(b) Find the elasticity of demand and supply at the equilibrium price for the demand function \( p=\sqrt{36-x^{2}} \) and supply function \( x=p^{2}-6 \), where \( p \) and \( x \) are price and quantity respectively.

(c) Use Bisection method to solve \( x^{3}-9 x+1=0 \) for the root between \( x=2 \) and \( x=4 \). 5 marks) (d) Using \( \sin (0.1)=0.09983 \) and \( \sin (0.2)=0.198 \), find an appropriate value of \( \sin (0.15) \) by using Langranges interpolation.

Determina las dimensiones de una caja \sin tapa con un volumen de 300 cm³ que minimizan el área superficial, utilizando relación entre largo, ancho y alto.

A hotdog vendor must pay a monthly fee to operate a food cart in the city park. The cost in dollars of selling \( x \) hundred hotdogs in a month can be approximated by \( \mathrm{C}(\mathrm{x})=150+60 \mathrm{x} \) Complete parts (a) through ( d\( ) \) below. Interpret these results, choose the correct answer below. Take the sales level of 1000 hotdogs as an example. Select the correct choice below and fill in the answer box to complete your choice. A. At a sales level of 1000 hotdogs, the average cost is \( \$ 75 \) per 100 hotdogs. (c) Find the marginal average-cost function. The marginal average-cost function is \( \bar{C}^{\prime}(x)=\square \) (d) Find and interpret the marginal average cost at sales levels of 1000 hotdogs and 5500 hotdogs. The marginal average cost at sales levels of 1000 hotdogs is \( \$ \square / 100 \) hotdogs) \( { }^{2} \). (Round to the nearest cent as needed.)

The revenue (in thousands of dollars) from producing \( x \) units of an item is modeled by \( R(x)=13 x-0.01 x^{2} \). a. Find the average rate of change in revenue as \( x \) changes from 1004 to 1005 . b. Find the marginal revenue at \( x=500 \).

\( \int e ^ { \frac { - 1 } { x } } d x \)