11/25/13

A triangular parcel of land has sides of lengths 110 feet, 820 feet and 827 feet.
A triangular parcel of land has sides of lengths 110 feet, 820 feet and 827 feet. 1)What is the area of the parcel of land?  2) If land is valued at 2300 per acre (1 acre is 43,560 feet ), what... more
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11/25/13

central limit theorem
Let X1, , X2 , X3 , …, X20 , be independent samples of a Poisson RV with mean 1. Use thecentral limit theorem to approximateP(∑_(i=1) to 20?Xi≥15)?
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11/24/13

The bearing from city A to city B
The bearing from city A to city B is S 40 degrees E and the bearing from city B to city C is N 25 degrees E. It takes 2.1 hours for a car traveling at 54 miles per hour to go from A to B and 1... more
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11/24/13

Angle of elevation question
Angles of elevation to an airplane are measured from the top and the base of a building that is 20 m tall. The angle from the top of the building is 38°, and the angle from the base of the building... more
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11/24/13

Interest-bearing account
Every month, a particular interest-bearing account earns 0.2 percent interest on the average balance for that month. The function B(t) =7.5t^2 -300t +5000 represents one investor's balance in this... more
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11/24/13

Newton's Law of Cooling
after the coffee is heated to 200 degrees , it is set in a room at 50 degrees.It cools at a rate that is proportional to the difference between its current temperature and that of the surrounding... more
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11/24/13

Find the interest earned on an interest-bearing account
Every month, a particular interest-bearing account earns 0.2 percent interest on the average balance for that month. The function B(t) =7.5t^2 -300t +5000 represents one investor's balance in this... more
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11/23/13

What can be said about P[ 0 < X < 40 ] ?
The response time of a system, X, is a random variable with a mean of 20 seconds and avariance of 20 seconds. What can be said about P[ 0 < X < 40 ] ?
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11/23/13

Determine the probability that the demand.
Demands for bluetooth headsets at a wireless phone center occur at an average of 11 perday and a standard deviation of 5. The center has an inventory of 100 and does notexpect replenishment in the... more
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11/23/13

The expected number of calls
The expected number of calls in progress in a given cell is 75. Give an upper bound onP[ X > 85]
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11/23/13

This is a Statisitcs problem and im unsure to which test i am supposed to run. Please Help?
 Kindergarten children have heights distributed N(39,2) inches. A kindergarten teacher believes that her class of 12 with a sample mean of 40.8 inches is statistically larger than stated value. Run... more
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11/22/13

Find the errors?
Find the absolute, relative and percentage errors when a) 2/3 is approximated to 0.667, b) 1/3 is approximated to 0.333, and c) true value is 0.50 and its calculated value was 0.49.   For part... more
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11/22/13

mathematica induction
  8n-3n  is divisble by 5 
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11/21/13

find w, the angular velocity in radians/min for a spoke on a bike tire revolving 60 times/minute
find w, the angular velocity in radians/min for a spoke on a bike tire revolving 60 times/minute
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11/21/13

2- A radioactive substance decays at a rate proportional to itself. There are 200 grams at the start and 150 grams at the end of 12 hours. A) Find the amount A
2- A radioactive substance decays at a rate proportional to itself. There are 200 grams at the start and 150 grams at the end of 12 hours.A) Find the amount A present at any time t. [Round k to... more
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11/20/13

How can we calculate volume for this question of titration? (Chemistry )
What volume of 0.2535 M NaOH required to titrate 0.8508 g of KHP to stoichiometric end point?
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11/18/13

Urgent! Calculus Help!
Calculate L4 for f(x)=x^2-x+1 and 1<=x<=3. Furthermore, on the given axes, sketch the graph of f(x) and the rectangles corresponding to L4.
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11/17/13

Anyone know what statistical test I should use (in SPSS)?
Anyone know what statistical test I should use (in SPSS)?The experiment was music genre & duration of time levels' effect on mood.2 genres of music / 3 different time levels / 6 different... more
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11/17/13

Find a nonzero matrix?
Find a nonzero matrix A for which A^2=0.   Please help me with steps. Thanks.
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11/17/13

What is its resulting acceleration?
Two 5 kg masses are attached to opposite ends of a long massless cord which passes tautly over a massless frictionless pulley. The upper mass is initially held at rest on a table 50 cm from the... more
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11/16/13

What's the downward acceleration?
Two masses are connected by a light cord which is looped over a light frictionless pulley. If one mass is 3.0 kg and the second mass is 5.0 kg, what's the downward acceleration of the heavier mass?... more
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11/16/13

What's the tension?
Two masses 5.0 and 7.0 kg are originally at rest on a frictionless surface. The masses are connected by a light cord. A second cord is attached to the 7.0 kg mass and pulled with a horizontal force... more
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11/16/13

Find the probability model of your net gain.
A Nevada roulette wheel had 38 pockets, labeled as 0 00 1 2 3 ... 35 36. One bet is single number. If you bet $1 on a number (any one between 1 and 36) and the number comes up, you get the dollar... more
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11/14/13

monopolistic firm involving income effect and substitution effect
Given the demand function of a monopolist operating two plants is equal to Q=400-4p and cost functions for plant A is equal to C=20Q and plant B is equal to C=0.5Q² Assuming the monopolist can... more
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11/13/13

calculate radiative heat
Caclculate the radiative heat gain in watts by a loaf of bread at surface temperature of 100C. The syrrounding oven surface temperature is 1000C. The total surface area of the bread is 0.15m^2 and... more
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