05/04/15

Write the particular equation representing this data expressing air pressure as a function of altitude.
Climbing Mt. Everest is not an easy task! Not only is it a difficult hike, but the Earth’s atmosphere decreases exponentially as you climb above the Earth’s surface, and this makes it harder to... more
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05/04/15

What is the period of f(x) = cot(4x)+7
I am so confused please help
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05/03/15

Ideal gas, potential energy help
Let us consider an ideal gas in a gravitational field which is uniform with strength g. The gas is trapped in a highly realistic h=10km vertical column of height h with perfectly insulating walls.... more
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04/20/15

calculate delta H for the reaction
When 1.045 g of CaO is added to 50 mL of water at 25 degrees Celsius in a caloriemeter, the temp of the water increases to 32.3 degrees Celsius. Assuming the specific heat of the solution is 4.18... more
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04/20/15

Given the substitution, prove the integral is true
Given that u = Pi - x , prove that the integral from 0 to Pi of x*f(Sin(x)) dx is equal to (Pi/2) * the integral from 0 to Pi of f(Sin(x)) dx   I took the derivative of U and got du = 0-1dx,... more
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04/19/15

Use linear approximation and differential to approximate: sin 31`
Use linear approximation and differential to approximate: sin 31`
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04/15/15

(1) What is the probability that she remembers to bring her briefcase every day in one week (5 days)?
about the professor who sometimes forgets to bring her briefcase to the office, but assume that, each day, the probability that she forgets the briefcase is 1/6. Assume that her forgetting is a... more
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04/14/15

find the limit
lim(xe^(1/x)-x) x->infinity   Please help! show all steps
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04/05/15

Find a positive value of b so that the trinomial is factorable. 3x^2+bx-2 (3x^2 is x to second power)
I dont understand how to get the value of b
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04/04/15

Find all values of j for which the quadratic equation has two real solutions? 4x^2+4x+j=0 Write your answer as an equality or inequality in terms of j
Find all values of j for which the quadratic equation has two real solutions? 4x^2+4x+j=0 Write your answer as an equality or inequality in terms of j
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04/01/15

optimization problem
A manufacturer wishes to produce rectangular containers with square bottoms and tops, where each container has a capacity of 250 cubic inches. If the material used for the top and bottom costs... more
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04/01/15

What is the probability that the subcommittee consists of 2 men and 1 woman, given that it contains both men and women?
For this problem, assume that the committee contains 10 men and 5 women and that three are selected at random for a subcommittee.What is the probability that the subcommittee consists of 2 men and... more
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03/30/15

Find the inverse matrix (if it exists)
[1 -1 1] [0 -1 0] [0 0 2] (the brackets are all suppose to be combined)   Answer: first row=? second row=? third row=?
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03/27/15

what are the real zeros of x^4-5x^3+6^2-x-2
i need help with this problem canyou explain please
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03/25/15

find the rate at which water is being pumped into the tank in cubic centimeters per minute?
Water is leaking out of an inverted conical tank at a rate of 11000 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 14... more
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03/23/15

why hydrogen bonding is less strong as compared to covalent or ionic bonds
reasons why hydrogen bonding is less strong as compare to ionic and covalent bond  
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03/23/15

Decide |z|, arg ??¯,Re z, Im ??¯ for z = 1 - i
Decide |z|, arg ??¯,Re z, Im ??¯    for    z = 1 − i
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03/23/15

calculate the integral (2x - 4x3) dx
Can you help me calculate the integral ∫²1 (2x - 4x3) dx ?And show me the steps to get there? Thanks!
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03/23/15

How many liters of each solution should you use to create 10 liters of 15% solution ?
Kerston is in the lab with Mr. Ahkter and Ms. Cowgill. She needs a 15% acid solution for an experiment. However, she only has access to a 10% solution and a 30% solution. 
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03/23/15

How many points do the graphs of all three equations below have in common?
x=y+8 -x=y-8 6x=2y+4
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03/23/15

solutions question
You need 200 mL of a 75% alcohol solution. On hand, you have a 50% alcohol mixture and a 90% alcohol mixture. How much of each mixture will you need to obtain the desired solution?
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03/22/15

how do you calculate the focus and directrix from an equation hen its given in vertex form
how do you calculate the focus and directrix from an equation hen its given in vertex form
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03/19/15

Equation with focus and vertex
what is the equation for a parabola with a vertex of (-2,3) and focus at (-4,3)
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03/18/15

Factor the polynomial completely
3x3y-13x2y2+4xy3
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03/18/15

In(u)^3=7In(u)
I am so lost
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