14. Which of these statements is true about life on colonial farms from the perspective of European colonists? A. The hardest part of life on a farm was clearing the land of trees. B. Most farms were noisy and smelly. C. Farms were usually very close to shops. D. Colonial farmers used very advanced tools.

3.20. Para \( n \in \mathbb{Z}^{+} \)se define \( f(n) \) como el número de enteros positivos \( <n \) que son primos relativos con \( n \), por ejemplo \[ \begin{aligned} f(1)=1, \\ f(2)=1, \\ f(3)=2, \\ f(4)=2\end{aligned} \] 3.20.1. Calcular \( f(10), f(13), f(18), f(24) \) \( \begin{array}{l}\text { 3.20.2. Para } n=12,18,19,25 \text { calcule } \\ \text { 3.20.3. Infiera una fórmula para } \\ \qquad\end{array} \)

Ex 4: Give the opposite a) A merciful king

Match the type of noun below to its correct name. Abstract Noun Cat Team

Physical Activity for a Healthy Weight

2. Sea \( T: P_{2} \rightarrow M_{22} \) la función definida por \[ T\left(c+b x+a x^{2}\right)=\left(\begin{array}{cc}b+c & a+b \\ a+b & b-c\end{array}\right) \] cuyas bases canónicas se denotan por \( B_{1} \) para \( P_{2} \) y \( B_{2} \) para \( M_{22} \). (a) Compruebe que \( T \) es una transformación lineal. (b) Determine la representación matricial de \( T \) y el nucleo de \( T \). (c) El rango y nulidad de \( T \).