Friday

July 25, 2014

July 25, 2014

Number of results: 46,534

**Math**

Find the smallest number N such that: The number of divisors of N is A. The number of divisors of A is B. The number of divisors of B is C. The number of divisors of C is 3. Details and assumptions The divisors include 1 and the number itself. For example, the number of ...
*June 4, 2013 by Mathslover*

**PLEASE HELP - DIVISORS PROB**

What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.
*November 15, 2012 by failureinmath*

**math**

Aliquot divisors are all the divisors of a number except the number itself. The product of the Aliquot divisors of a number is somtimes equal to the square of the number. The Aliquot divisors of of 12 are 1 ,2 ,3 ,4 ,6. Their product,1x2x3x4x6=144=12*2 is the smallest number ...
*January 16, 2013 by Jeff*

**maths**

Find the smallest number N such that: The number of divisors of N is A. The number of divisors of A is B. The number of divisors of B is C. The number of divisors of C is 3.
*June 5, 2013 by rohit*

**Math**

How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"
*January 10, 2011 by Sarah*

**math 1 digit divisors word problem**

When dividing a 3-digit number by a 1-didgit number,for what divisors can you get a remainder of 8? Explain. (Taken straight from my worksheet.)
*January 18, 2011 by ithariel whistler age 10*

**math, algebra**

How is 28 a perfect number? Can someone explain this to me. all i understand that all perfect numbers end in 6 and 8. But how and why is 28 a perfect number. dimes are packaged 50 in a roll. quarters come 40 in a roll.susan b anthony dollars come in rolls of 25. how many rolls...
*December 7, 2006 by Jasmine20*

**math**

the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...
*June 26, 2007 by celina*

**math- algebra- help please!**

3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5
*April 6, 2011 by Zach*

**stats**

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...
*February 18, 2011 by gio*

**statistics**

Use the normal dist to approx the desired prob. Find the prob of getting at most 30 fives in 200 tosses of a fair 6 sided die
*October 4, 2013 by Sandra*

**Statistics**

How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..
*March 9, 2014 by Brenda*

**writing or literature**

My teacher writes this prob. on the board but i don't get it!!_self-satisfaction _don't leave her at the alter _sea water _the very edge brick What is that!!!!!!!!!!!!!!!!!!!!!!!! Please please please help me!!!!!!!!!!
*December 13, 2011 by hena(online)*

**math, algebra**

i just want to re make sure that the following question is correct. (1) List all the factors of 16 My answer: 1,2,4,8,16 That is correct. They may not want 1 and 16 to be included, since every integer has 1 and itself as factors. so i should take away the 1 and 16 A factor of...
*December 17, 2006 by jasmine20*

**algebra**

Prob.1: -14=2x+2x-2 Prob.2: 5x=50
*May 29, 2013 by cheyenne*

**quantum**

prob 2 ans please?
*September 13, 2013 by Anonymous*

**ECON! Please help!**

Joe: y= 100 (High) prob = 2/5 =25 (medium) prob= 2/5 =0 (low) prob = 1/5 Calculate: 1. Jos閽s risk premium, p, associated with farming and 2. Jos閽s certainty equivalent associated with farming. The village decides to implement an informal insurance (risk sharing) arrangement...
*June 1, 2010 by anonymous*

**SPELLING PLEASE help**

the prob is: middle : center :: thinner : s _ _ _ _er
*November 27, 2007 by Amber*

**Math**

how to estimate with 1-digit divisors
*October 26, 2007 by Angelica*

**estimate whith 1 digit divisors**

358-3=
*September 25, 2012 by rayvon*

**Statistics**

DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.
*March 2, 2013 by Sue*

**Division with integer answers using divisors 9&50**

266 / 38
*September 25, 2009 by Jake*

**math**

how many prime positive integers are divisors of 555?
*September 16, 2012 by shaun*

**Algebra**

How many integers from 1 to 19999 have exactly 15 divisors?
*March 4, 2013 by John*

**math**

What is the sum of all of the positive divisors of 100?
*April 16, 2013 by ayan*

**Probability and Statistics (Continuation)**

Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth trial? MY answers: a) P...
*September 29, 2013 by Katy*

**Calculus**

I'm having difficulty figuring #2 of this prob;em. I'm utterly clueless. Can someone explain it? Please and thank you. y=x 2. List the roots of the function.
*August 18, 2011 by Elee*

**STATISTICS**

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
*February 10, 2008 by todd*

**statistics**

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...
*February 10, 2008 by todd*

**statistics**

Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is the prob. that more ...
*February 10, 2008 by todd*

**chem**

I am having a hard time with the following : 50 g HCl + 50g Ca(OH)2=H2O+? amt of CaCl2? I dont know how to set this prob. up.Please HELP!Thank you in advance....
*November 12, 2010 by joann*

**Finance**

Assuming that the returns from holding small-company stocks are normally distributed, what is the approximate probability that your money will double in value in a single year? What about triple in value. Many of my classmates have an expected return of 17.6% and a standard ...
*July 15, 2012 by Anonymous*

**11th grade**

hi, i am haveing prob;ems with my math its called solving the quadratic equation but my teacher is not really giving me the attention i need to pass the class but will you help me please
*January 28, 2009 by boartavis*

**statistics**

Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
*April 15, 2010 by UPD*

**Stats**

nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...
*April 15, 2010 by UPD*

**math**

dale placed six cARDS IN A BAG.QONE CARD IS LABELD 1,TWO CARDS ARE LABELD2,AND RTHREE CARDS ARE LABELD 3.FIND THE PROBABILITY OOF PICKING TWO CARDS IN THE ORDER OF THE NUBERS LISTED TH EFIRST CARD IS RETURNED BEFORE THE SECOND IS PICKED ..... P,(1,2) P(3,NOT1) p(NOT2,2) P(1,3...
*May 22, 2007 by sam*

**Math **

Using the terms factors, divisors, multiple, product, and divisible by, write as mant statements as you can about the number sentence 4x7=28.
*August 9, 2010 by Joshua *

**Maths**

For how many odd positive integers n<1000 does the number of positive divisors of n divide n?
*April 22, 2013 by OIan*

**MATHS!!!!**

For how many odd positive integers n<1000 does the number of positive divisors of n divide n?
*April 24, 2013 by ianian*

**maths**

What is the smallest positive integer with exactly 12 (positive) divisors?
*May 16, 2013 by rohit*

**math help please**

Let f:ℤ+ → ℤ+ be the function defined by: for each x ∈ ℤ+, f(x) is the number of positive divisors of x. - find integers m, n, and k so tha f(m)=3, f(n) = 4 anf f(k) = 5 -is f one-to one? Explain, is f unto? prove is it true that all positive odd ...
*March 21, 2014 by excel*

**Dr bob please! Chemistry**

hi, i think this prob has to do what you did the last time but how does pressure play appart in this chapter?? What pressure would have to be applied to steam at 325癈 to condense the steam to liquid water (腍 vap = 40.7 kJ/mol)?
*November 28, 2008 by Rachelle*

**Math PLEASE HELP ASAP**

-PLEASE INCLUDE SOLUTIONS AND EXPLAIN HOW YOU DID IT PLEASE. *CHALLENGE. 1.SIMPLIFY : SQUARE ROOT OF 16^8+8^4/16^2+16^7 2.EXPRESS 1 + 1/1+SQUARE ROOT OF 2 - 1/1-SQUARE ROOT OF 2 IN THE FORM A+B SQUARE ROOT OF 2, WHERE A AND BARE RATIONAL NUMBERS. FIND A + B. 3. ARRANGE THE ...
*December 10, 2012 by Aliza *

**stats again**

ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...
*July 5, 2007 by holly*

**MATH**

Estimate the result in the following division problem. (Remember to round divisors to the nearest ten and dividends to the nearest hundred.) 612 divided by 32 Answer being 19?
*September 5, 2009 by A*

**algebra**

another prob(last one) 6x-7x=18
*June 8, 2010 by Anonymous*

**accounting ..urgent pls**

can you help please.. PROB 1: A, B and C shared the profit of Rs. 9,00,000 in the ratio of 2:2:1 without providing for interest on B抯 loan, B granted a loan of Rs. 4,00,000 in the beginning of accounting year. Where as the partnership deed is silent on the interest on loan ...
*June 1, 2011 by jessie*

**Prob/Stat**

If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?
*April 1, 2012 by Sheila*

**MATH I HAVE ASKED TWICE ALREADY!!!!!!!!! **

When dividing a 3 digit number by a 1 digit number for what divisors can you get a remainder 8?
*January 6, 2013 by Anonymous*

**math**

My name is Two Twenty. I am in search of my friend. Find the sum of my proper divisors to bring my journey to an end. What is my friend's name?
*April 21, 2008 by Jas*

**problem solving**

My name is Two Twenty. I am in search of my friend. Find the sum of my proper divisors to bring my journey to an end. What is my friend's name?
*April 21, 2008 by Ashley*

**math prob**

how many midsegments does a triangle have?
*May 8, 2009 by gabe*

**math**

so the prob of drawn an ace or spade is 4/52
*October 27, 2009 by rency*

**Math Prob**

ok for changing the base of a log from 10 to e is there a formula?
*December 11, 2008 by confused*

**math**

is 765/2023 simplified?!!? I think it is. Nope, it isn't, 765 = 32*5*17 check the divisor of 765 into 2023 what do you mean What do you mean?Your making it more difficult for her! What am I making difficult here? All we need to do is find the factorization of one of the ...
*October 19, 2006 by Sydney*

**MATH Prob.**

How many different ways can a teacher line up 5 students for lunch?
*August 20, 2009 by Twg*

**stats & prob.**

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.
*November 27, 2012 by Georgia*

**probability!**

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that someone who ...
*October 21, 2010 by Lauren*

**Algebra help please**

Simplify I am using parenthesis to separate , if i write the whole prob as is, it runs together a + 9 (3a - 18) _____ ________ 36 - a^2 (3a + 27) possible answers i can choose from 1 ____ a + 6 1 ____ a - 6 - 1 ____ a - 6 - 1 ___ a + 6 I am thinking it is - 1 ___ a + 6 but I ...
*May 6, 2007 by Kitty*

**prob.**

If it is given that P(A)=1/3 and P(B/A)=2/3 (the dividing sign is ment to be a vertical bar), what is P(A and B). I got .07. Is this correct? If it isn't, why not?
*December 18, 2008 by Juliette*

**MATH Prob.**

How many three-symbol codes can be formed from the letters I, S, P, and Y without repetition?
*August 6, 2009 by Twg*

**MATH Prob.**

Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??
*August 19, 2009 by Twg*

**MATH Prob.**

What is the expected value of one 700 tickets in a raffle for a prize of $1400?
*August 20, 2009 by Twg*

**vector prob, please help explain.**

can someone help me please or explain this better? i'm having trouble. thank you, chelsea Three ropes hold a zeppelin in place, but two of the ropes break. The remaining rope holds the zeppelin with a tension of 255 N at an angle of 40 degrees with the ground due to a wind. ...
*December 16, 2012 by chelseavanderguard*

**MATH Prob.**

how many three letter symbols can be formed from the letters A,C,K,L, & M without repetition? so far I have 12
*August 8, 2009 by Twg*

**Algebra 2: Prob and Stats**

Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625
*May 24, 2010 by Skye*

**Trigonometric prob.**

Hi, my question is attached to the web below (picture), because I can't draw the diagram on here. Sorry for any inconvenience. Please help and thanks. imageshack . us/photo/my-images / 845 / img0043gx . jpg/ Sorry, the web address is spaced out so you need to put it together.....
*April 30, 2012 by Anonymous*

**Prob and stats**

A card is to be chosen at random from a shuffled deck. Find the probability the card drawn is A. The queen of clubs , given that it is an honor card B. a red four, given that the face number is even C. A seven, given that the face number is prime Please help me, thanks :)
*February 19, 2013 by Mac*

**MATH Prob.**

if you have two fair dice that are rolled, what is the probability of a sum 6 given that the roll is a 'double'?
*August 8, 2009 by Twg*

**MATH Prob.**

What are the odds in favor of getting at least one head in three successive flips of a coin?
*August 11, 2009 by Twg*

**MATH Prob.**

There are 6 contestants in a singing competition. How many different ways can first, second, and third place be awarded?
*August 20, 2009 by Twg*

**3rd grade**

one dividend in my fact family is 18 one of my divisors is twice one of myquotients what three numbers are in my fact family
*April 1, 2010 by melissa*

**Sigma over Phi**

Let σ(n) be the sum of the positive divisors of an integer n and ϕ(n) be the number of positive integers smaller than n that are coprime to n. If p is a prime number, what is the maximum value σ(p)/ϕ(p)?
*April 19, 2013 by HELP ME...uRGENT!*

**Prob and Stats**

In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56
*December 9, 2009 by please help!*

**mathematics**

Let σ(n) be the sum of the positive divisors of an integer n and ϕ(n) be the number of positive integers smaller than n that are coprime to n. If p is a prime number, what is the maximum value σ(p)ϕ(p)?
*February 6, 2013 by Anonymous*

**maths**

Let σ(n) be the sum of the positive divisors of an integer n and ϕ(n) be the number of positive integers smaller than n that are coprime to n. If p is a prime number, what is the maximum value σ(p)ϕ(p)?
*February 8, 2013 by Anonymous1*

**math**

am having prob..wv zs numb..given that f(x)=x+6/2x,find f(4) and f inverse(x) am not sure abt the answer the frst 1,i get 1.25 and the second oneeee i dnt knw hw to do it
*September 16, 2008 by pallaa*

**MATH Prob.**

How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?
*August 12, 2009 by Twg*

**math prob.**

the purchasing director of a bank has just received a shipment of 100 printers. She has been told that the shipment includes 5 defective printers. She randomly selects two printers and tests them. If both printers work the purchasing director accepts the shipment. what is the ...
*July 25, 2010 by sha*

**algebra**

A number, greater than or equal to 2, is called product-perfect if it is equal to the product of all of its proper divisors. For example, 6=1, hence 6 is product perfect. How many product-perfect numbers are there below 50?
*March 4, 2013 by Anonymous...urgent!*

**math prob**

Twelve people attend the first meeting of the Star Wars Club. They exchange e-mail addresses. How many exchanges take place?
*October 6, 2013 by Anonymous*

**Plz Help!I Need to find Hypotheses for prob.**

If 3x - 7 = -4, then x = 1. Write the hypotheses of this statement
*December 2, 2006 by Margie...*

**math**

okay i am comepletely stuck on this math prob....: x + 5y - 10 = 0 x = 2y - 8 i know the answer is -20/7 , 18/7 but i have no idea how they got it so someone PLZ HELP!!!!
*February 26, 2008 by shelby*

**MATH Prob.**

What are the odds in favor of drawing a spade and a heart if drawing from a deck of cards w/o replacement?
*August 11, 2009 by Twg*

**Prob and Stats**

If X is a random variable with distribution X~N(350,110) find (a)P(X<400) and b)P(250<X<400)
*October 4, 2011 by Kathryn*

**algebra**

-720=x-9x plese explain to me how to do this prob step by step
*June 8, 2010 by Anonymous*

**MATH Prob.**

A box contains 13 white cards numbered 1 through13. List the sample space of the event choosing one card with a number greater than 6.
*August 8, 2009 by Twg*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.
*August 8, 2009 by Twg*

**MATH Prob.**

There are 8 members on a board of directors. If they must form a subcommittee of 3 members, how many different subcommittees are possible?
*August 20, 2009 by Twg*

**Math**

the only perfect number of the form x(n) + y(n) A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect number, since its positive divisors are 1, 2, and 3 and 1+2+3 = 6. 28, 496, and 8128 are also ...
*November 19, 2006 by Mike*

**MATH Prob.**

When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting the 4 of spades.
*August 20, 2009 by Twg*

**prob**

a music teacher wants to determine the music performances of students.a survey of wich group would produce a random sample
*June 25, 2009 by Anonymous*

**MATH Prob.**

A 6-sided die is rolled. The sides contain the numbers 1,2,3,4,5,6. List the sample space of rolling one die.
*August 8, 2009 by Twg*

**Maths**

in the following rings find all units, Zero divisors and idompotent elements and determine whether the ring is a field. a)Z2 b)Z5 c)Z10 NB z is integers( positive or negatives including zero z is integers( positive or negatives including zero
*November 20, 2012 by JESS*

**math**

Let f:ℤ+ → ℤ+ be the function defined by: for each x ∈ ℤ+, f(x) is the number of positive divisors of x. - find integers m, n, nd k so tha f(m)=3, f(n) = 4 anf f(k) = 5 -is f one-to one? Explain, is f unto? prove is it true that all positive odd ...
*March 20, 2014 by excel*

**MATH Prob.**

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers. A) 4/3 B) 1/81 C)1/64 D)3/4 I automatically think D.
*August 9, 2009 by Twg*

**discrete math**

Let f:ℤ+ → ℤ+ be the function defined by: for each x ∈ ℤ+, f(x) is the number of positive divisors of x. - find integers m, n, nd k so tha f(m)=3, f(n) = 4 anf f(k) = 5 -is f one-to one? Explain, is f unto? prove is it true that all positive odd ...
*March 20, 2014 by excel*

**MATH Prob.**

Determine whether the situation calls for a discrete or continuous random variable. A)the cost of a random selected orange B)the Ph level of shampoo
*August 20, 2009 by Twg*

**Algebra**

Maybe that was to confusing...we have a data sheet to fill out - 2 questions with simple interest and 2 with compound interest. I just need the simple interest help: Prob. #1 Find the total amount if you deposit $500. at a rate of 5% for two years using simple interest. Year 1...
*February 25, 2013 by Cassie*

**MATH Prob.**

Sam bought 1 of 250 tickets selling for $2 in a game with a grand prize of $400. Was $2 a fair price to pay for a ticket to play this game?
*August 11, 2009 by Twg*

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