06/14/16

14 full time employees. In how many ways can the new boss designate 7 as coders, 4 as analysts, and 2 employees as customer service representatives?
don't know where to begin  
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06/14/16

Conditional probability
if a single fair die is rolled find the probability that the number rolled is a 5 Given that it is odd
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06/14/16

Probability- general multiplication rule to find indicated probability
a sample of 4 different calculators is randomly selected from a group containing 48 that are defective and 20 that have no defects. What is the probability that all four of the calculators selected... more
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06/14/16

Word problem
Really need help with this, and by end of day today would be best    The total imports of petroleum ( in millions of barrels per day) in a given year is approximated by the polynomial 40x^3... more
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06/14/16

Counting rules
a tourist in France wants to visit 12 different cities.if the route is randomly selected, what is the probability that she will visit the cities in alphabetical order?
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06/14/16

An unprepared student makes random guesses for the 10 true/false questions on a quiz. Find the probability that there is at least 1 correct answer
no other info
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06/14/16

From a standard deck of 52 cards, what is the probability of picking either an eight or a queen? (There are 4 eights and 4 queens in a standard deck of cards.
From a standard deck of 52 cards, what is the probability of picking either an eight or a queen? (There are 4 eights and 4 queens in a standard deck of cards.  
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06/14/16

In a 2-card hand, what is the probability of holding 2 kings?
no other information 
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06/14/16

a charity group set out on a walk 95 km walk. each day walk two km more than the day before. on the first day walk 15 km .how many days does it take them?
My son 7 years old , he is able to solve this question but he wrote numbers of the day then he add 2 more like first day 15 second 15+2 third 17+2.,, but I want some formula to solve this because... more
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06/14/16

In a right triangle, the hypotenuse is 8 dm longer than one leg and 4 dm longer than the other leg. Find the lengths of the three sides.
 the hypotenuse is 8 dm longer than one leg and 4 dm longer than the other leg. Find the lengths of the three sides.
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06/13/16

what allowed people to have different jobs
is it business class i think thats the answer but i don't no 
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06/13/16

If it has been determined that the probability of an earthquake occurring on a certain day in a certain area is 0.01, what are the odds against an earthquake
no other information 
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06/13/16

Which of the following rules represents the set of ordered pairs?
{(1, 2), (2, 3), (4, 5), (7, 8)}
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06/13/16

a) In how many ways can a Committee of 4 be formed from a group of 5 men and 6 women in such a way that the men are the majority?
from the  four groups formed men should be majority  in each  group   
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06/12/16

pre cal question
Write the equation of a line through the given points in standard form Ax+By=C. (-6,1) and (-1,4)
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06/12/16

Expected Value Insurance Claims
Based on an insurance company's past data, each year an average of 1/90 policy holders make a claim of $250, 1/150 policy holders make a claim of $10,000, and 1/975 make a claim of... more
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06/12/16

write a reasonable scale for the scale diagram
A picture is 42 cm by 36 cm. A scale diagram of the picture must fit in a space that is 3 m by 2 m. write a reasonable scale for the scale diagram.
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06/12/16

math homework
Thirty gallons of a 20% acids solution is needed for an experiment.  Only 40% and 10% acid solutions are available.  How much of each should be mixed to form the needed solution?
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06/12/16

Invest $1 today (PV) at 10% (i) compounded annually for 5 years (n). Find future value FV:
The formula to calculate the value of $1 put into savings today is fv = pv*((1+i)^n). The variables are fv = future value, pv = present value, i = interest rate per period, and n = the number of... more
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06/12/16

Can someone walk me through simplifying sec(?)?^2 * cot(?) * cos(?) =
  I thought it'd be  (1 / cos(θ)2) * (1 / tan(θ)) * (cos(θ) / 1)   Which would get you cos(θ) / cos(θ)2 * tan(θ)   And then coming out to 1 / cos(θ) * tan(θ)   but that doesn't make sense... more
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06/12/16

combination and permutation questions
nC5=252
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06/11/16

Probability distribution question
You play a game of rolling 2 dice. You lose the game if you roll an 11 before you roll a 7. You continue to roll until either an 11 or 7 appear. What is the probability that you will lose the game... more
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06/11/16

Find the acute angle between the diagnols of a rectangle whose sides are 5 cm and 7 cm.
The ans is 71.1 degree. I don't know the method to solve it, So please I request u to try to solve this sum I would really be thankful for it.
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06/11/16

The random variable X has pdf given by f(x)=(1+x),-1<x=0 and f(x)=(1-x),0<x<1
The random variable X has pdf given by  f(x)=(1+x),-1<x≤0 and f(x)=(1-x),0<x<1   a)Find F(x) and sketch its graph?   my solution: F(X)=(x^2/2)+x+1/2 , -1<x≤0 and F(x)=x-(x^2/2)... more
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Sin

06/10/16

(sinx)^2=2-2cosx
Find all solutions of the equation in the interval [0,2pi).   (sinx)^2=2-2cosx   Write your answer in radians in terms of pi
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