10/20/13

Dice probability
You roll a die. If you roll an odd number, you will receive as many dollars as the number rolled. If you roll an even number, you will lose as many dollars as the number rolled. What are your... more
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10/20/13

Card probability
Draw, without replacement, 5 cards from a standard deck. Determine, to 2 decimal places, the expected number of aces drawn.
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10/20/13

How much work is done by a 45 N force acting 35 degrees above the horizontal in pulling a block 9 m across a horizontal surface?
Numerical answer only please
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10/20/13

Productivity
I need the formula for the following: I have 39 technicians working 8 hours a day. The technicians should be loaded with 4.5 jobs per day, but are currently loaded with 2.4 jobs per day. What is... more
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10/18/13

trigonometric function
A point on the terminal side Θ is (2/5, 5/8) determine the exact value of the 6 trigonometric fictional of Θ
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10/17/13

True or False and how do you find the answer.
Suppose that a judges decisions follow a binomial distribution and that his verdict is correct 90% of the time. In his next 10 decisions, the probability that he makes fewer than 2 incorrect... more
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10/17/13

Why is it with function transformations that sometimes horizontal translations are the opposite of what I think they'd be?
Example: In –x^2– 4x+ 5 I would say ok so it has a reflection of the y axis, It moves right 4 units and moves up 5. But the answer is that instead of moving 4 units right, its 4 units LEFT. Why???
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10/17/13

Is the rope in danger of breaking?
A 80 kg container is lifted by a rope. The rope is guaranteed not to break if the tension is up to 800 N. The container started at rest, and after 2 seconds is moving at 3.0 m/s. Is the rope in... more
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10/17/13

Two watches are together at 12 O'clock. If one gains 75 seconds each hour, and the other loses 45 seconds each hour, when will they be together again at 12?
 Two watches are together at 12 o'clock.  If one gains 75 seconds each hour , and the other loses 45 seconds each hour, when will they be together again at 12?
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10/17/13

68% of cars on a toll-road have EZ-pass. 5 cars are approaching the toll-gates. What is the probability that:
a. None have E-Z pass? b. All have E-Z pass? c. All but 2 have E-Z pass? d. At least 2 have E-Z pass?
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10/17/13

Past experience has shown that 6% of the students in Math 101 will receive an A. What is the probability that in a class of 25 students:
a. Exactly 6 will receive As? b. At most 2 will receive As? c. At most 2 will receive As or Bs, given that 9.5% of the students in Math 101 receive Bs? XX
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10/16/13

A box weighing 150 N is at rest on a horizontal floor. The coefficient of static friction is 0.4.
What is the smallest force F exerted eastward and upward at an angle of 350 with the horizontal that can start the box in motion?
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10/16/13

A crate on a ramp will slip if the inclination is 55 degrees.
a.) What is the coefficient of static friction?b.) The block has a mass of 5 kg. What is the force of friction on it before it begins to slip?
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10/16/13

7 horses are running in a race. You randomly place a bet on 2 of the horses. What is the probability that:
a. One of your horses comes in first? b. Your two horses come in first and second? c. Both of your horses finish in the money (first, second, or third)? d. Neither of your horses finishes in the... more
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10/16/13

Urgent! Please help me! I have an exam in two days and I really need help with these questions. Please explain the steps and answers as thoroughly as possible.
1. Find the derivative f'(x). (a) f(x)=xexcosx (b) f(x)=secxtanx (c) f(x)=sinx/1+cosx   2. Let g(x) be a differentiable function such that g(0)=2 and g'(0)=3. (a) f(x)=(g(x))3 (b)... more
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10/16/13

Limit of the following:
LIM x→1+       ((1/LN(x)) - (1/x2-1))
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10/16/13

Integration
∫√(4x2+40x)dx
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10/14/13

I need to find an area of 3 rectangles.
Question: A breeder of horses wants to fence three rectangular grazing areas along a river with 600 meters of fencing. On one of the length sides there is a river and no fence is needed along that... more
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10/14/13

An urn contains 9 red marbles, 7 white marbles, and 5 blue marbles. You grab 4 of the marbles. What is the probability that:
a. 2 of the marbles are white and the other 2 are blue? b. They are not all of the same color?
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10/14/13

There are 6 different colored signal flags which can be hoisted onto a mast (red, white, blue, yellow, green, and black).
4 of the flags are randomly selected and hoisted. What is the probability that The red flag is at the top or at the bottom?
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10/09/13

how to write an expression that can be used to find the nth term of each sequence?
numbers involved: 7,10,13,16,19,22,25
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10/09/13

Find an equation of the tangent line to the curve (x^2)(e^y)+(ye^x)=4 at the point (2,0).
I think you're supposed to use implicit differentiation, and then solve for the equation after finding the slope.
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10/08/13

What is the height of the building?
Jay is 120 meters from the base of a building and Mary is 40 meters from the base of the building. Jay's angle of elevation when looking at the top of the building is X and Mary's is 2X. What is... more
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10/07/13

Probability- People
In how many different ways can you select 4 freshmen, 5 sophomores, 3 juniors, and 7 seniors from a group containing 15 students of each standing?
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10/07/13

In how many different ways can you draw 3 cards from a standard deck if the order in which they are drawn:
a. Matters? b. Does not matter? c. The answer in question a. is how many times larger than that in question b.?
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