Jim S.

03/25/14

probability Question

The random variable X denotes the time taken for a computer link to be made between the terminal in an executive's office and the computer at a remote factory site. It is known that X has a normal... more

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Probability & Statistics

03/25/14

Probability

The amount of milk sold each day by a grocery store varies according to the normal distribution with mean 130 gallons and standrd deviation 12 gallons. On a randomly selected day, the probability... more

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Probability & Statistics

03/25/14

Probability Question

Many random number generators allow users to specify the range of the random numbers to be produced. Suppose that you specify that the rndom number Y can take any value between 0 and 2. Then the... more

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Factoring

03/24/14

Solve for x

Please help me solve the following: x3+2x2-9x-18=0

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Math Help

03/23/14

Find the area bounded by?

Find the area bounded by y=e^x, y=2, and the y-axis. Answer: 2 ln(2)-1 Please show all your work.

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Precalculus Exponential And Logarithmic Models

03/23/14

The population p of a city is given by p=250,420e^0.12t

1) the population p of a city is given by p=250,420e^0.012t Where t=0 represents 1990 when will the population reach 300,000? 2) The number if bacteria N in a culcure is given by... more

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Linear And Quadratic

03/23/14

simultaneous equation one linear and one quadratic

2x-3y-10=0 and x^2+xy+y^2+2x+y-6=0 please explain in detail because it is really killing me,thanks

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Statistics Question

03/23/14

A testing bureau reports that the mean for the population of Graduate Record Exam (GRE) scores is 500 with a standard deviation of 90.

the scores are normally distributed, what proportion of scores fall between 300 and 400?

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Math Help

03/23/14

Find the total area bounded?

Find the total area bounded by the cubic x=y^3-y and the line x=3y. Answer: 8 Please show all your work.

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Astronomy

03/22/14

An astronaut standing on earth can easily lift a wrench having a mass of 1kg , but not a scientific instrument mass of 100 kg.

in the international space station she is quite capable of manipulating both , although the scientific instrument responds much more slowly than the wrench . explain why

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Math Help

03/22/14

Please answer this calculus question?

At time t, a particle moving in the xy-plane is at position (x(t), y(t)), where x(t) and y(t) are not explicitly given. For t≥0, dx/dt=4t+1 and dy/dt=sin(t^2). At time t=0, x(0)=0 and... more

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Math Help

03/22/14

How to find out how slopes are perpendicular, parallel, or neither. Please help me I missed the whole lecture retaking a quiz!

math slopes linear equations perpendicular parrellel

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Math Help

03/22/14

Can you answer this calculus question?

Let f(x)=sin(x^2)+cos x. cos (x)=1-(x^2)/2!+(x^4)/4!-(x^6)/6!+... sin(x^2)=x^2-(x^6)/3!+(x^10)/5!-(x^14)/7!+... Use the series for cos (x) and the series for sin(x^2) to write the... more

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Algebra

03/22/14

Rita is 12 years old and her father is 39 years old. In how many years will Rita be twice as young as her father?

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Other

03/21/14

If a new car is valued at $21000 and 10 years later it is valued at $3000, then what is the average rate of change of its value during those 10 years?

I can't seem to get the answer. Will You please help me answer this question. I am studying for a test.

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Sdhtj

03/21/14

simplify (2ab³)4

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Math Help

03/20/14

Find the integral?

Find the integral of 4/(x^2+4) dx.

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Algrebra

03/20/14

what is the slope of the line y = 5

what is the slope of the line y=5

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Math

03/19/14

Find the upper and lower z-values that would give you the middle 90% of the area under the curve.

Find the upper and lower z-values that would give you the middle 90% of the area under the curve. (Hint: the two values are the same but one is positive and one is negative)

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Math

03/19/14