Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 3,532

**calculus**

I don't know if I'm typing it in wrong into my graphing calculator but I need to estimate the limits of sin(8 theta) / theta

**biochemistry **

If you make up a solution of 100 mL of 0.1 M HEPES in the basic form, what will be the pH? I have no idea where to even start...

**psy/300**

What are the positive aspects of peer groups during adolescence? Which of Erikson's stages describes the psychological issues of adolescence.

**chemistry**

thank you

**chemistry**

thank you

**chemistry**

Freshman in clooege decides to try her hand at pickling olives. According to the recipe, she needs to add 3 tsps. of salt to 1 cup diced olives. She erroneously adds 6 tsps instead. Each tsp weighs about 5g and contains 2300 mg of sodium. Determine the amount of sodium added i...

**calculus**

Thanks Steve, I didn't know how to use this function on the calculator.

**calculus**

calculate y = log_10(x) where x = 0.3

**chemistry**

Thanks, That's it!

**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

**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.

**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?

**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 --&g...

**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.

**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?

**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.

**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

**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.

**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 ...

**Chemistry**

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

**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?

**precalculus**

thank you my precalculus is now done - chemistry is next- can't wait!!

**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

**precalculus**

these are hard to do - thank you

**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

**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 t...

**precalculus**

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

**precalculus**

Thanks Reiny - you have rescued me again

**precalculus**

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

**precalculus**

thanks again

**precalculus**

solve exponential equation. express in exact form. e^x-42e^-x= -19

**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...

**precalculus**

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

**precalculus**

Reiny: Thanks for the websites - they have helped immensely.

**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?

**precalculus**

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

**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.

**precalculus**

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

**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

**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.

**precalculus**

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

**precalculus**

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

**precalculus**

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

**precalculus**

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

**precalculus**

sorry about that squre root (10e^x) +3

**precalculus**

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

**precalculus**

solve the logarithm equation show work. log_7(x-8)- log_7(x-2)=1

**precalculus**

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

**precalculus**

use properties of logarithm to find the exact value of the expression. squareroot log_2/9(2/9)

**pre-calculus**

solve equation show work. log_2(x^2+47)=7

**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

**math**

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

**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

**math**

find the components f and g so that f og=H H(x) = (1/x+1)^15

**math**

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

**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

**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?

**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?

**precalculus**

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

**precalculus**

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

**precalculus**

solve the following equation show all work log4(x-4)= -1.

**precalculus**

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

**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)

**precalculus**

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

**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)

**precalculus**

log5 (x+3)= 1- log5 (X-1) where do I start?

**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.

**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?

**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, howeve...

**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?

**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?

**Biology - Evolution**

Ms. Sue, i already searched on wikipedia but i couldn't able to find any information.

**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

**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

**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

**math**

Thank you : )

**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 w...

**Math-Data Mangment **

6(n+1P2)=3nP2

**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

**Career planning**

When considering a post-secondary option, you should consult which of the following sources?

**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....

**biology**

its B

**chemistry**

How many moles of NH3 are produced from 48.5 g of H2?

**chemistry**

How many grams of N2 are needed to react with 125g of H2?

**chemistry**

How many grams of NH3 can be made from 375g of N2?

**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 Pediatri...

**physics**

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

**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?

**chemistry**

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

**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 ...

**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?

**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 toge...

**6th grade ELA**

nnnnnnnoooooooooooooo

**6th grade ELA**

nnnnnnnoooooooooooooo

**writing**

Mother sewed fur jackets for Father and me

**writing**

how do you do that? that's what I dont get?

**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!

**writing**

its an exploration narrative journal im writing about seeing the grand canyon for the first time

**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!

**Calculus**

Thanks Steve.

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