07/27/15

Population mean
The computed test statistic (rounded to two decimal places) for a claim about a population mean given "x - bar" = 143, "mu" = 150, "lowercase sigma" = 5.6, and n = 10, assuming a normal population.
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07/25/15

A fluid mechanics question, please help.
A vertical rectangular gate, 3m wide and 2m high is hinged at H. On the left side of the gate, sea water lies up to a height 1.2m above the top of the gate. Whereas on the right side of the gate,... more
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07/18/15

Solve x^4 + x^2 – 2 = 0. (MULTIPLE CHOICE)
Solve x4 + x2 – 2 = 0.   a. x = ±1 or x = ±ib. x = ±1 or x = i√2c. x = ±1 or x = ±2d. x = ±1 or x = √2   Choose one thanks
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07/16/15

Probability question
6,800 people are asked about their gambling habits.  2,761 of those people surveyed bought lottery ticket within the last year, 1,007 visited a casino in last year, and 3,886 didn't do either of... more
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07/15/15

Physics: amplitude, frequency, period, spring constant, max velocity and total energy
A 27.8 gram mass oscillates on the end of a spring and its motion can be described by: (1.5 )sin (21.4 t ) [here the units are standard, meters and seconds] What are the following for this system:... more
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07/15/15

Find the function that satisfies
dJ/dt=4J with J(0)= 5
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07/11/15

How to solve this Differential Equation?
xy + y' = 160x
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06/28/15

two positive numbers. second is 2 more than 3 times the first. difference of their squares is 60
You have two positive numbers. The second number is two more than three times the first number. The difference of their squares is 60. Find both positive numbers   How do I set up an equation to... more
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06/24/15

Formula Problem
A car purchased for $12,000 (O) depreciates 10% (P) for a year (Y). If the car is sold in 3 years, what is its depreciated value if V=O-POY?   Confused with working this problem. Any help would... more
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06/22/15

Beta Computation on MSExcel Spreadsheet
Hello Finance Experts! I need the formula for calculating the Beta of a public company on MS Excel spreadsheet. Can someone please give me the formula. I used a formula and got Beta value that is... more
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06/21/15

Probabilities
Six radar systems work independently of each other. Each system can detect an approaching airplane with aprobability of 0.93. Find the probability that an approaching airplane will escape all six... more
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06/19/15

Dealing with i - Can someone please check my reasoning? (And explain why I'm wrong if I'm wrong.)
Solve 3 – 4i = x + yi  The answers come out to be (according to the website) 3 = x and –4 = y. Below is my reasoning on how they got this.   For x: If you rearrange the equation to solve for x,... more
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06/19/15

x+y=2 , x+y=0 , solve it
i have 2 question ,  our teacher give us 2 parallel  problem  but i did not solve it please help me   1.  x+y=2 , x+y=0 , solve it ? 2.  x+y=3 , 2x-2y=6, solve it ?
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06/17/15

If y=1/3 and x = -18, find y.,
I need to finish this by tonight and got stuck in this question  
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06/09/15

For a standard normal distribution,if P(z =a)=0.7116,What is the value of P(z =a)
For a standard normal distribution,if P(z ≤a)=0.7116,What is the value of P(z ≥a)
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05/29/15

an algebra word problem
you launch a model rocket from ground level with an initial velocity of 95 feet per second.  After how many seconds will the rocket have and altitude of 114 feet?
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05/25/15

what do you do when the first negative number is less than the second
When you have two negative numbers and you are subtracting them. I am confused with the part when the first negative number is less than the second. What then do  you do?
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05/25/15

how much force is generated from 5000 grams of steel dropping from 5 meters?
I am having problems with this problem
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05/24/15

Have a problem that needs an answer
9x-49=2x solve and check   x=
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05/24/15

I don't really understand what's going on in this problem.
I'm having trouble identifying all of the components of this problem. I don't understand how the initial position can be defined by so many different angles.    An aircraft flies at constant... more
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05/24/15

the mean and standard deviation was 38% if there was a measurement error and the heaviest person went from 40% to 50% fat what would happen to the mean
A. It would increase b. It would decrease c.  It would stay the same d.  Unable to be determined based on information
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05/12/15

PLEASE RESPOND QUIZ TOMORROW: Finding Value of X Using Central Tendencies
Find X for all problems:   1. Mean is 4; 5,1,6,3,4,x   2. Median is 28; 21, 24, x, 30, 30, 32   3. Mean is -0.35; 2.25, -3.75, -1.25, 3.5, x   Thank you so much! Please respond ASAP
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05/09/15

Need help applying substition/addition method to linear equations
I'm having a very difficult time solving these equations. For some odd reason I keep getting a graph answer. For example, when I try to solve 3x + 2y = 14; it keeps telling me the answer is,... more
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04/30/15

NEED ANSWERED ASAP Derivatives of exponential functions
Determine the coordinates of all points at which the tangent to the curve defined by y=x2e-x is horizontal
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04/30/15

The pressure, P in pounds per square inch (PSI) on a diver depends upon their depth below the water surface, d, in feet, following the equation P(d) = 14.696 +
The pressure, P in pounds per square inch (PSI) on a diver depends upon their depth below the water surface, d, in feet, following the equation P(d) = 14.696 + 0.43d. Interpret the components of... more
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