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A limit of the form 0 times infinity |
2007-11-13 |
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Russell pose la question :
find the following limit
lim x((e^1/x) -1) as
x --> infinity
Penny Nom lui répond. |
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Radial motion |
2007-11-13 |
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abdulai pose la question :
a circular saw with diameter 18.4cm rotates at 2400rpm. What is the angular speed of a point on the edge of the saw blade in radians per second?
Penny Nom lui répond. |
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Our company charges a 4% margin |
2007-11-13 |
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Nadja pose la question :
Our company charges a 4% margin on top of a pay rate to obtain the total charge rate. A
client is denying that the total charge rate is calculated in the following
way:
Pay rate/0.96 = Charge rate
Please could you provide me with an explanation which I can pass on as
to why it is calculated in this way?
Penny Nom lui répond. |
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The areas of a rectangle and a triangle |
2007-11-13 |
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karen pose la question :
hoe to calculate the shaded area of a triangle in a rectangle
Penny Nom lui répond. |
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EFGH x 4 = HGFE |
2007-11-13 |
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ROBIN pose la question :
FIND THE NUMBERS THAT EACH LETTER STANDS FOR IN THE PROBLEM BELOW.
EFGH x 4 = HGFE
Stephen La Rocque lui répond. |
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A 10% markup then a 10% discount |
2007-11-13 |
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svetik pose la question :
The best selling dessert at Chez Russell earns revenue of $5000 per week. During Restaurant Week, they are required to give a 10% discount on this dessert. Because the owner is a crook, he decides to mark up the price the week before Restaurant Week and then give the 10% discount off the marked up price. During the marked up week, they still sold the same amount of pieces as any prior week. However, they expect to sell 100 more pieces during restaurant week. If the revenue from this dessert is the same for the marked up week and restaurant week, what is the normal price of the dessert, rounded to the nearest cent?
Penny Nom lui répond. |
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Local maxima, minima and inflection points |
2007-11-13 |
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Russell pose la question :
let f(x) = x^3 - 3a^2^ x +2a^4 with a parameter a > 1.
Find the coordinates of local minimum and local maximum
Find the coordinates of the inflection points
Harley Weston lui répond. |
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p-values and t-distributions |
2007-11-13 |
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Don pose la question :
I have a t-test statistic of 1.28 and a degree of freedom of 6.
I know the p-value is .248 I cannot figure out how to calculate that value.
I have used software to get it but I want to know how to calculate it using
the t-distribution table.
Harley Weston lui répond. |
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Whole numbers and improper fractions |
2007-11-13 |
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Jennifer pose la question :
I would like to know how you convert whole numbers into improper fractions
Melanie Tyrer lui répond. |
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A particle moves in the xy-plane |
2007-11-12 |
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Russell pose la question :
A particle moves in the xy-plane with
X = 2t^3 - 12t^2 + 18t
Y = 3t^4 - 28t^3 + 72t^2
find an equation of the line tangent to the given curve at t_0_ = 1
note: t_0_ is t subscript 0
Harley Weston lui répond. |
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nombre d'or |
2007-11-12 |
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Léo pose la question :
On suppose que le rapport a+b/a est égal au nombre d'or (1+racine carrée de 5/é)
a) Calculer (a+b) au carré et a+(a+b) en fonction de a.
Je n'y arrive pas. Pouvez-vous m'aider?
merci
Claude Tardif lui répond. |
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The third side of a triange |
2007-11-12 |
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Christine pose la question :
I need the inequality to describe the third side of a triange if two sides are known. First side is 23 and second side is 15. What is the third side?
Stephen La Rocque and Victoria West lui répond. |
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Maximize his profit |
2007-11-12 |
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apoorva pose la question :
During the summer months Terry makes and sells necklaces on the beach. Last summer he sold the necklaces for $10 each and his sales averaged 20 per day. When he increased the price by $1, he found that he lost two sales per day.
a. Find the demand function, assuming it is linear.
b. If the material for each necklace costs Terry $6, what should the selling price be to maximize his profit?
Penny Nom lui répond. |
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Family of functions |
2007-11-12 |
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Russell pose la question :
Consider the family of functions
f(t)= Asin3t + Acos3t +Bsin8t + Bcos8t
find exact values of parameters A and B so that f(0) = 2 and f ' (0) = 1
Stephen La Rocque lui répond. |
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What number best completes the series? |
2007-11-12 |
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Grace pose la question :
What number best completes the series?
2 3 7 13 27 ____
Stephen La Rocque, Penny Nom and Harley Weston lui répond. |
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