03/29/15

Word problem (math)
Suppose $2,000 is invested in an account at annual  interest rate of 6.5% compounded continuously. How long (to the nearest tenth of a year) will it take the investment to double in size?
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03/29/15

Compute the following conditional probabilities:
A and B in a sample space S, but assume that Pr[A] = 0.4, Pr[B] = 0.35, and Pr[A∩ B] = 0.1.  Compute the following conditional probabilities: (1) Pr[A | B] = (2) Pr[B | A] =
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03/29/15

College algebra
Nested Form of a Polynomial Expand Q to prove that the polynomials P and Q are the same. P(x)=3x^4-5x^3+x^2-3x+5 Q(x)=(((3x-5)x+1)x-3)x+5 Try to evaluate P(2) and Q(x) in your head, using the... more
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03/29/15

college algebra
Solve the system by using either the substitution method or the elimination-by-addition method, whichever seems more appropriate. (If the system is dependent, enter DEPENDENT. If the system is... more
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03/29/15

Let A = {1, 3, 5, 7} B = {5, 6, 7, 8} C = {5, 8} D = {2, 5, 8} U = {1, 2, 3, 4, 5, 6, 7, 8}. Determine whether the statement is true or false. {5} ? D
Let A = {1, 3, 5, 7}B = {5, 6, 7, 8}C = {5, 8}D = {2, 5, 8}U = {1, 2, 3, 4, 5, 6, 7, 8}.Determine whether the statement is true or false.{5} ⊆ D
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03/29/15

Find the probability of an odd number with a red card.
Two friends are playing a game where on one turn you roll a six-sided die and pick one of three cards (red, blue, purple) to determine where you move. Find the probability of an odd number with a... more
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03/29/15

HELP! Find the length and width of a rectangle whose length is 4 units less than 3 times the width. The perimeter is 22 units more than twice the width.
Both the length and the width are needed to complete the question fully.
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03/29/15

How many did not watch a reality show?
In a survey of 200 college students, 128 watched at least one reality show on television each week, 131 watched at least one video on MTV each week, 114 watched a national news show on CNN each... more
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03/29/15

An experiment consists of tossing 7 fair (not weighted) coins, expect one of the 7 coins has a head on both sides.
An experiment consists of tossing 7 fair (not weighted) coins, expect one of the 7 coins has a head on both sides. Compute the probability of obtaining exactly 2 heads.
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03/29/15

One fifth of the sum of a number and 2 equals one third of the number. What is the number?
One fifth of the sum of a number and 2 equals one third of the number. What is the number? Solve using fractional equations.
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03/29/15

Sample Space
Let A and B be events in sample space S such that P(A)=.6, P(B)=.5 and P(A intersection B)=.3   Find P(A/B) and P(B/A)
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03/29/15

Find the intervals which f is concave down.
f(x)=10–12x+6x2–x3  
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03/29/15

Using the standard form sketch the graph of the function -1/3x^2+2x+12
the standard form in my book is f(x)=A(x-k)^2 +h
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03/29/15

how many hours can the bike be rented for
a rental company charges $15 plus $4 per hour to rent a bicycle. If Margie does not want to spend more than $27 for her rental, write and solve an inequality to find how many hours she can rent the... more
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03/29/15

Given X~N(5,36)
1. The 50th percentile is? 2. The 10th percentile is? 3. The 90th percentile is? 4. The 20th percentile is? 5. The 75th percentile is?   Not sure how to do this. Please help! Thanks!
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03/28/15

please solve my confustion
Vidushi and Sanya distribute Rs100 each in charity. Vidushi distributes money to 5 more people than sanya and sanya gives each Rs 1 more than vidushi . how many people are recipients of the... more
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03/28/15

The distance between LA and HK is 7,260 mi. It takes the plane 15 hrs to travel, and 12 hrs to come back. Find the speed of plane in air.
Can i see this using two equations?
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03/28/15

Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each should be mixed to get 30L of a solution that is 40% acid?
I don't know where to begin to solve.  I need to see the steps.
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03/28/15

A car dealership offers a $1,200 factory rebate and a 13% discount off the price of a new car
A car dealership offers a $1,200 factory rebate and a 13% discount off the price of a new car c.Write a function for the cost of the car after receiving only the factory rebate.r(c)= Write a... more
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03/28/15

Dunlop makes tires that the mileage the tire lasts follows a normal distribution with the mean 65,000 miles and standard deviation of 4600 miles.
What is the probability that the randomly selected tire will last at least 70,000 miles? Suppose Dunlop warrants the tires for 60,000 miles, what proportion of the tires will last 55,000 miles or... more
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03/28/15

probability of occurrence in small sample of population when know occurrence in population
If 2% of an overall population of 5000 has a certain characteristic, what is the probability that 2 or more of a subset of 10 drawn from the population will have this characteristic? Is there a... more
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03/27/15

A store sells cookies for $6 and candies for $4 each. If the customer bought 8 items for $36 how many cookies and candies did he get?
Cookies $6 Candies $4 Total money spent $36 total items bought 8
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03/27/15

What is the probability that the student attends at least one class on Monday?
involving a student's attendance at math and accounting classes on Mondays. Assume that the student attends math class with probability 0.65, skips accounting class with probability 0.4, and... more
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03/26/15

Word problem help
Suppose the functionN = P 1 − e^(−0.4t)is used to model the length of time t (in hours) it takes for N people living in a town with population P to hear a news flash. How many people in a town of... more
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03/26/15

In toy bin are cars and trains.There are a total of 248 vehicles. If there are three times as many trains as cars, how many trains are there?
In the toy bin there are a total of 248 vehicles.  If there are three times as many trains as cars, how many trains are there?   Write an equation with a variable to solve the problem.   I am a... more
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