many grams of N2 are needed to react with 125g of H2?
December 5, 2011

chemistry
How many grams of NH3 can be made from 375g of N2?
December 5, 2011

statistics
A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 50 were injured severely. Among children using seat belts, 16 were injured severely (based on data from “Morbidity Among ...
December 3, 2011

physics
A stone tumbles into a mineshaft and strikes bottom after falling for 4.2 seconds. How deep is the mineshaft?
November 29, 2011

physics
A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person’s hand at –5 meters/sec, what was its velocity on impact?
November 29, 2011

chemistry
what must be done with the radioactive waste materials that result from splitting atoms and how is this a problem?
November 14, 2011

Astronomy
The distance between the Earth and Mars when the two panets are at opposition varies greatly because of the large eccentricity of Mar's orbit. The perihelion distance of a planet is given by rmin=a(1-e)and the aphelion distance by rmax=a(1+e) where a is the semimajor axis ...
November 14, 2011

biology
another way to afect the enzyme is lowering the pH of the solution. However, lactase is supposed to be able to work in the stomack. Would lowering the pH of the enzyme solution affect the enzyme? Why or why not?
November 11, 2011

Western Civ
Help! Describe the evolutionary account of the emergence of Israelite religion paying particular attention to the ideas of covenant, law, prophets, morality, relations with Canaanite culture, and other themes you deem significant. Also explain how Jewish scripture was put ...
November 9, 2011

6th grade ELA
nnnnnnnoooooooooooooo
November 8, 2011

writing
Mother sewed fur jackets for Father and me
November 8, 2011

writing
how do you do that? that's what I dont get?
November 8, 2011

writing
is this a correct way to write this sentence Mother sewn fur jackets for Father and I, just in case the weather gets bad. thank you!
November 8, 2011

writing
its an exploration narrative journal im writing about seeing the grand canyon for the first time
November 8, 2011

writing
is there another way to rephrase this sentence in a good way. --- All I ever heard about this Grand Canyon thing was that it is piled up with humongous rocks and composed of fossils. thank you!
November 8, 2011

Calculus
Thanks Steve.
November 7, 2011

Calculus
Please help me with the following 2 questions. 1. Find the area of the curved surface of a right-circular cone of radius 6 and height 4 by rotating the straight line segment from (0,0) to (6,4) about the y-axis. 2. Use the Maclaurin polynomial of degree 4 to approximate sin(0....
November 7, 2011

math- precalculus
Help please! I can't seem to get x as the answer to prove that they are inverses of each other! Show what f and g are inverse functions algebraically f(x)= x-1/x+5 g(x)= -5x+1/x-1
November 4, 2011

Algebra 1
What is the answer to 10-3x is less than or equal to 7x? I tried the problem, but I keep getting x is less than or equal to 1. Is that right?
November 3, 2011

Math
8,9,11,14 , , ,
November 2, 2011

Statistics
Suppose that a sample of 50 scores has a mean of Y=90 and the standard deviation is 15. Between what two values of Y will at least 90% of the scores fall? What is the maximun number of scores that can lie out of the interval?
October 30, 2011

chem
Complete the table below: Note: Make simplifying assumptions, do not use the quadratic formula. What is the pH of the solution created by combining 11.80 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? Complete the table ...
October 28, 2011

chemistry
Complete the table below: Note: Make simplifying assumptions, do not use the quadratic formula. What is the pH of the solution created by combining 2.00 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? Complete the table ...
October 28, 2011

Math algebra
how do you do this by using the FOIL method? 1. 3x^2 + 22x + 7= 2. 2x^2 + 5x - 12= 3. x^2 - 11x + 28= thank you!
October 26, 2011

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members