08/22/15

What is the half life..
What is the half life of a compound if 75% of it decomposes in 60 minutes? Assume first order kinetics. Thanks in advance!!! :-)
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08/22/15

What is the cardinality if A = { {}, {{}, {}}}?
I am still confused about null sets. I'm pretty sure that {} is equivalent to 0 with a / on it. Please help me. I don't want to fail math. :(
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08/20/15

is newton's law true in all refrence
physics question as provided above.i want description as fast as possible.
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08/19/15

fahrenheit, celsius, Kelvin
Denver's average temperature is 86 degrees F. What is the temperature in Celsius? What is the temperature in Kelvin?
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08/19/15

Urgent answer needed
The probability that an MDM4U logs on to Adobe connect is 0.4. If Mr Ouyang picks 2 students at random, create a probability distribution for the number of students logging on to Adobe connect.
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08/19/15

Probability help?
In a random poll of MDM4UE students , it was determined that 90% of students submitted tests before ultimate deadline. In a random sample of 75, what is the probability that exactly 10 submitted... more
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08/15/15

1/6 of the girls and 2/7 of the boys in a school marching band are in the percussion section. the percussion section has 6 girls and 10 boys. how
..many students are in the marching band?
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08/15/15

algebra and trigonometry
if the arithmetic mean of two positive quantities a and b is three times their geometric mean, find the value of a/b in surd form.
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08/13/15

Can anyone guide me more about integration?
Guide me about how to find the area of shaded region in integration
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08/13/15

Find the averages of the function f(x) = x2 + 1 on the interval [1, 10], and for integer values of x. Compare the results.
Calculus Question help I don't understand the concept to answer this question.
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08/13/15

The vector from the point (1,2, -3) to the centre of the sphere x2+y2+z2-kx+3y-lz = 1 is given by < 3, h, -2 > . Then the value of hkl is?
The vector from the point (1,2, -3) to the centre of the sphere x2+y2+z2-kx+3y-lz=1  is given by < 3, h, -2 > . Then the value of hkl is?
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08/11/15

if x³+y³=72, xy=6 and x>y so find the value of x-y
X³+y³=72 ,xy=6 and x>y so find the value of x-y
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08/10/15

extremely hard question
Let vector x = (5, −3) and vector y = (−1, 2). Compute   compvector x(vector y).
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08/10/15

Probability that a person has an IQ of at least 130
If IQ scores are normally distributed with a mean of 100 and a standard deviation of 20, then what is the probability that a person has an IQ score of at least 130? 
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08/09/15

insanely hard question
It turns out that cos(36?) is half of the golden ratio. That is, cos(36?) =(1 + √5)/4. As a result, we know that sin(36?) =(sqrt(10-2sqrt5)/4). Determine cos(9?) and sin(9?) without a calculator
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08/06/15

If a+b is negative, which statement must be true ?
(a)a < 0, b<0 (b) a<0 (c) a<0, b> 0 (d) a<-b i think I understand the question and my answer might be a but I'm not sure how to show my work   
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07/20/15

If you have available 25% and 90% of alc solution how much do you mix to obtain 80 liters of 60% alcohol solution?
Define the variables, set up an appropriate equation to solve the problem .
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07/20/15

normal distribution to approximate a binomial distribution.
normal distribution to approximate a binomial distribution.2,881 adults were selected for a survey. if the probability, p, of a response to the survey is 71.85% what would be the probability that... more
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06/23/15

Markov Chains
Box 1 contains 3 red marbles and Box 2 contains 3 blue marbles. A marble is drawn at random from each box and these two marbles are interchanged (each is put in the other box). Let the states of... more
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06/04/15

with 90% confidence, how many dice rolls should I take so that I get at least one of each faces of the dice?
I want to know how long it would take me to get at least one of each of the dice's face. 
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05/07/15

Calculus (Integration)
∫ln(x) sin-1x dx
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04/19/15

Use linear approximation and differential to approximate : 14^(1/4)
Use linear approximation and differential toto approximate : 14^(1/4)
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03/29/15

Moment of inertia question
The boundary of a thin plate is an ellipse with semiaxes a and b.Let L denote a line in the plane of the plate passing through the center of the ellipse and making an angle k with the axis of... more
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07/15/14

Can anyone please recommend me a good textbook for Linear Algebra?
Can anyone please recommend me a good textbook for Linear Algebra that has lots of practice problems and less theoretical problems? 
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04/25/14

solve. What does w equal
log7(w2)+2log7(5w)=2
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