Cual es el dominio de la Función \( F(x)=1 / x \) ?

Determine the following. \( \int 2 e^{-0.5 \mathrm{x}} \mathrm{dx} \) \( \int 2 e^{-0.5 \mathrm{x}} \mathrm{dx}=\square \) (Type an exact answer.)

a) \( x^{2}-15 x-100 \)

21. \( x^{2}=81 \)

b) Using the \( 1^{\text {st }} \) principal differentiate \( y=4 x^{2}+5 x-3 \) and determine the gradient of the curve at \( x=-3 \)

Exercise 1 XYZ Beverages Ltd. produces coffee. The initial price of coffee was \( \$ 20 \) per kg , and the quantity demanded per month was \( 1,200 \mathrm{~kg} \). The price rose to \( \$ 25 \) per kg , but the quantity demanded decreased to \( 1,150 \mathrm{~kg} \). A. Calculate the elasticity of demand (PED)