Chapter 4: Problem 41
\(y=\left\\{\begin{array}{ll}{-x^{2}-2 x+4,} & {x \leq 1} \\ {-x^{2}+6 x-4,} & {x > 1}\end{array}\right.\)
Chapter 4: Problem 41
\(y=\left\\{\begin{array}{ll}{-x^{2}-2 x+4,} & {x \leq 1} \\ {-x^{2}+6 x-4,} & {x > 1}\end{array}\right.\)
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Get started for freeIn Exercises 23 and \(24,\) a particle is moving along the curve \(y=f(x) .\) \(y=f(x)=\frac{10}{1+x^{2}}\) If \( \)d x / d t=3 \mathrm{cm} / \mathrm{sec}, \text { find } d y / d t \(d x / d t=3 \mathrm{cm} / \mathrm{sec},\) find \(d y / d t\) at the point where $$x=-2 \text { . } \quad \text { (b) } x=0 . \quad \text { (c) } x=20$$
$$ \begin{array}{l}{\text { Multiple Choice All of the following functions satisfy the }} \\ {\text { conditions of the Mean Value Theorem on the interval }[-1,1]} \\ {\text { except } }\end{array} $$ \((\mathbf{A}) \sin x\) \((\mathbf{B}) \sin ^{-1} x\) \((\mathrm{C}) x^{5 / 3}\) (D) \(x^{3 / 5}\) (E) \(\frac{x}{x-2}\)
Boring a Cylinder The mechanics at Lincoln Automotive are reboring a 6 -in. deep cylinder to fit a new piston. The machine they are using increases the cylinder's radius one-thousandth of an inch every 3 min. How rapidly is the cylinder volume increasing when the bore (diameter) is 3.800 in.?
Wilson Lot Size Formula One of the formulas for inventory management says that the average weekly cost of ordering, paying for, and holding merchandise is $$A(q)=\frac{k m}{q}+c m+\frac{h q}{2}$$ where \(q\) is the quantity you order when things run low (shoes, radios, brooms, or whatever the item might be), \(k\) is the cost of placing an order (the same, no matter how often you order), \(c\) is the cost of one item (a constant), \(m\) is the number of items sold each week (a constant), and \(h\) is the weekly holding cost per item (a constant that takes into account things such as space, utilities, insurance, and security). (a) Your job, as the inventory manager for your store, is to find the quantity that will minimize \(A(q) .\) What is it? (The formula you get for the answer is called the Wilson lot size formula.) (b) Shipping costs sometimes depend on order size. When they do, it is more realistic to replace \(k\) by \(k+b q,\) the sum of \(k\) and a constant multiple of \(q .\) What is the most economical quantity to order now?
Moving Shadow A light shines from the top of a pole 50 ft high. A ball is dropped from the same height from a point 30 ft away from the light as shown below. How fast is the ball's shadow moving along the ground 1\(/ 2\) sec later? (Assume the ball falls a distance \(s=16 t^{2}\) in \(t\) sec. $)
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