12/03/14

COLLEGE MATH HELP
A local hotel rented 450 rooms two nights ago when they charged $75 for each room. The following night they rented 600 rooms when they lowered the price to $60 per room. Assuming that this rate of... more
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12/02/14

bank failure once every six years, on average, probability of at least one bank failure in the next 30 years
in a certain country there is a bank failure once every six years, on average. What is the probability of at least one bank failure in the next 30
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12/02/14

I need the probability of a standard problem.
the mean of monthly rent is $2650. Assume the standard deviation is $500. A real estate firm samples 100 apartments. What is the probability that the average rent of the sample is more than $2704?
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12/01/14

Word math problem
Use the formula R=log(a/t)+b to find the intensity R on the Richter scale, given that amplitude a is 293 micrometers, time T between waves is 2.3 seconds, and B is 2.5. Round answer to one decimal... more
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12/01/14

Solve the problem
The half-life of silicon-32 is 710 years. If 10 grams is present now, how much will be present in 300 years? Round the answer to three decimal places.          (model exponential growth and... more
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12/01/14

one model of stereo sold for $118. another sold for $92. 32 stereos were sold with receipts totaling 3,230. How many of each type were sold?
need a system of equations
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12/01/14

What is -28.5*-1.07? Please use long multiplication to love it
This question is part of my homework. Every time I multiply them I get the wrong answer.
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11/30/14

Factor completely
2a4-9a2+4 
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11/29/14

Use the compound interest formulas A=P(1+r/n)
Use the compound interest formulas A=P(1+r/n)nt and A=Pert to solve.   Find the accumulated value of an investment of $10,000 at 7.5% compounded semiannually for 8 years.
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11/29/14

if we add multiply or divide 777 /888/999 horizantly vertically of diagnally then the answer will b 999
if we add multiply or divide  777 888 999 horizantly vertically or diagnally and answer will be  999
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11/28/14

A fair six-sided die is rolled and a marble is randomly selected from a bag that contains four blue marbles,three red marbles, two white marbles,and...
three green marbles. Based on he information, what is the probability that an odd number is rolled and a blue marble is selected?
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11/27/14

For periods 2 & 3, explain the trends in boiling and melting points of the elements across each period
For periods 2 & 3, explain the trends in boiling and melting points of the elements across each period
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11/23/14

Mr. Adams is 33 and Mr. Spicer is 27. How many years ago was Mr. Adams twice as old as Mr. Spicer ?
Algebra 1 Word problem   
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11/21/14

algebra help
Negative 12 divided by 2/3 step by step help?
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11/17/14

AP Statistics question that is vexing me
Roseville Hospital emergency room normally admits six cardiac arrest patients in a day. What's the probability they admit more than two patients in an hour? In any thousand-hour period (about... more
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11/17/14

chemistry, It says I have one of them wrong. Need some help please!
Classify each of the following possible reactions according to whether a precipitate will form or... more
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11/16/14

Probability Cards
Two cards are drawn from a standard 52 card deck. Find the probability that a nine is drawn first and a 10 is drawn second if drawing is done with replacement.
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11/16/14

revenue, profit, maximum, maximum profit. Please help.
A charter bus has determined thatt the cost, in dollars, of providing x people a tour is C(x)=180+2.50x. A full tour consists of 78 people. The ticket price per person is $17 plus $0.25 for each... more
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11/13/14

Which isotope of an element is the most abundant if you know the elements average atomic mass
Deternine which isotope of an element is the most abundant if you know the elements average atomic mass  
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11/13/14

1/8 / 5/9 + 1/6. How do I set up this math problem and find the answer? I have tried but cannot seem to come up with the answer.
1/8 / 5/9 + 1/6. How do I set up this math problem and find the answer? I have tried but cannot seem to come up with the answer.
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11/10/14

how many square kilometres of algae farm would be needed?
A particular algae can be grown at a rate of 30 grams per square metre per day, producing 0.016 litres of biodiesel with an energy density of 9.8 kWh per litre. If it was necessary to produce... more
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11/10/14

Calculate the energy cost (kWh/p/d)
Australia produces 20 megatonnes (Mt) of alumina every year, where each tonne requires 3.8 MWh of heat energy to produce. Calculate the energy cost (kWh/p/d) to produce alumina spread across the... more
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11/09/14

Carol starts a new job on a salary of 20000. She is given a annual wage rise of 500 at the end of every year until she reaches her maximum salary of 25000.
Find the total amount she earns (assuming no other rises), a) in the first 10 years and b) over 15 years.
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11/06/14

direct reasoning and indirect reasoning
A standard deck of 52 cards consists of 4 suits. If a student deals 3 cards from a standard deck, determine the probability to the nearest hundredth, that at least one card is a heart.    1. use... more
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10/30/14

problem solving about triangle and rectangle?!
You have 500 feet of fencing which you want to use to enclose a right triangular area. What is the largest area which you can enclose? (In square feet, enter just the number, no... more
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