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Both 'ser' and 'estar' translate as 'to be' in English, so it's a little confusing to know which one to use. The most basic rule is that 'ser' is used for permanent states such as a characteristic or some...

Use the product rule: d/dx(uv) = uv' + u'v, with u = x^2 and v = e^(tan(x)), so that u' = 2x and v' = sec^2(x) * e^(tan(x)), and so the answer is 2x * e^(tan(x)) + x^2 * sec^2(x) * e^(tan(x)) .

Alkenes have stereoisomers because no free rotation possible around the C=C double bond, as to do so would break the pi-bond between the two atoms. which requires energy to break.

Use the formula for the surface area of revolution, which requires dy/dx. So find dy/dx = sinh(x) and substitute dy/dx and y into the formula with the limits provided in the question (2 and 6). Then evalu...

Introduction - definitions of monetary policy, fiscal policy,  and unemployment.

Monetary policy is expansionary - rate of interest decreased, value of savings decreased, spending increased, borrow...