Sippose that a cell dehydration model satisfies the differential equation, \( \frac{d w}{d t}=-\mathrm{kW}^{2 / 3} \) Assume thet the volume of the water in the cell is initially \( w(0)=8 \mathrm{~mm}^{3} \). Also, assume that the volume of the water has decreased to \( w(6)=1 \mathrm{~mm}^{3} \) after 6 hours (i) Solve the difference equation by separating like variables

Aufgabe 2 von 9.4 .5 - Grundlagen der Differentialiechnung Die zweite Ableitung der ganzrationalen Funktion \( f(x)=-5 x^{4}-x^{3}-2 x^{2}-4 x \) ist \[ f^{\prime \prime}(x)=-60 x^{2}-6 x-4 \] Bestimme die dritte Ableitung \( f^{\prime \prime}(x) \) A \[ f^{\prime \prime}(x)=1 \]

4) \( (4,2),(5,-8) \)

Nelson scores 27 out of 40 in a history test. Work out his score as a percentage.

Given the functions: \[ f(x)=x^{3}+3 x \quad g(x)=\sqrt{7 x} \quad h(x)=3 x-2 \] Evaluate the function \( (f \circ f)(x) \) for \( x=-2 \). Write your answer in exact simplified form. Select "Undefined" if applicable. \( (f \circ f)(-2) \) is

Quantos alunos têm a escola?